rfp for tri-band data reception system...rfp for tri-band data reception system nrsc/isro/india page...

ISRO-NRSC-STSG-RFP-002

Request for Proposal (RFP) for

Supply, Installation and Commissioning

Of

TRI-BAND (S,X,Ka) DATA RECEPTION SYSTEM FOR LEO SATELLITES

AT

ANTARCTICA

Jun, 2016

Satellite Tracking Systems Group Satellite Data Reception & Ingest Systems Area

National Remote Sensing Centre Balanagar, Hyderabad

RFP for Tri-band Data Reception System

NRSC/ISRO/INDIA

Contents

1 INTRODUCTION ............................................................................................................................................. 4

2 GENERAL INSTRUCTIONS FOR SUBMISSION OF PROPOSAL ............................................................................ 5

3 SYSTEM DESCRIPTION .................................................................................................................................... 7

3.1 RF SYSTEMS ................................................................................................................................................ 12 3.1.1 Antenna & Feed System ............................................................................................................. 12 3.1.2 Data Reception chain ................................................................................................................. 14 3.1.3 Tracking Chain ........................................................................................................................... 15 3.1.4 S-band TTC Chain ....................................................................................................................... 16

3.2 ANTENNA CONTROL SERVO SYSTEM ................................................................................................................. 18 3.2.1 Servo Control Unit ...................................................................................................................... 18 3.2.2 Antenna Control Unit ................................................................................................................. 19 3.2.3 Station Control Computer .......................................................................................................... 22

3.3 MECHANICAL SYSTEMS .................................................................................................................................. 24 3.3.1 Antenna mechanical system ...................................................................................................... 24 3.3.2 Antenna Mechanical considerations .......................................................................................... 26 3.3.3 Structural analysis ...................................................................................................................... 27 3.3.4 Mechanical Details ..................................................................................................................... 28

4 SCOPE OF THE WORK ................................................................................................................................... 29

5 TERMS & CONDITIONS ................................................................................................................................. 30

5.1 ELIGIBILITY CRITERIA ...................................................................................................................................... 30 5.2 DESIGN REVIEWS .......................................................................................................................................... 30 5.3 DELIVERY SCHEDULE AND INSTALLATION ............................................................................................................ 30 5.4 ACCEPTANCE TEST PLAN ................................................................................................................................ 31 5.5 TRAINING & DOCUMENTATION ....................................................................................................................... 32 5.6 WARRANTY ................................................................................................................................................. 32 5.7 COMPREHENSIVE MAINTENANCE ...................................................................................................................... 33 5.8 SUPPLY OF CRITICAL SPARES ............................................................................................................................ 33 5.9 VISIT TO VENDOR SITE ................................................................................................................................... 34 5.10 PAYMENT TERMS .......................................................................................................................................... 34 5.11 LIQUIDATED DAMAGES .................................................................................................................................. 34 5.12 EVALUATION CRITERIA .................................................................................................................................... 34 5.13 INSURANCE .................................................................................................................................................. 35 5.14 ARBITRATION AND JURISDICTION ...................................................................................................................... 35 5.15 FORCE MAJEURE........................................................................................................................................... 35

ANNEXURE-1: LIST OF CRITICAL SPARES ............................................................................................................... 36

ANNEXURE-2: COMPLIANCE STATEMENT ............................................................................................................ 37

ANNEXURE-3: PRICE BID FORMAT ....................................................................................................................... 39


NRSC/ISRO/INDIA

List of Figures

Figure 1: Function Block Diagram of Data Reception Station (RF chain) .............................................. 13 Figure 2: Function Block Diagram of Data Reception Station (Antenna Control Servo System) .......... 20 Figure 3: Station Control Computer Configuration ............................................................................... 22 Figure 4: Details of existing pile foundation ......................................................................................... 25

List of Tables Table 1: Vendor details ........................................................................................................................... 5 Table 2: Overall Technical Specifications of Data Reception Station ..................................................... 7 Table 3: Hot redundant Systems ........................................................................................................... 10 Table 4: Electrical Specifications ........................................................................................................... 10 Table 5: Indoor Unit Environmental Specifications .............................................................................. 10 Table 6: Outdoor unit Environmental specifications ............................................................................ 11 Table 7: Antenna Control servo modes ................................................................................................ 21


NRSC/ISRO/INDIA

1 Introduction

National Remote Sensing Centre (NRSC) is one of the Centres of Indian Space Research

Organisation (ISRO) under the Department of Space, Government of India. The prime

responsibility of NRSC is to acquire data from different remote sensing satellites, product

generation & dissemination as well as application development, aerial services and capacity

building.

NRSC has established Antarctica Ground Station for Earth Observation satellites (AGEOS) in

Dec, 2012 to receive data from different Indian Remote Sensing Satellites at Larsemann Hills

(690S & 760E), Antarctica in collaboration with National Centre for Antarctica & Ocean

Research (NCAOR), Ministry of Earth Sciences, India. Its main role is to meet the data

acquisition requirements of beyond NRSC Shadnagar Ground station visibility. AGEOS

facility contains

(a) Multi mission 7.3 Meter S/X band Data Reception system with TTC capability

(b) C-band 7.5 M Data Communication Antenna to transfer the data to NRSC, Shadnagar

in near real-time using 36 MHz Intelsat link.

(c) Control room with two container space at Bharathi Station, Larsemann Hills to

accommodate RF, communication and computer systems

The AGEOS facility has Voice over IP, Video conference and Internet facility. The Station is

operated in fully automated environment and accessible from NRSC, Shadnagar for remote

monitoring and control. However, two NRSC engineers are stationed at AGEOS to support

Station operations and maintenance activities.

ISRO is planning to launch multiple remote sensing satellites for cartographic applications.

These satellites transmit data to ground in Ka-band (25.5–27.0 GHz) and X band (7.9-8.5

GHz) with signals in Right Hand Circular Polarization (RHCP) and Left Hand Circular

Polarization (LHCP) simultaneously. These satellites also transmit telemetry data in S band

(2.2-2.3 GHz) through RHCP & LHCP. Accordingly, NRSC is planning to augment AGEOS

facility with Ka-band Data Reception System for LEO satellites.

The RFP document defines the Statement of Work (SOW) and specifications of S, X, Ka band

Data Reception system for LEO satellites to be installed at Antarctica. The objective of this

RFP is facilitating vendors to participate in the bidding process for the supply, installation

and commissioning of S, X, Ka-band reception system for LEO satellites.

The proposal submitted in response to this RFP should be in conformity with the

requirements/specifications laid down in this document. The proposed system shall be

installed at Bharathi Station, Larsemann Hills Antarctica and it will be operated along with

existing 7.3 Meter S/X band Data Reception System. In Antarctica, where space and power

are crucial the proposed systems needs to be space and power efficient. Also, It should cater

to multi mission data reception in S, X & Ka bands and transmit capability in S-band for TTC

support.


NRSC/ISRO/INDIA

2 General Instructions for submission of Proposal 2.1 Vendors must fill the detailed clause wise Compliance statement as per Annexure-2

in the Technical bid. Similarly, the vendor has to fill the price bid as per Annexure-3

which is enclosed in the RFP. Also the vendor has to enclose the dummy price bid

(without price details) to the Technical bid. Vendor to ensure compliance for supply

of all line items. Vendor should not include price details in the Technical bid. If price

details are indicated in Technical bid the proposal will be rejected. The vendor has to

invariably quote for all the line items in the price bid.

2.2 The proposals (Technical and Price bids) submitted must be valid for 180 days from

the tender due date

2.3 Vendors are encouraged to provide as much details as possible including the

company profile and experience, details of similar works done for other customers,

technical reference material and any other material as deemed to fit in the format

(not limited to) given below. The same shall be uploaded in the ‘Documents solicited

from the vendor’ Template in EGPS. Table 1: Vendor details

SL NO Description Details

1. Year of Establishment

2. Vendor’s Area Of Core Competence

3. Infrastructure details (Area, facilities, manpower etc.,)

4. Annual turnover in the last two financial years

5. Vendor should necessarily have the experience in design, installation and commissioning of 7 Meter or above S/X band full motion LEO antenna (with or without Ka-band LEO) at polar stations. (Provide/enclose list of installations with address, installation completion and performance certificate from end user etc.)

6. Vendor should also have proven experience in design and development of Ka band full motion antenna systems (Provide necessary evidence with respect to design, simulation results, product realization, System test results, test facility available and test methodology followed etc.)

7. Quality Management system (QMS) certification

8. Willingness to provide Non-Disclosure Agreement, Confidential agreement on NRSC shared information

2.4 Vendor has to enclose the detailed list of deliverables (Bill of Materials) in the

Technical bid which shall be uploaded in the ‘Documents solicited from the vendor’s

template.

2.5 Place of Delivery: Quotation is to be submitted keeping the place of delivery as CAPE

TOWN, South Africa.


NRSC/ISRO/INDIA

2.6 Pre-bid meeting: Pre-bid meeting between NRSC and the prospective vendors

interested in submitting proposals will be held at NRSC Hyderabad on 20th July, 2016.

During this meeting, vendors can seek clarifications required by them to generate

proposals. The addendum/corrigendum if any, after the pre-bid meeting shall be

published in NRSC and ISRO websites and will be accessible to all the vendors. The

bid submitted by the vendors must comply with the RFP together with the

addendum/corrigendum published. NRSC strongly recommends participation by the

vendors in pre-bid meeting at their own cost. Those who wish to participate should

send their willingness regarding their participation with name, position, address and

contact details at least four working days in advance before the pre-bid meeting.

Foreign nationals must indicate their nationality, passport details. A scanned copy of

the valid passport along with the valid visa (Business or Conference) should be sent

to Senior Purchase and Stores officer, Purchase Unit-2, National Remote Sensing

Centre, ISRO, Balanagar, Hyderabad-500037, Telangana, India. Email:

[email protected]. in case of any change in the date and venue of the pre-bid

meeting will be displayed in ISRO/NRSC website.

2.7 Interested vendors can be present at NRSC during opening of Technical bids.

Technical bids will be opened in the presence of the attending vendors or their

authorised representatives. Authorised representatives must carry a proper

identification proof and an authorisation letter. The commercial bids will be opened

in the presence of the attending vendors or their authorised representatives on a

date that will be notified individually to the vendors whose technical bids are found

to be suitable.

2.8 All valid technical bids will be evaluated for their suitability by a committee at NRSC

and the decision of the committee shall be final for accepting / rejecting any of the

bids.

2.9 The technical information and other details shared by NRSC shall remain exclusive

property of NRSC. Vendor shall make no attempt to unlawfully reveal, misuse or

encroach upon the data/information provided by NRSC.

2.10 All communications should be addressed to:

Senior Purchase & Stores officer, Purchase Unit-2

National Remote Sensing Centre, ISRO, Balanagar, HYDERABAD, Telangana, 500 037, INDIA Phone : +91 40 2388 4065, 2388 4066 Fax : +91 40 2387 8695 E-mail : [email protected]

mailto:[email protected]

mailto:[email protected]


NRSC/ISRO/INDIA

3 System Description S, X, Ka band Data Reception system consists of Antenna, Feed, Radome, Tracking pedestal,

Antenna platform, RF systems, Baseband systems, Servo control system and TTC chain. The

ground station shall have a G/T of 35.5 dB/°K in Ka-band, 32 dB/°K in X-band and 19 dB/°K in

S-band at 5° EL. The Reception system should be capable of receiving dual circular polarized

signals simultaneously in S, X & Ka bands. The operating frequency range is 25.5 to 27.0 GHz

in Ka band, 7.9 to 8.5 GHz in X-band, 2.2 to 2.3 GHz in S band reception. S band systems shall

have simultaneous transmission and reception facility. The proposed Data Reception system

shall meet the specifications over the total operating frequency range for all three bands as

specified in Table 2.

Table 2: Overall Technical Specifications of Data Reception Station

SL NO PARAMETERS SPECIFICATIONS

1. (a) Configuration Dual reflector, dual shaped , Cassegrain for X & Ka; Prime focus or Cassegrain for S-band;

(b) Main Reflector and its surface accuracy

Shaped Parabola with not more than 7.5 meter diameter and less than/equal to 0.30 mm RMS in assembled & operational condition

(c) Sub reflector and its surface accuracy

Suitable shaped diameter with less than 0.05 mm RMS

2. Frequency Range

(a) Ka-Band Receive 25.5 to 27.0 GHz

(b) X band Receive 7.9 - 8.5 GHz

(c) S-Band Rx 2.2 to 2.3 GHz

(d) S band Tx 2.025-2.120 GHz

3. Feed Polarization

(a) Ka band Data Reception (Rx) : RHCP & LHCP simultaneous Track Rx RHCP & LHCP selectable

(b) X band Data Reception(Rx): RHCP & LHCP simultaneous Track Rx RHCP & LHCP selectable

(c) S band Receive Data Rx RHCP & LHCP simultaneous Track Rx RHCP & LHCP simultaneous

4. S Band

(a) Tx/Rx Isolation (b) Tx polarization (c) Tx EIRP

120 dB min RHCP & LHCP switchable 53 dBW min

5. On Axis Axial Ratio/ Cross polarization

(a) Ka band ≤ 1.0 dB

(b) X band ≤ 1.0 dB

(c) S band ≤ 1.5 dB

6. G/T dB/0K (with Radome)

(a) Ka band at 25.5 GHz 35.5 or better at 5° EL @ 23 °C, clear sky

(b) X band at 7.9 GHz 32.0 or better at 5° EL @ 23 °C, clear sky

(c) S band at 2.2 GHz 19.0 or better at 5° EL @ 23 °C , clear sky


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7. First Side Lobe Level S, X & Ka band

14 dB down or better from the beam Peak

8. S, X & Ka band Tracking mechanism

Single Channel Monopulse

9. Down Conversion

(a) Ka band Data channel Ka band to 1.2/2.4 GHz IF

(b) X band data channel Single ( X band to 720 MHz)

(c) Ka, X, S Track & S data Single or Dual

10. Acquisition/Manual modes Standby, Ready, Manual , Slew, Designate

11. Tracking modes (with built in auto diversity)

Program, S Auto, X auto, Ka Auto track

12. Auto tracking Accuracy (for satellite orbit height of 400 km and Zenith pass)

Ka band: 0.025° for C/No more than 80 dBHz X band: 0.035° for C/No more than 80 dBHz S band: 0.04° for C/No more than 65 dBHz

13. Pointing Accuracy and Position resolution

Better than 0.07° and 0.0010

14. Type of mount Fully steerable EL over AZ over Train axis

15. Train axis tilt Minimum 6° wedge with programmable orientation

16. Drive configuration AZ & EL axis: Dual drive in Counter-torque Train axis: Single/dual

17. Maximum Tracking Velocity 15°/sec in AZ ; 10°/sec in EL; 5°/sec in Train

18. Maximum Tracking Acceleration

6°/sec² in AZ; 5°/sec² in EL; 2°/sec2 in Train

19. Antenna Coverage

AZ : ± 360o; EL : -1o to+180o Train : 0 to +180° in CW; 0 to -180° in CCW

21 Dual channel Demodulator (Sub system)

20. Input IF frequency Selectable between 720 MHz & 1.2 /2.4 GHz

21. Modulation schemes BPSK/QPSK/OQPSK/8PSK

22. Per channel maximum Bit rate capability of each IF at 720 MHz with coding

BPSK : 320 Mbps QPSK and its variants : 640 Mbps 8 PSK : 960 Mbps

23. Per channel Maximum Bit rate capability of each IF at 1.2/2.4 GHz with coding

BPSK : 500 Mbps QPSK and its variants : 1000 Mbps 8 PSK : 1500 Mbps

24. Decoding as per the CCSDS Standard (Programmable), for data rates specified with 720MHz and 1.2/2.4 GHz IF

1. Differential decoding. 2. Viterbi (Convolution) - Single & Dual decoders. 3. 4D-TCM (Multi-TCM) decoding 4. LDPC decoding

25. Acquisition range Programmable up to ± 1 MHz

26. Output data and clock signals (true and inverted)

BPSK : Data and Clock QPSK : 1. I Data, Q Data, I Clock, Q Clock 2. Merged data (I+Q) and merged clock 8 PSK : 1. Three data streams (I, Q, Z) and clock 2. Merged data (I+ Q+Z) and merged clock


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27. Output logic Simultaneous ECL & LVDS for data & clock signals

28. Data format Selectable from NRZ-L, NRZ-M, NRZ-S.

29. Input/output Connectors SMA (F)/ SMA(F) for ECL; RJ45 for LVDS

TTC Processor (Sub system)

30. Telemetry

(a) IF frequency (b) Dynamic Range (c) Modulation schemes (d) Modulation codes (e) Demod Sub-Carrier frequency (f) Data Rates (g) Coding supported

70 MHz -20 to -100 dBm PCM/PSK/PM, PCM/BPSK, PCM/QPSK, PCM/PM and PCM/FM NRZ-L,M,S and Bi-Ø-L,M,S 1-1024 KHz 250 bps – 1 Mbps RS, Viterbi (1/2)-CCSDS standard

31. Ranging

(a) Coherent (b) Ranging Technique (c) Major Tone (d) Minor Tones (e)Range Accuracy (3 sigma)

2 way Sine wave tone Up to 500 KHz selectable Selectable format 30 m RSS at 27 dB Hz SNDR with 100 KHz MRT

32. Doppler

Coherent Resolution

2 way 0.01 Hz

The functional block diagram of Data Reception Station (RF chain) is shown in Figure 1. In

order to achieve better overall system performance, the location of RF units (hub/raiser/

pedestal/ control room) may be proposed by the vendor. Vendor shall indicate the

advantage of the proposed changes with reference to Figure 1.

The tracking system shall have the capability to track the Low Earth Orbit (LEO) satellites of

400 KM orbit onwards without any keyhole. In view of narrow beam width in Ka band the

mechanical, RF, Servo system design should be taken care to achieve the desired pointing

and tracking accuracies. The system shall operate in fully automated environment and it

shall have full autonomy to meet any contingency requirements. Also it shall have hot

redundancy with capability to swap the modules/units remotely based on fault diagnostics

through GUI in case of failures. The required hot redundant systems are given in Table 3.


NRSC/ISRO/INDIA

Table 3: Hot redundant Systems

SL NO Description Hot redundancy

1. Ka-band down converter 1 additional unit/channel

2. X-band down converter 1 additional channel

3. S-band Data down converter 1 additional channel

4. S-band Up converter 1 additional channel

5. S-band (data RCP) LNA 1

6. S-band (data LCP) LNA 1

7. SSPA 1

8. TTC Processor 1

The approximate distance between the control room and antenna pedestal would be 320

meter. The vendor should supply and lay suitable cables of required length through cable

trench. The supply and installation of cable trench is also the responsibility of the vendor.

The signal and the power cables have to be bunched separately in a single cable trench.

Also, necessary cabling between control room and pedestal has to be laid to extend the

internet and IP phone facility at pedestal room.

Electrical and Mechanical characteristics of proposed Reception system shall comply with

the EIA standard. The outdoor and the indoor components of the Antenna System shall be

designed and built to comply with the following electrical requirements:

Table 4: Electrical Specifications

SL NO Parameter Value

1. Single phase 230 V AC +/- 10 % 50 Hz (Phase to Neutral)

2. Three phase 400 V AC+/- 10 % 50 Hz (Phase to Phase) 230 V AC+/- 10 % 50 Hz (Phase to Neutral)

The station shall be installed close to coastal area, hence necessary saline environment

protection shall be provided to the outdoor units. The operational life of the Data Reception

System is expected to be at least 10 years. Vendor shall also ensure the availability of spares

(including drive, RF components, bearings and other moving parts of the antenna & control

system) during this period. The equipment used shall have the capability to the following

environmental conditions. The indoor and the outdoor components of the Antenna System

shall be designed and built to comply with the following environmental requirements as

shown in Table 5 and Table 6.

Table 5: Indoor Unit Environmental Specifications


1. Operating temperature 10 to +300 C

2. Storage temperature -20 to +400 C

3. Humidity 20 to 80% RH non condensing


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Table 6: Outdoor unit Environmental specifications


1. Operating temperature -40 to +200 C

2. Storage temperature -20 to +400 C

3. Humidity 20 to 100% RH with condensing

4. Wind Speed with Radome Operational Gusting Survival

60 KMPH 80 KMPH 250 KMPH


NRSC/ISRO/INDIA

3.1 RF Systems

RF Systems comprises of Antenna & Feed, LNA, feed electronics, up/down converters,

demodulators, tracking receiver, Fiber Optic transceivers, modulators, TTC processor and

SSPA. Vendor shall ensure that output Signal levels of each sub system are within the

dynamic range of the subsequent sub system. The receive system shall have built-in

provision for end-end testing and performance evaluation in long loop. One Spectrum

Analyzer of 3.2 GHz required to monitor the RF systems performance. All the configurable

subsystem/units including spectrum analyzer should have remote control interface to

support remote operation.

3.1.1 Antenna & Feed System

The Antenna system shall have main reflector in parabola shape and a suitable sub reflector

for X/Ka feed in Cassegrain configuration. It also should have suitable configuration for S

band feed to meet S band G/T.

S, X and Ka band feeds mounted on antenna shall be designed for maximum data chain G/T

for the respective frequency bands. A Low Noise Amplifier with best possible Gain and Noise

temperature shall be used to meet specified G/T. Any G/T degradation in Ka band due to

thermal effects of main reflector and backup structure shall overcome with suitable

compensation techniques. Waveguides shall be used with suitable coating to achieve low

loss in Ka band feed. All the feed components including LNAs are to be housed in a

pressurized enclosure to prevent moisture. Dehydrator is required for feed equipment in

order to address moisture related issues. One additional LNA is required in S band of data

chain per polarization to serve as hot redundant.

The system shall utilize suitable design which enables the simultaneous data reception in

both polarizations for all bands. Test signal injection for all the bands shall be made

available through a test coupler prior to LNA to carryout loop checks. Separate data and

tracking ports are to be provided. Both X and Ka bands should have provision to select any

one polarization at a time for tracking and it should be available remotely through TCP/IP.

The S band data and tracking feed should perform reception, auto tracking and transmission

functions. The S band system should be capable of transmitting a minimum EIRP of 53 dBW.

The feed shall provide simultaneous RHCP & LHCP outputs for both data and tracking. S

band feed shall have the capability to transmit in either of the circular polarizations based

on selection. The feed should have suitable filtering to reject high power transmit signals

and other cellular based signals operating in this range.


NRSC/ISRO/INDIA

Figure 1: Function Block Diagram of Data Reception Station (RF chain)

S Band down Converter

(2 Channel)

IF 2.2-2.3 GHz

IF 2.025-2.120 GHz

70 MHz

X band up conversion (2 Channel)

S band down converter (Tracking)

Ka band down converter (Tracking)

X band down converter (Tracking)

TLT

Tracking receiver

Ka band feed & feed electronics

Ka band Up conversion

K

÷

X

K X

+

X band feed & feed electronics

X band down conversion (2 Channel)

S Band down converter ( Tx MON)

÷

S band up converter

Coupler

SSPA

S band feed & feed electronics

Ka band Down conversion

F I B E R

O P T I C L I N K

F I B E R

O P T I C L I N K

LHCP

RHCP

IF Matrix

Dual input Demodulator-1



Three channel

Modulator

TTC processor

Spectrum analyzer

(*) AZ EL Tracking errors


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3.1.2 Data Reception chain

In Ka band, received signals in each polarization will be either QPSK/8PSK modulation. In

each polarization there will be maximum of three carriers spread over 1500 MHz spectrum.

Received Ka band data signals over 1500 MHz RF spectrum should be down converted to

Intermediate Frequency (IF) at 1.2/2.4 GHz. The IF signals at 1.2/2.4 GHz is driven to Control

room through fiber optic link for further down conversion/demodulation.

3.1.2.1 Data Up/Down Converters

Ka Band Up/Down Converter: Data signals from RHCP & LHCP feed ports should be down

converted from Ka band [25.5-27.0 GHz] to 1.2/2.4 GHz using a down converter. These sub

systems can be placed near to the feed to reduce the cable loss. Ka band data down

converter outputs at 1.2/2.4 GHz from pedestal should be driven through Fiber Optic link to

the control room. For receiving any frequency within 1500 MHz provision shall be made

available either in down conversion or demodulator. The unit should be remotely monitored

and controlled as it would be located in the pedestal or hub. One additional channel in

down converter is required to serve as hot redundant. Three Test Up converters are required

to perform Long Loop checks in Ka band.

X Band Up/Down Converter: This unit should have 2 channels for up conversion and 2

channels for down conversion with built in synthesizer. It should provide up / down

conversion signals from 720 MHz to 7.9 - 8.5 GHz and vice versa. The output of this up

converter is fed as long loop signal to 30dB loop coupler in RHCP and LHCP polarization. For

both down converter and up converter there should be a switching arrangement either

within the unit or outside the unit for selecting LHCP signal or second carrier of RHCP signal.

One additional channel is required for in down converter to serve as hot redundant. Two

Test up converters are required to perform Long Loop checks in X-band

3.1.2.2 FO link, IF Matrix, Data Demodulators

FO link should have sufficient number of channels to route data IF of all three bands from

pedestal to control room and vice versa. The Fiber optic channels should have frequency

range up to 3.2 GHz to accommodate complete 1500 MHz IF bandwidth centered at 1.2/2.4

GHz. The outputs of the Fiber optic link are connected to second stage down

converter/Demodulators. Vendor should supply the required Fiber Optic (FO)

transmitter/Receiver modules mounted on chassis at pedestal & Control room. Fiber optic

link should cater for an approximate distance of 320 Meter.

IF Matrix should have sufficient number of input ports to route Ka, X, S band Data IF, TTC

Processor (Tele command) and modulator outputs. Similarly it should have sufficient

number of output ports to connect it to demodulators, Two TTC processors (including

redundant), spectrum analyzers and Up converters. It should be of non-blocking

configuration with better than 70 dB isolation. It should not introduce any BER degradation

in any of the three bands. Suitable RF Power dividers/directional couplers should be


NRSC/ISRO/INDIA

provided with in the unit to route the IF to multiple out ports like demodulators and

spectrum analyzer simultaneously.

Three Dual channel Demodulators are required to receive data in Ka/X band. Each

Demodulator unit should be capable of demodulating two separate IF input signals in X & Ka

bands. The unit should be capable of demodulating the individual channels employing BPSK,

QPSK, UQPSK, OQPSK, 8 PSK modulation techniques with Differential decoding, Viterbi

Decoding-Single & Dual decoders, 4D-TCM, (Multi-Trellis Coded Modulation) decoding, LDPC

decoding, Enable/Disable of all the above Decoding and provide merged/ split outputs. All

the programmable parameters of the demodulator should have provision to monitor and

control through TCP/IP. The basic unit should have the provision to get upgraded for higher

data rates (continuous programmability is essential). The enhancement of per channel data

rate capability up to 2.0 Gbps in QPSK through Software license upgrade is preferred to

meet the future requirements.

Each of the dual channel demodulator unit should have one built in RF modulator for long

loop checks. System should have provision to use all three modulator outputs

simultaneously for long loop checks. It also should have provision to modulate either with

internal PRBS data or with external data source. It should generate a suitable IF to carryout

long loop checks in both X and Ka-bands. The unit should be capable of performing

BPSK/QPSK/8PSK modulations up to maximum data rates as specified in demodulator specs.

Also the modulator has provision to accept external data and clock inputs (as per

modulation scheme) in parallel/serial mode.

3.1.3 Tracking Chain

The system shall track the satellite in Ka or X band auto track mode using single channel

mono pulse technique with S band auto track and program track as backup modes. Tracking

in Ka band where half power beam width is approximately 0.1° is very critical. Tracking

accuracy in the order of 0.025° is required for successful acquisition and tracking of remote

sensing satellites. Single channel mono pulse tracking shall be adopted for efficient tracking.

Signal loss at Ka band is generally high, so sufficient care should be taken in realizing the

feed and components at Ka band to achieve required pointing and tracking accuracies.

3.1.3.1 Tracking Down converters

Ka, X & S band tracking down converters should have built in synthesizer to configure any

tracking frequency within the receiver frequency range. Tracking down converter shall have

the provision to down convert receive signals to match the input frequency of tracking

receiver. The output of the tracking down converter shall be the input to the tracking

receiver where simultaneous errors for all the four bands (Ka, X, SR and SL) are generated.

These units should be remotely monitored and controllable as it would be located in the

pedestal or hub.


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3.1.3.2 Tracking receiver

Tracking Receiver should be capable of taking minimum 4 inputs simultaneously and

depending on the signal strengths the unit should decide on which band to track i.e. auto

diversity facility should be employed. The auto error (AZ & EL) output of this unit is to be fed

to the servo control system. Tracking receiver should work in both coherent and non-

coherent mode.

3.1.4 S-band TTC Chain

S-band TTC chain should support Telemetry down link, transmit for command uplink,

ranging and Doppler measurement.

The data channel should have tunable up/down converters with 1 KHz step size. It shall have

built in synthesizer to receive any frequency within the S band reception frequency range.

An additional unit has to be configured in hot redundant mode for both Up and down

conversion. A test up converter should be capable of providing simultaneous data and

telemetry test injection. A 100 Watt SSPA located near antenna hub should provide uplink

and ensure reliable satellite commanding. An additional SSPA has to be planned in hot

redundant configuration. The powering On and switchable to redundant unit shall be

through remote GUI. The Uplink shall include a Test coupler and down converter for uplink

sampling and transmit inhibit switch for uplink muting. This unit should have built in

monitoring for forward and reverse power. At the transmitter/SSPA output provision should

be made for terminating the power to load or antenna. The transmitter should have

provision to mute automatically for a given azimuth/elevation mask, which can be

programmable. S band transmitter should comply with ITU standards.

The converter should be configured remotely through TCP/IP interface. Both RHCP & LHCP

telemetry signals from feed should be routed to control room through FO link. Then these

two signals are fed to TTC down converter and then to TTC processor through IF Matrix. A

Test Loop Translator is used for long loop tests, translating uplink frequency down to

downlink frequency. For testing the S band downlink a TLT is connected after the SSPA, and

before LNA. TLT output should be switched off during data reception & S band transmission.

Output of TLT should not affect the S band data reception.

TTC Processor

TTC Processor shall demodulate and reconstruct the TM frames. It should receive two

orthogonally polarized 70 MHz down converted signals, pre-detection diversity combine and

carry out Phase, Frequency, BPSK and QPSK demodulation of the carrier. Additional TTC

processor (input) has to be terminated on IF Matrix.

In case of PCM/PM or FM or BPSK or QPSK modulated signals, it has to carryout bit and

frame synchronization and CCSDS decoding (if required). Modulator shall have the provision

for sweeping the carrier with selectable sweep ranges and rates. It shall also accept the


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external simulation signal for modulation. An external noise generator for simulation at 70

MHz shall also be provided.

1) In case of PCM/PSK/PM modulated signals the unit carry out PSK sub-carrier

demodulation, bit and frame synchronization, for two sub-carriers simultaneously

and make both data streams available as formatted and time tagged on a TCP/IP

(100 Base T) bus. The system will have CCSDS standard De-randomizer, Viterbi and

Reed-Solomon Decoders.

2) The uplink module consists of a CCSDS compatible Tele command encoder/

controller for the generation of CCSDS standard and makes it available as formatted

and time tagged data on a TCP/IP Ethernet bus.

3) In the uplink chain, phase or frequency modulate the internally generated range

tones and the Tele command video or the externally provided ISRO standard Tele

command video, either one at a time or simultaneously, on a 70 MHz carrier and the

70 MHz modulated output will be provided for further up conversion. The command

signals and the PSK sub-carrier modulated.

4) A continuous-tone, ranging system, with major tone of 100 KHz and harmonically

related minor tones up to 8Hz, including programmable tones of Intelsat standard,

for the measurement of slant range. It provides the Range rate information, by

measuring the two-way Doppler shift. The range and the range rate data made

available on the TCP/IP bus after formatting and time tagging.

5) The system accepts 5/10 MHz external frequency reference to which all the signal

sources of different functions will be phase locked.

6) The System should accept IRIG-B time or NASA-36 mod. code for time reference

7) The system shall a simulation and testing function, BER measurement with an

internal base band noise source, for internal and long loop checks

8) The system will have local and remote monitor and control through TCP/IP.


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3.2 Antenna Control Servo System

Antenna Control Servo Systems is a Type-2 closed loop position control. It shall contain train

axis with a minimum of 6° wedge with programmable orientation to meet the high

acceleration and critical tracking accuracy requirements of Ka-band. However, wedge with

70 tilt is preferred. The functional block diagram of Antenna Control Servo System is shown

in Figure 2. It should able to switch from PTS to S auto, PTS to X auto, X auto to Ka auto, S

auto to Ka auto based on the AGC levels.

It shall have access both from the control room and antenna pedestal room. The real-time

satellite pass tracking operations are carried out from the control room. All the sub systems

should have Ethernet interface with TCP/IP protocol for remote monitoring and control. It

also should have hand held Local Control Unit during maintenance from the pedestal with

basic facilities like moving the antenna in manual position/ slew mode, enabling/disabling

power to drives, stopping the antenna movement etc. Main functional subsystems are Servo

Control Unit, Antenna Control Unit and Station Control Computer.

3.2.1 Servo Control Unit

Servo Control Unit (SCU) is a software configurable digital controller to implement position,

velocity and torque bias servo loops. In addition to conventional PID control algorithm, it

shall have required hardware and software features to implement the advanced control

features like feed forward adaptive control schemes etc.

SCU has to perform velocity or position command of the EL/AZ axis depending on the mode

selected from ACU. It performs the digital signal processing of servo loop closures for

position, velocity and torque bias loops and converts auto track receiver errors to antenna

control commands. It must be closer to antenna drive system preferably in the pedestal

room itself to improve its reliability. Whenever antenna touches limits, the respective axis

movement should be stopped at first level and switch off motor power, brakes should be

applied at second level. Encoder & limit switch assembly should use precision gearing

mechanism with anti-backlash facility. SCU reads angle from all three axes through absolute

encoder with SSI interface. Apart from above the Servo Control Unit should have provision

to synchronize the system with NTP server/GPS receiver and built in auto track interface to

read analog AGC and tracking errors from tracking receiver. It should have sufficient digital

inputs and outputs along with required interfaces for implementing all interlocks, safety

limits, travel limits, drive status and monitoring sub systems status.

3.2.1.1 AC brushless servo motors

Motors have to be selected based on the antenna torque & velocity requirements through

appropriate gear box ratio after considering the gear box efficiency, stiffness & torque bias

for all the three axes namely AZ, EL and tilt. Each motor should have built in braking facility

for fail safe operation. The resolver/encoder feedback is used to close the velocity loop


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through SCU. They also should have internal thermal switch with cooling option to give

better performance under high temperature conditions.

3.2.1.2 Antenna Drive System

Antenna drive system consists of drives for azimuth, elevation and train axes. Backlash

should be eliminated by using dual drive with torque bias algorithms in azimuth and

elevation axis. Appropriate care must be taken by using either single or dual drive to

remove backlash in train axis. Each digital drive amplifier must be high efficient 3 phase

Space Vector PWM IGBT based power amplifier to drive the brushless AC servo motor as

specified above. The drives must have built in power supply with all protection circuits,

potential free contacts and Ethernet interface with TCP/IP protocol (or any high end

protocol) for Monitoring & Control. Each of these drives should have the capability to

configure it in velocity/torque mode and also should have provision to monitor current,

velocity, faults etc.

3.2.2 Antenna Control Unit

The Antenna Control Unit must perform the following activities from the control room. It

can be a customized hardware with local front panel or standard Computer. Its connectivity

to SCU in the pedestal room is through Fiber optic link and sufficient redundancy has to be

built into the system to avoid single point failures between ACU and SCU. The main

functions of ACU are

Software Configurable servo loops

Provision to compensate systematic errors of antenna mount, droop, tilt etc.

Real-time satellite pass tracking

Program Track simulation without changing system time

Reading current position of the antenna

Filtering of tracking errors received from Tracking receiver

Automatic selection of single/dual drive satellite pass tracking

Mode control logic to activate different acquisition and tracking modes

Hand crank & Stow lock mechanism

S, X, Ka band auto tracking

NTP based Time Synchronization to ACU


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(*) AZ, EL Tracking

errors

Train position

Velocity

Velocity

EL dual motor

EL dual Gear box

Train motor

Train Gear box

Velocity

Station Control Computer (Server)

Client GUI

NTP time (NRSC system)

Safety limits & interlocks

AZ position

EL Position

Antenna Drive unit

AZ dual motor

Servo Control Unit

AZ dual Gear box

Antenna Control unit

Local Control unit

Figure 2: Function Block Diagram of Data Reception Station (Antenna Control Servo System)


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ACU should have following servo modes for accurate positioning or tracking of the antenna

are shown in Table 7. Table 7: Antenna Control servo modes

Mode Description

Stand by Drives are disabled and brakes are engaged

Manual In Manual mode, the brakes are released, the servo drives are

enabled and motor carries current. The axis movement is

electronically geared to the movement of respective (AZ and EL)

hand wheels. Axis will move as long as its hand wheel is moved.

When hand wheel movement is stopped, axis movement too, is

stopped

Slew In Slew mode, the brakes are released, the servo drives are

enabled and motor carries current. The axis speed is commanded

from the movement of respective (AZ and EL) hand wheels. Even

if hand wheel movement is stopped, the axis keeps moving.

Designate In this mode, User can set the target angle and velocity. The

antenna moves to the specified angle with the specified velocity

Auto track Brakes are released, the servo drives are enabled and motor

carries current, and the axis movement is commanded so as to

make the tracking error zero

Program track In this the antenna is moved as per the preloaded trajectory

3.2.2.1 Antenna Control Software

The antenna control software shall track the satellite in real-time either in auto track or in

program track mode. Auto track is the prime mode of tracking and Program track acts as a

backup. It should have provision to trouble shoot the faults, preventive maintenance,

configuration tasks, configuration backup and restore, fault & status monitoring. The main

functions of the software are

Satellite pass tracking (Auto/program track)

Auto sequence mode of operation for satellite pass tracking

Provision to give offsets to Azimuth, elevation and time during Real time

Receiving the pass schedule files from Station Control Computer

Receiving TLE/SV from internet or from any external system

Computing the antenna look angles

Angle transformation for trained antenna position

Display of safety limits, inter locks, sector position with cable wrap indication, AGC

levels, bull's Eye plot for tracking errors, motor and drive status

real-time satellite pass tracking which include

o Loading ephemeris to Servo control before the pass


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o Positioning the antenna to initial look angle and activating program track

before the pass

o Configuring tracking and servo chain sub systems before the pass

o Real-time satellite pass tracking

o Logging of servo and tracking parameters during real-time in CSV format

o Put the antenna into stand-by position at end of pass

o Generating a pass performance report

Utilities to carryout different servo tests like velocity and acceleration tests, gradient

measurements, S curve, step response in PTS and auto track etc.

Utilities to track Sun/moon/star

Event log with time tag

3.2.3 Station Control Computer

Station Control Computer is a rack-mount computer running in Linux. All the station

equipment should have Ethernet interface with TCP-IP or any high end protocol. These units

are connected to SCC server through an Ethernet switch. All the station equipment is

connected to this server though Ethernet switch and its configuration is shown in Figure 3.

It provides a single point of contact for all remote control operations. The User interface is

through client application, running on Windows platform. System should facilitate remote

station operations from NRSC, Shadnagar. The system should have the capability to

integrate some of the additional NRSC/ISRO systems through TCP/IP for making the systems

in full automation mode. The system should have flexibility to integrate into higher level

customer M &C System.

Data & Tracking Down Converters

Tracking Receivers

Data Demodulators

TTC Processor

ACU GUI Feed electronics & LNA

RF Modulator

Matrix Switches

SCC Server

Data & Tracking Up Converters

Network Switch

Figure 3: Station Control Computer Configuration


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It should support complete station operations in a fully automated environment. The main

functions of Station Control Computer are

Multi mission capability for M & C

All configuration files through XML

Pre pass configuration of the station equipment as per Mission configuration file

Scheduling of passes as per the pass schedule files received from FTP server

Initiates real-time satellite pass tracking

Real-time monitoring and control of different sub systems in the station

Logging of monitoring parameters from station equipment at 100 ms

Display of important parameters on GUI

o Eb/No, IF level, carrier lock, clock lock

o Down converter LO frequencies

o Tracking mode, drive status

o Station configuration of tracking and receive chain

o Upcoming Pass information

Post pass analysis and report generation

TTC processors and related units shall be controlled & monitored remotely from SCC.

Automated G/T measurement

Automated pre pass link checks

Event log

Real time monitoring of antenna movement through a camera and showing the

same in user antenna GUI.

Monitoring and logging of the spectrum on the console.

First level inspection/ troubleshooting through built in diagnostic tools.


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3.3 Mechanical Systems

3.3.1 Antenna mechanical system

The Antenna mechanical system broadly divided into the following categories: 1. Antenna assembly and coverage limits

2. Radome requirements

3. Platform for mounting antenna and Radome

4. Cable trench/duct system

3.3.1.1 Antenna assembly and coverage limits

It consists of pedestal, reflector, Sub reflector assembly & feed assembly. The antenna pedestal

shall be designed to withstand heavy winds, earth quakes, vibrations etc. Antenna Reflector

dish is mounted on a 3 axis mount, which can scan the entire sky from -2°. It consists of (a)

Reflector supporting the Feed and Sub-Reflector through a Quadruped/tripod (b) Antenna

mounting frame attaching the Reflector to a pair of Yoke arms with Counter weight arms (c)

Elevation housing containing the necessary drive system for movement about an Elevation

axis between -2° to 182° (d) Azimuth housing containing the drives to achieve ± 360°

rotation about the Azimuth axis.

3.3.1.2 Radome requirements

The proposed antenna should be covered under Radome to withstand extreme weather

conditions of Antarctica. The Radome will be of impedance matching bolting seamless

system. The Radome is of Space Frame Structure and it has to meet the system

specifications with minimum insertion loss in S, X, Ka bands. The Radome has to sit on

existing pile foundation over antenna platform. The Radome shall protect the antenna

system from heavy wind speeds of 250 KM/hour, temperatures of -400 to 200 C. The material

used shall provide structural strength and rigidity. The outer layer of Radome shall be of

hydrophobic to prevent ice accumulation. All the radome panels to be water tight sealed

using silicon Gasket. It shall be equipped with snow rope, aircraft warning lights, interior

lighting etc. There shall not be any heating for the Radome to control the temperature. The

Radome panels should be easily removable for repair & replacement. Two spare panels of

each type are required to be provided along with panel repair kit to carryout maintenance

and problem if any in due course of time.

3.3.1.3 Platform for mounting antenna and radome

The antenna platform has to be built in compatible to the existing pile foundation to match

and mount the antenna as well as Radome. There are 16 Piles out of which 4 Nos. of 50 mm

diameter GEWI Piles which are designed for a Load of 714 KN and 12 Nos. HEA140 section

Piles which are designed for a load of 608 KN. It shall be the responsibility of the vendor to

fabricate the antenna Platform, match and mount the antenna pedestal as well as Radome

on existing pile foundation. The drawing of piles foundation is shown in Figure 4. A Tool kit

has to be provided along with the system for installation as well as for maintenance.


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Figure 4: Details of existing pile foundation


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3.3.1.4 Cable trench/duct System

A suitable Cable trench/duct system of 320 meter length needs to be designed, fabricated,

which is to be erected at the site about 1.5 meter high from the ground, which can

withstand extreme weather conditions of Antarctica. It will be used for laying and routing

power/data cables between the control room and antenna pedestal. This trench may pass

across existing path ways at one or two places. Hence suitable arrangement has to be made

for Underground cable routing.

3.3.2 Antenna Mechanical considerations

Following aspects are to be kept in mind while designing/fabrication of the structural &

mechanical elements of the antenna system.

1. Accessibility, Reliability, Maintenance and fail safe operations

2. Reduce the weight of the reflector and increased stiffness

3. Antenna deflections are to be within the limits of pointing error and reflector RMS

value at specified wind loads and operational temperatures.

4. Compact and rigid design of AZ/EL/Train axis housings.

5. Overall Surface accuracy of the main and sub reflectors.

6. Axis Alignment between Azimuth and elevation

7. Structural deformation due to wind, Temperature and gravity. The reflector back up

structure strength.

8. Structural stiffness of the reflector has to be estimated

9. The Third axis (Three axis mount) accuracy also contributes for the overall pointing

accuracy that can be achieved in the system.

10. Minimum Gear backlash, less thermal deformation of reflector and encoder alignment

directly to the axis shaft to achieve the overall pointing accuracy.

11. Precise fabrication of mechanical components from reputed suppliers with proper

attention to stiffness of reducers, individual component testing and tight quality

control over tolerances specified.

12. The antenna pointing also depends upon precision structure that provide structural

stiffness in wind and low thermal effects, proper mechanical alignments of critical

components which requires care and skill during field installation.

13. Sub-reflector and feed alignment facility shall be provided as per design.

14. Antenna focusing – antenna focus alignment is very sensitive. Photogrammetric and

computer aided algorithm techniques are to be adopted for the antenna alignment

process along with skilled and experienced technician.

15. Total Antenna Error budget for pointing error has to be made and listed. The overall

pointing error should be less than the specification given in the Table 2.

16. The parameters considered for the pointing error should include all the systematic and

random errors and the error budget Table should be provided by the vendor.

17. Pointing error contribution due to the following factors is also to be accounted.


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Deflection of mount, Reflector and sub reflector due to wind and gravity

Deflection due to thermal effect

Slew ring bearing wobble (Thermal protection and Custom built high precision

bearings)

18. The gear box specifications should include stiffness test also, not considering only the

efficiency.

19. The pedestal errors have to be made barest minimum with optimum design and high

precision machining and quality control.

20. Due to high pointing accuracy requirement, high precision fabrication of mechanical

components and sub-assemblies are to be carried. Stringent tolerance specifications

are to be made, measured and accounted properly.

21. Thermal protection and high Slew Ring precision Bearings (SRB) can be used. High

precision Slew Ring Bearings with low bearing wobble are to be chosen.

22. Provisions for lightening arrestors, aviation lamps and other functional apparatus.

3.3.3 Structural analysis

Structural design and analysis of the antenna system, Radome assembly and platform for

supporting Radome assembly and antenna system assembly has to be carried out and the

results are to be presented during Design review. Structural analysis (not limited to the

following and/or other parts as applicable for the supplied system) has to be supplied along

with the Antenna system supplied to NRSC.

1. Reflector panels, backup structure (stiffeners) of Antenna system considering

operational wind speed of 60kmph, survival wind speed of 250 KMPH and inertial

effects of movements in Azimuth & Elevation directions.

2. Quadruped/Tripod structure for sub reflector assembly and X, Y, Z adjustable frame

3. Feed & wave guides structure.

4. Design check of structural elements for the temperature variations of 0 - 50 0C for

differential temperature variations of 5 °C.

5. Azimuth housing, Train axis housing and elevation housing.

6. Counter weights required to balance the antenna about elevation axis.

7. Interface structures like yoke arm, yoke fixing structure, Antenna mounting frame

8. Manual hand cranking system for all the 3 axes.

9. Design of suitable couplings between gear box and motor including selection of

suitable motors.

10. Suitable Slew Ring Bearings for three axes viz. AZ, Train and EL considering

operational and survival wind load factors of antenna and pedestal structure.

11. Appropriate stow lock system for antenna system.

All the supporting structural systems and backup structure of reflector are to be analyzed

and designed considering the following loads.


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1. Gravity load, Inertia load, Wind loads acting at operational speed of 60 KMPH (in

exposed condition) at any angle of attack considering different orientations for every

10° of angle of attack.

2. Temperature stresses on Reflector structure.

3. Forces (drag & lift side) Torque and moments calculations at reflector vertex level, EL

axis level, AZ bearing level, Train axis level and foundation level to be provided for 60

KMPH (operational), 80 KMPH (gusting) and 250 KMPH (for foundation ).

4. Moment of inertia of Antenna system structure when Antenna pointing Zenith and

horizon.

3.3.4 Mechanical Details

The following details are to be shared during Design Reviews 1. Strength calculations of the reflector panel, backup stiffeners, trusses, central hub,

feed can elevation housing, anchor bolts etc. are to be provided

2. Methods used for manufacturing of the different antenna mechanical sub systems

including Radome and platform are to be brought out.

3. Instruments used for measuring critical dimensions and its inspection of different

antenna mechanical sub systems are to be indicated and its test reports are to be

provided

4. Size of the Antenna Dish, Weight of the Antenna, static and dynamic loads of both

the pedestals, antenna load/Force details etc. are to provided

5. Types of lubricants used in the gear boxes and bearings along with their shelf life and

the periodicity for replacement of lubricating oil to be provided

6. All the structural components are to be coated with suitable anti-corrosion type of

paints and its technical details are to be brought

7. Mechanical properties of materials used in design and for fabrication of structural

members to be provided.

8. Estimation of loads for gravity, wind, inertia and thermal are to be done and details

of the same are to be given in tabular form.

9. Weights of different structural members are to be tabulated


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4 Scope of the work NRSC intends to entrust the task of Supply, installation and commissioning of ‘S, X, Ka-band

Data Reception System for LEO satellites’ to vendor on turnkey basis. The scope of the work

includes design, development, supply and delivery of the system up to Cape Town and

installation & commissioning of the system at Larsemann Hills, Antarctica with onsite

warranty for a period of 3 years.

The vendor response to RFP should contain compliance of understanding the RFP

document, detailed proposal containing both technical and price bid, bill of material, vendor

details and project management plan covering design reviews, test plan, installation

schedules etc.

The Supply and installation of ‘S, X, Ka band Data Reception system for LEO satellites' at

Larsemann hills, Antarctica involve (not limited to) the following minimum activities as

under

Design and Development of antenna system (Payload data reception and TTC)

Supply of the antenna system with the proposed hot redundant configuration

Design, fabrication and supply of Antenna platform and Radome

Supply of cable trench/duct

Factory Acceptance Test

Packing & delivery of all the systems up to Cape town

Installation of antenna system, antenna platform, Radome, cable trench and other

outdoor and control room equipment at Larsemann Hills, Antarctica

Onsite Acceptance at Larsemann Hills, Antarctica

Fully automated Station operations

Remote Station operations from NRSC, Shadnagar

Supply of Critical spares as per Annexure-1.

Warranty and Post warranty Comprehensive maintenance

It shall be the responsibility of the vendor to fabricate the antenna Platform, match and

mount the antenna platform as well as Radome on to the existing pile foundation. Also

Vendor shall accept to integrate any additional NRSC/ISRO systems as per the site

requirements. The required licenses for all hardware and software shall be supplied by

the vendor along with the systems. Vendor has to include schedules for Design Review,

Factory Acceptance Test, On Site Acceptance Test, Training, installation plan and any

other important events in their technical bid.

Note: The list of hot redundant systems Referred in Table-3 shall be treated as a part of

the system and hence the cost of these hot redundant systems should be included in base

system cost.


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5 Terms & conditions

5.1 Eligibility Criteria

5.1.1 The vendor as an entity is fully responsible for supply and installation of ‘S, X, Ka-

band Data Reception system for LEO satellites’. In case of multiple parties, the quote

should be from prime vendor and the authorization letter from other parties have to

be submitted along with the quote. However the overall responsibility lies with the

prime vendor.

5.1.2 Vendor should necessarily have the experience in design, installation and

commissioning of 7 Meter or above S/X band full motion LEO antenna (with or

without Ka-band LEO) at polar stations and having proven performance record of

working at such extreme weather conditions as in Antarctica for at least one season.

(Provide/enclose list of installations with address, installation completion and

performance certificate from end user etc.)

5.1.3 Vendor should also have proven experience in design and development of Ka band

full motion antenna systems (provide necessary evidence with respect to design,

simulation results, product realization, System test results, test facility available and

test methodology followed etc.)

5.2 Design Reviews

Vendor has to plan one design review preferably within two months after receipt of

Purchase Order. Vendor shall provide the detailed technical analysis supporting the

specifications/parameters. Necessary documentation has to be supplied at least two

weeks before the scheduled review. Design review shall be conducted at NRSC by a

committee identified by NRSC, Hyderabad. The decision/recommendation of the

committee is final. During these reviews, vendor has to present design analysis /

simulations / test results on

a) Antenna radiation patterns in S, X & Ka bands

b) G/T analysis and performance for data and tracking chains in S, X & Ka bands

c) LNA gain Sufficiency to sustain maximum permissible satellite flux density as per

ITU/ECSS standards without saturation.

d) Predicted RF signal level diagram for complete chain

e) Output IP3 analysis & input and output dynamic range of each subsystem

f) Thermal & Structural analysis for Ka band G/T performance

g) Pointing and tracking accuracy analysis with & without wind loads

5.3 Delivery Schedule and installation

5.3.1 Vendor has to adhere to the following delivery schedule in order to install the

system at Larsemann Hills, Antarctica by the end of Jan, 2018. Generally the Indian

expedition ship to Antarctica leaves from Cape Town during October every year. It

takes about two weeks to reach Larsemann Hills, Antarctica by ship. Sufficient space


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for keeping containers shall be made available at Cape Town by NRSC. The

consignment loading at Cape Town, may take about one week.

5.3.2 The vendor should ensure that the delivery shall be before 30th Sep 2017. The

scheduled delivery date is indicated keeping in view that the expedition to Antarctica

will happen only once in a year i.e. in the month of October. If the delivery is delayed

beyond 30th Sep, 2017 the vendor has to schedule the delivery only in Sep 2018, as

NRSC does not hold any warehouse etc. at Cape Town for Storage. Accordingly the

delivery period may be stated by the vendor.

5.3.3 The System has to be delivered in Full configuration. Part Supply will not be accepted

by NRSC

5.3.4 Transportation of the system from Cape Town, South Africa to Larsemann hills,

Antarctica is the responsibility of NRSC. The vendor shall be responsible for

installation and commissioning of the S, X, Ka-band Data Reception System at

Larsemann Hills, Antarctica. Based on the system delivery 30th Sep 2017/ 30th Sep

2018, the installation of the system will commence in Nov, 2017/2018 and has to be

completed by the end of Jan, 2018/2019 or the end of summer expedition whichever

is later respectively.

5.3.5 Vendor has to meet the following mandatory site requirements during installation at

Larsemann hills, Antarctica

a) NRSC/NCAOR will provide the crane for lifting the equipment at Larsemann Hills,

Antarctica. However, Vendor shall explicitly mention the infrastructure & logistic

support required at Antarctica to accomplish the task.

b) The vendor must indicate number of persons (subject to a maximum of 5 persons)

and duration of their stay at Antarctica for installation of the systems

c) The vendor shall ensure that the site is kept clean during installation and all the

garbage will have to be disposed OFF as per mandatory requirements of Antarctica

treaty

d) Vendor has to follow all the statutory requirements, safety guidelines and provide

the required safety equipment as per Antarctica Charter

e) The safety of working personnel as well as equipment at Antarctica shall be the full

responsibility of the vendor.

5.4 Acceptance Test Plan

The system shall undergo the acceptance tests as per the mutually agreed Acceptance

Test Plan at the vendor’s site (Factory Acceptance Test-FAT) as well as at installation

site (On Site Acceptance Test-OSAT). The agreed test plan has to be circulated at least

two weeks before the schedule. During FAT, the vendor will be responsible to arrange

for the Tests in the presence of NRSC engineers. Vendor should demonstrate the

functionality in its full configuration with satisfactory performance for final acceptance


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at Larsemann Hills, Antarctica. The tentative test plan shall include

a) Antenna test patterns, Beam width & Gain measurement, Cross Polar isolation,

Feed return loss, Tracking sensitivity, System G/T, Frequency response Test,

b) Maximum Velocity & acceleration tests for each axis, Train axis tilt angle

measurement, verification of maximum elevation with train axis, Antenna travel

limits for each axis, Servo inter locks, servo modes, step response, measurement

of tracking accuracy

c) Long Loop BER Test, Real-time Data downlink performance, TTC Performance.

d) Measurement of wobbling and run out in bearings and backlash of gear box in all

the axes, orthogonality between AZ&EL axes, Verticality of AZ axis and

Horizontality of EL axis, Surface profile accuracy of Main and sub reflector,

Mechanical stopper testing, Leveling of AZ Housing with respect to ground,

Alignment of main reflector, feed and sub reflector central axes including tilt and

offset of sub reflector.

5.5 Training & Documentation

The vendor shall provide Training to maximum of 5 member team identified by NRSC

at Vendor’s site as well as at Antarctica. During training vendor has to provide training

material both hard and soft copies to all participants.

Vendor has to plan 5 Day Training program at Factory and it shall focus on Overview of

the system, configuration and its functionality, interfaces, Operational procedures,

Preventive and corrective maintenance etc.

Vendor also has to plan On Site Training during and after installation at Larsemann

Hills, Antarctica. Here the focus on the training is mainly on Operations and

maintenance, troubleshooting during station breakdown etc.

Necessary documentation has to be supplied at least two weeks before the scheduled

reviews like Design Review, OSAT, FAT etc. Vendor shall also provide the complete set

of System manuals, operational and Maintenance manuals both in hard and soft

copies at site during installation.

5.6 Warranty

1. Onsite Warranty shall start after the installation and acceptance of the system at

Larsemann Hills, Antarctica.

2. Warranty shall be provided for a period of 3 years. Vendor quote shall include the

amount for 3 years of warranty as one lot.

3. Vendor shall provide the standard warranty applicable for each of the sub system

from the date of acceptance and it shall include both material and workmanship

4. Any sub system warranty that the OEM provides for greater than the standard

warranty shall be transferred to NRSC without any additional cost.


NRSC/ISRO/INDIA

5. During warranty period the vendor should ensure the system is maintained in

good working condition. The methodology followed by the vendor to ensure the

above has to be clearly indicated in the proposal.

6. NRSC will not insist any On Site Manpower deployment from vendor side during

warranty period. During warranty, vendor has to provide online support for

smooth functioning of station on round the clock basis. However the required

onsite support will be provided by NRSC engineers deputed at Antarctica. To

support the above activity, during warranty

a. Vendor has to provide required training to NRSC engineers who are going to

be deployed at Antarctica for maintenance support every year.

b. During system break down, the available critical spares can be used to bring

the system up.

c. The spares used have to be replaced by the vendor without any additional

charges to NRSC. These spares are to be delivered at Cape Town during

subsequent expedition to Antarctica.

5.7 Comprehensive maintenance

5.7.1 Comprehensive maintenance without man power for a period of two years on yearly

basis after the completion of 3 years of satisfactory warranty period. AMC shall be

concluded if needed by way of separate Purchase Order. The price has to be quoted

as per the Price bid format.

5.7.2 During AMC period the problem has to be attended within 24 hours from the date of

reporting the problem failing which down time compensation at the rate of 0.5% per

day to maximum of 10% shall be levied from your payments. This is in addition to

nonpayment of Comprehensive maintenance charges for delay or break period.

5.7.3 During AMC period the vendor should ensure the system is maintained in good

working condition, including replacement of spares as required without any

additional charges to NRSC.

5.7.4 The vendor has to enclose the maintenance schedules in order to keep the system in

good working condition for continuous data reception.

5.8 Supply of Critical spares

5.8.1 The List of Critical spares referred in Annxure-1 shall be quoted. The cost of these

items will be considered while evaluating price bid for arriving lowest technically

suitable. These spares will be stocked at the Station and are available both during

warranty and Comprehensive maintenance period to ensure the smooth

functionality of the station. However, the vendor should replenish the spares used

before the next immediate expedition without any additional charges to NRSC.


NRSC/ISRO/INDIA

5.8.2 Vendor has to demonstrate the functionality of spares along with the system at

factory during Factory Acceptance Test Plan.

5.9 Visit to Vendor Site

NRSC, during technical evaluation, may decide to visit the facility of the vendor (or any

customer site identified by the vendor) at the cost of NRSC to ascertain their

authenticity and capability. NRSC shall have the right to reject the proposal of the

vendor based on its findings during the visit. The vendor should facilitate the above

visit of NRSC team.

5.10 Payment Terms

NRSC normal payment terms are 90% payment after receipt, installation and

acceptance of the system and balance 10% after submission of performance bank

guarantee. However, if any advance payment is required by the vendor, a maximum of

30% of the cost of items (excluding the installation, warranty and training cost) can be

released against bank guarantee for an equivalent amount from a scheduled bank as

per the format provided by NRSC. Interest will be loaded on advance payment as

applicable on the date of opening of the price bid as per the prime lending rate of

Reserve Bank of India for arriving technically suitable lowest. This bank guarantee shall

be valid till the completion of supply and acceptance of the system. NRSC decision in

this aspect shall be final.

Payment towards Warranty can be released against equivalent bank guarantee only.

5.11 Liquidated Damages

5.11.1 For delays attributable to vendor, Liquidated Damages (LD) shall be applicable at

0.5% of total value for every week delay or part there of subject to a maximum of

10% of the order value shall be recovered. Hence delivery period should be clearly

indicated in terms of months after the receipt of Purchase Order.

5.11.2 LD will not be applicable if the delay is attributed to NRSC or other force majeure

conditions.

5.12 Evaluation criteria

a) Vendor has to fill all the columns in the Compliance statement referred in

Annxure-2

b) Vendor has to go through the RFP document and give the compliance with

respect to complete document and not limited to Compliance Statement

c) Vendor has to fill all the columns in specification template (3 tables)

d) Vendor has to supply the full system and no part supply will be acceptable

e) The total cost of line items 1 to 5 in the price bid will be considered while

evaluating price bid for arriving lowest technically suitable.


NRSC/ISRO/INDIA

5.13 Insurance

Any expenses for the insurance of the equipment from the OEM factory to Cape

Town, South Africa shall not be borne by NRSC and hence, it is the responsibility of the

vendor to ensure safe delivery of the material.

5.14 Arbitration and Jurisdiction

Settlement of disputes shall be through arbitration

a) Arbitration proceedings will be held in Hyderabad, India only. Legal disputes will

be settled through courts in Hyderabad, India.

b) Arbitration: Dispute if any shall be settled mutually failing which it shall be

referred to a one-man- arbitrator appointed by Director NRSC, in accordance with

the arbitration & conciliation Act 1996, whose decision shall be final and binding

on both parties.

c) Jurisdiction: subject to the arbitration clause , the courts in Hyderabad shall be

competent to deal with any matter arising out of the purchase order /contract

5.15 Force Majeure

Neither NRSC nor the supplier shall be liable to the other for any delay in or failure of

their respective obligations under this purchase order caused by occurrences beyond

the control of NRSC or the Supplier (as the case may be) because of fire, floods, power

acts of God, acts of the public enemy, wars, insurrection, sabotage, any law statute or

ordinance Agreement, action or regulations of the Governments or any compliance

therewith similar to the above. Either party shall promptly but not later than thirty

(30) days thereafter notify the other of the commencement and cessation of such

contingency and prove that such is beyond the control and affects the implementation

of this purchase order adversely and if such contingency continues beyond six (6)

months, both parties may mutually agree to discuss and agree upon on equitable

solution for cancellation of this purchase order or otherwise decide the course of

action to be adopted.


NRSC/ISRO/INDIA

Annexure-1: List of critical spares

SL NO Description Spares

1. Ka-band LNA 2

2. X-band LNA 2

3. S-band LNA 2

4. S band Tracking receiver 1

5. X-band tracking receiver 1

6. Ka-band tracking receiver 1

7. IF Matrix 1

8. Digital Phase shifter 1

9. Dual channel Demodulator 1

10. SSPA 1

11. Ka-band Phase commutation / Mono scan converter 1

12. X-band Phase commutation / Mono scan converter 1

13. S-band phase commutation / Mono scan converter 1

14. Dehydrator 1

15. FO receiver & transmitter 1set

16. Antenna Control Unit 1

17. Station Control Computer 1

18. Network switch 1

19. Servo control unit spare kit 1 set

20. AZ/EL/Train Servo motor with brake 2

21. AZ/EL/Train servo amplifier 2

22. Axis encoder 2

23. Torque coupler 1

24. Gear box 1


NRSC/ISRO/INDIA

Annexure-2: Compliance Statement

SL NO

RFP clause No

Brief description of RFP Clause Compliance

Ref page no. in the bid

Remarks, if any

1. 2.1 Dummy price bid in the Technical bid Yes/No

2. Table 1 Vendor details Yes/No

3. 2.4 Enclosing Bill of Materials in technical bid Yes/No

4. 3 capability to track the Low Earth Orbit (LEO) satellites of 400 KM orbit onwards without any keyhole

Yes/No

5. Table 3 Hot redundant Systems Yes/No

6. Table 4 Electrical Specifications Yes/No

7. 3 Operational life of the Data Reception System is expected to be at least 10 years. Vendor shall also ensure the availability of spares during this period.

Yes/No

8. Table 5 Indoor Unit Environmental Specifications Yes/No

9. Table 6 Outdoor Unit Environmental specifications Yes/No

10. 3.1 Supply of Spectrum Analyzer of 3.2 GHz Yes/No

11. 3.1.1 G/T degradation in Ka band due to thermal effects of main reflector and backup structure shall overcome with suitable compensation techniques.

Yes/No

12. 3.1.1 Supply of Dehydrator Yes/No

13. 3.1.2 In Ka-band, in each polarization there will be maximum of three carriers spread over 1500 MHz spectrum.

Yes/No

14. 3.1.2.1 Three Test Up converters are required to perform Long Loop checks in Ka band.

Yes/No

15. 3.1.2.1 Two Test up converters are required to perform Long Loop checks in X-band

16. 3.1.2.2 FO link should have sufficient number of channels to route data IF of all three bands from pedestal to control room and vice versa.

Yes/No

17. 3.1.2.2 IF Matrix should have sufficient number of input and output ports

Yes/No

18. 3.1.2.2 Three Dual channel Demodulators are required to receive data in Ka/X band with one built in RF modulator.

Yes/No

19. 3.1.2.2 Each of the dual channel demodulator unit should have one built in RF modulator for long loop checks.

Yes/No

20. 3.1.3.2 Tracking Receiver should be capable of taking minimum 4 inputs

Yes/No

21. 3.2 6° wedge with programmable orientation to meet the high acceleration and critical tracking accuracy requirements of Ka-band

Yes/No

22. 3.2.3 System should facilitate remote station Yes/No


NRSC/ISRO/INDIA

SL NO

RFP clause No

Brief description of RFP Clause Compliance

Ref page no. in the bid

Remarks, if any

operations from NRSC, Shadnagar.

23. 3.2.3 system should have the capability to integrate some of the additional NRSC/ISRO systems through TCP/IP for making the systems in full automation mode

Yes/No

24. 3.2.3 system should have flexibility to integrate into higher level customer M &C System

Yes/No

25. 3.3.1.2 outer layer of Radome shall be of hydrophobic to prevent ice accumulation

Yes/No

26. 3.3.1.2 No heating elements inside the Radome to control the temperature

Yes/No

27. 5.1.1 In case of multiple party bid, authorization letter other parties to be enclosed

Yes/No

28. 5.1.2 Vendor experience clause for S/X band antenna systems

Yes/No

29. 5.1.3 Vendor experience clause for Ka-band antenna system

Yes/No

30. 5.2 Design review requirements Yes/No

31. 5.3.2 Compliance of delivery schedule Yes/No

32. 5.3.3 System delivery in Full configuration Yes/No

33. 5.3.4 Installation schedule clauses Yes/No

34. 5.3.5 Site requirements at Antarctica Yes/No

35. 5.4 Acceptance Test Plan Yes/No

36. 5.5 Training and Documentation Yes/No

37. 5.6 Warranty clauses Yes/No

38. 5.6 Vendor quote against SL No.3 shall include the amount for 3 years of warranty as one lot. Payment terms for warranty shall be indicated separately.

Yes

39. 5.7 Comprehensive maintenance Yes/No

40. 5.8.1 Vendors quote should include the cost of spare listed in Annexure-1 (SL No. 1 to 24) as per the quantity mentioned against each

Yes/No

Note: Vendor has to go through the RFP document and give the compliance with respect to complete document and not limited to above Table.


NRSC/ISRO/INDIA

Annexure-3: Price Bid format

SL NO Description Cost

1. Supply of S, X, Ka-band Data reception system for LEO satellites

2. Factory Acceptance Tests, System Installation, Onsite Acceptance Tests, Training at Factory and at Antarctica

3. Standard Warranty for 3 years as one lot

4. Annual Comprehensive Maintenance (4th and 5th year)

5. Critical spares