GAGAN &NavIC Applications Overview

Broadcasting GAGAN Signal through

GSAT-8 (PRN127) &GSAT-10 (PRN128)

GAGAN

GAGAN

PRN127

GSAT8

55.0E

GAGAN

PRN128

GSAT10

82.0E

INDIA – 4th Country in the world to haveSBAS

NRSC User Interaction Meet – 2018

NavIC

S. Muralikrishnan, NRSC

GAGANGPS Aided Geo Augmented Navigation

Non-aviation applications

Improved coordinates with better accuracy

Cadastral resurvey

Reclassification of Forest boundaries

Mining boundary mapping &monitoring

2.5D modelling

Hyperlapse imaging

Rail track gradient Analysis

•To provide Satellite Based Augmentation Services (SBAS) over Indian & neighboring regions.

• Enhanced navigation performance to civil aviation through Integrity Accuracy Continuity & Availability

Augmentation -SBAS

– Accuracy is Not Sufficient

– Availability and Continuity

Why augmentation?

What is augmentation?

Improve integrity via real time

monitoring

Improve availability and

continuity

Improve accuracy via

corrections

Clock Errors Orbit Errors

Sat. Geometry

Ionosphere

Troposphere

Multipath

Receiver Noise

Error Budget(m)GPS SBAS

Ephemeris 2.5 0.4

Clock 2.0 0.2

Troposphere 0.5 0.5

Ionosphere 5.0 0.2

Multi-path 1.0 0.1

Rx Specific 3.0 0.2

UERE 6.7 0.7

Accuracy (95%) 6.0 1.1

Point Captured location

Point Captured using On board mobile GPS

Point Captured using GAGAN dongle

Ground Control Point Library (GCPL)

• Geometric calibration of satellite / platform

• Triangulation1 of Satellite/Aerial Data for the generation of DEM2 and Ortho3 data.

• The need for GCPs were discussed during early Nineties.

• Has become a part of IRS programme for IRS-P5(stereo).

• First of its kind in India to collect GCPs from GPS survey all over India.

• Location analysis with varying occupation

• Observation of 30 min in static position on a point provided 50cm(1σ)

• 3 tier client server database

1 – Triangulation is the process of determining the location of a point by measuring angles to it from known points at either end of a fixed baseline, which will help to densify the control points.

2 – Digital Elevation Model : Grid with Geographic location and height information3 – Ortho Data corrected for terrain and tilt angle.

Role of Ground Control Points

GCPL Design

GCP Schema

1.5m 3m 2m 4m

2m 4m 2.5m 5m

Scatter Plots: GAGAN SBAS Data (30 minutes observation)

Assam

Odhisa

Karnataka

Gujarat

• The objective of the study is to demonstrate the usefulness of GAGAN for Cadastral mapping.

• Pilot study along with Telangana State Dept. Shabashpallevillage, ShivampetMandal, Medakdistrict,Telangana State.

• Area = 1600 acres

Existing :

Total Sy No’s = 350

Surveyed: 70 yrs back

Gagan Cadastre:

No. of polygons = 540

Area = 1600 acres

Cadastral Resurvey - GAGAN

Gagan dongle connected to laptop & attached to cap Land records verified in the presence of land owners and officials Data evaluation & Attribute data collection

Cadastral Resurvey - GAGAN

Stop & Go Kinematic

Due to industrialization

Old

New

Survey numbers split into sub

parcels due to inheritance

Bigger parcels for

investment

Sy. No.

Total Station

(acres)

GAGAN

(acres) % Diff.

50 2.626 2.611 0.59

87 5.154 5.109 0.87

119 7.592 7.501 1.19

130 8.458 8.309 1.76

321 1.702 1.703 0.08

323 0.421 0.425 0.87

Average 0.8

GAGAN survey - Validation

• Geospatial Inventory of all notified 3658 heritage sites

• Preparation of site management plans

Activity I: Geodatabase Creation

Prohibited Protected Regulated Zones

Ease of doing Business

G2G Application : App

Activity II: Location based services & Mobile appsG2C Application : Smart Citizen App for online request processing

Empower ASI field Staff to Collect• The Geocoordinates of Sites and Monuments• Generate any Admin/Management Boundary

around a site/Monument

Applicant’s point

Database ready & available on Bhuvan

Smartphone based Android application

• Dual Option GPS GAGAN Inbuilt GPS

Inventory & Site Mng plans for Heritage Sites and Monuments of National

Importance

2007-2011 2007-2015

Year Overburden volume

(Cu.m)

Cut volume

(Cu.m)

2007-11 172290.8 1717464.2

2007-15 253520.6 4238248.3

GAGAN MINE BOUNDARY MAPPING

Reconciliation & Generation of Centralized GIS database of Notified

Forests

User:Karnataka State Forest Dept.

Heritage Light-5

Others mobile apps to improve position information:

• Bhuvan CCLA app to geo-tag Telangana Govt. leased land parcels using Bluetooth GAGAN receivers.

• Bhuvan Waqf app to map the properties of Waqfboard using USB GAGAN receivers.

• g-Girdavari app to map the property boundary of Agriculture lands using USB GAGAN receivers.

Mobile app with GAGAN Bluetooth Device

GAGAN with Bluetooth

• GAGAN enabled SBAS receiver was used in the updation of transportation network features.

• Eg. bridges, flyovers etc., into existing large scale spatial databases.

PVNR Elevated Expressway

Map updation - Bridges / Flyover Models using GAGAN SBAS

Suggested Methods GAGAN/NavIC and

DEM from Cartosat-1

Pilot Study: Trail run from Sec.bad to

Kazipet (135km) using receivers

• GNSS

• NavIC

• GAGAN

CartoDEM

GNSS/GAGAN/NavIC

Conclusion: Gradient variation of 1% is observed

using these techniques w.r.t Ground data.

Preamble: All gradient data of track is in physical form. Need digital gradient data

for inputting to microprocessor based speed control

GOLD ( Guidance for Optimized Locomotive Drive) for Railways

Six Camera system with GAGAN(Street View)

Capable of imaging in 3600

GAGAN HYPERLAPSE

It provides two basic services as under

Standard Positioning Service (SPS) for

common users Restricted Service (RS) for special authorized

users

The IRNSS service is transmitted on L5 (1164MHz) and S(2483MHz) bands

Advantages of NavIC

Greater flexibility for Defence and Aviation users

GAGAN + IRNSS will give more accurate position

The IRNSS receiver yields a position fix with a 3D RMS value in 4-6m accuracy

All the time six satellites are visible

Sky plot of NavIC satellitesDate: January 10,2018

NavIC Applications

NavIC receivers have been in use for the following applications

• Launch Vehicle Missions (PSLV/GSLV)• Earth Station Range operation Time Synchronization• Messaging application for Fisherman (PFZ,Emergency,Boundary)• Vehicle tracking System (Payload Tracking for Last 2 payloads was

successfully done using this)• Marine Navigation

NavIC Applications

1

2

3

4

1. Receiver 2.Mobile3. Power Back up 4.NavIC

Training to fishermen

Primary Means of Navigation - Take-Off,En Route, Approach and LandingMore Direct Routes - Not Restricted By Location of Ground-Based EquipmentPrecision Approach Capability - At Any Qualified AirportDecommission of Older, Expensive Ground-Based Navigation Equipment

Reduced/Simplified Equipment On Board AircraftIncreased Capacity - Reduced Separation Due to Improved Accuracy

GAGAN system provides NPA (Non Precision Approach) services of RNP-0.1(required nav performance) over Indian FIR and PA (Precision Approach) services of APV-1.0/APV-1.5 (Approach with Vertical guidance) over Indian landmass with effect from December 30, 2013 and May 19, 2015 respectively.

• 30,80,130 & 55,110

• SAC/ISRO has developed FPGA(field prog gate array) based 36 Channel Hardware receivers (SPS & RS) supporting IRNSS L5, IRNSS S and GPS-L1 and 2 GAGAN Channels.

• 19 channel FPGA based receivers have been developed for Vehicle tracking applications.

• Single channel and multichannel messaging receivers have been made.