Options for Data Distribution in the GOES-R Series

GOES User Conference

SESSION 5

Peter Woolner / Mitretek

“Data” Types

• GOES Re-Broadcast (GRB)

• SEM & SXI

• Instrument of Opportunity (IOO)– e.g., SEI, Volcam, etc.

“Data” Types (CONTINUED)

• Low Rate Information Transmission (LRIT)

• Emergency Managers Weather Information Network (EMWIN)

• Data Collection System (DCS)– DCPR and DCPI

• Search and Rescue Satellite Aided Tracking (SARSAT)

GOES Re-Broadcast (GRB)

– Currently the “GVAR” data stream from the Imager and Sounder

• Level-1B Data . . . Calibrated and Earth-located IR, and Normalized and Earth-Located Visible

– GRB will be generated from the ABI & ABS (or GIFTS) as Level-1B Data Set

• May be various ‘flavors’ of GRB (high-rate and low-rate)

• GRB may NOT contain ALL ABI/ABS Data

GRB Option #1

• High rate GRB 17.6 Mbps– ABI (all data) 7.0 Mbps– ABS Radiance (all data) 10.0 Mbps– ABS Products 0.6 Mbps

• Low rate GRB ABI & ABS 4.0 Mbps

GRB Option #2

• High rate GRB ABI & ABS 10.6 Mbps– ABI (all data) 7.0 Mbps– ABS Radiance 3.0 Mbps– Principal Data Components (x4 reduction factor)– ABS Products 0.6 Mbps

• Low rate GRB ABI & ABS 4.0 Mbps

GRB Option #3

• High rate GRB ABI & GIFTS 72.6 Mbps– ABI (all data) 7.0 Mbps– GIFTS Radiance (all data) 65.0 Mbps– GIFTS Products 0.6 Mbps

• Low rate GRB 4.0 Mbps

GRB Option #4

• High rate GRB ABI & GIFTS 23.6 Mbps– ABI (all data) 7.0 Mbps– GIFTS Radiance 16.0 Mbps– Principal Data Components (x4 reduction factor)– GIFTS Products 0.6 Mbps

• Low rate GRB ABI & GIFTS 4.0 Mbps

GRB Option #5

• High rate GRB ABI & GIFTS 14.6 Mbps– ABI (all data) 7.0 Mbps– GIFTS Radiance 7.0 Mbps– Principal Data Components (x10 reduction factor)– GIFTS Products 0.6 Mbps

• Low rate GRB ABI & GIFTS 4.0 Mbps

GRB Communication Links

• Options 1 and 2– All Downlinks L-Band (1672-1698)

– Option 2 Only Needs 1672 to 1695 MHz

• Options 3, 4, and 5– High Rate GRB X-Band (7450-7550)

– All Other Downlinks L-Band

• Put High and/or Low Rate GRB on Commercial Satellite Link (C-Band)

• Modulation Types and Bandwidth’s Vary with Option

GRB Communication Links (CONTINUED)

• Downlink Freq. Band:As identified in the options• Polarization: Linear N-S• Coverage: Earth hemisphere

– to a minimum elevation of 5 degrees• User Data Rate: As identified in the options• RF Data Rate: Contractor specified (at PDR)• Data Format: NRZ-S• Modulation: Contractor specified (at PDR)• FEC Coding: Contractor specified (at PDR) • Bandwidth: Contractor specified (at PDR)• Required BER: 1 in 106

• Downlink EIRP: Contractor specified (at PDR)• Ground G/T: 15.2 dB/K at L-band

TBD at X-band

“GVAR” to GRB Transition

• GVAR continues as long as a GOES-I/Q spacecraft is operational

• GRB becomes active with GOES-R

• Creation of Pseudo-GVAR is being considered to aid transitions during the period when there is one GOES-I/Q spacecraft and one GOES-R spacecraft operational

Multi-use Data Link (MDL)

• SEM, SXI, and Instruments of Opportunity

• Spacecraft performance data– e.g., star trackers, dynamic interaction tools, etc.

• Copy of PCM Health & Safety Telemetry

• Intend to Include with Sensor Data

MDL Transition

• No Transition Period Planned

• Operational with GOES-R

• Becomes Part of Sensor Data

LRIT Communications Link• Downlink Frequency: 1693.4 MHz

– (3 MHz higher for Option 1 and possibly 3, 4, 5)• Polarization: Linear N-S• Coverage: Earth hemisphere

– to a minimum elevation of 5 degrees• User Data Rate: 256 kbps• Data Format: NRZ-M• Modulation: QPSK• FEC Coding: Convolutional

– Rate ½, Constraint length K=7 and R-S (223, 255)• Bandwidth: 600 kHz • Required BER: 1 in 108

• Downlink EIRP: 57 dBmi• Ground G/T: -0.3 dB/K

LRIT Transition

• No Transition Period Planned

• Frequency Change

• Modulation Change (QPSK vs BPSK)

• Data Rate Growth– Product Suite Expansion

EMWIN Communications Link• Downlink Frequency: 1692.7 MHz

– (3 MHz higher for Option 1 and possibly 3, 4, 5)• Polarization: Linear N-S• Coverage: Earth hemisphere

– to a minimum elevation of 5 degrees• User Data Rate: 56 kbps• RF Data Rate: 128.2 kbps• Data Format: NRZ-L• Modulation: BPSK• FEC Coding: Convolutional

– Rate ½, Constraint length K=7 and R-S (223, 255)• Bandwidth: 256.4 kHz • Required BER: 1 in 106

• Downlink EIRP: 54 dBmi to 53 dBmi – maximum variation due to all causes

• Ground G/T: -0.3 dB/K

EMWIN Transition

• No Transition Period Planned

• Frequency Change (Except Option 2)

• NO Modulation or Coding Change

• Data Rate Growth – 9.6 Kbps to 56 Kbps– Product Suite Expansion

DCPR Communications Link• Downlink Frequency: 1694.3 - 1694.7 MHz

» or 1694.6 to 1695.0 MHz \» or 3 MHz higher for Option 1 and possibly 3, 4, 5

• Polarization: Uplink: RHC, Downlink: Linear N-S

• Channels: Up to 200 channels 1.5 kHz wide, and 33 channels 3 kHz wide

– (2 adjacent 1.5 kHz channels will be allocated for 1200 bps)• Coverage: Earth hemisphere

– to a minimum elevation of 5 degrees• User Data Rate: 100, 300, and 1200 bps • Data Format: NRZ-L• Modulation: Bi-phase (±60O), and

8PSK with Trellis Codulated FEC

• Bandwidth: 500 kHz• Required BER: 1 in 106

• Downlink EIRP: 52 dBmi• Uplink EIRP: (TBD)• Ground G/T: 15 dB/K

DCPI Communications Link • Uplink Frequencies: 2034.9125 (West),

2034.900 (East), or 2034.8875

(spare) MHz• Downlink Frequencies: 468.8375 (West),

468.8250 (East), or 468.8125 (spare)

MHz• Polarization: Uplink: Linear N-S,

Downlink: RHC• Channels: One at a time• Coverage: Earth hemisphere

– to a minimum elevation of 5 degrees• User Data Rate: 100 bps• Data Format: NRZ-L• Modulation: Bi-phase (±60O)• Bandwidth: Excess bandwidth factor of 1.00• Required BER: 1 in 106

• Downlink EIRP: 45 dBmi• Uplink EIRP: (TBD)• Ground G/T: -29 dB/K

DCPR/DCPI Transition

• No Changes affecting DCPs• Retains 300 bps and 1200 bps DCPs• Possible L-Band Frequency Change to the DRGS

• Considering allowing CDMA – Operates transparent to current users

– Perhaps as many as 100 new “Channels” in the ‘noise’

SARSAT Communications Link

• Uplink Frequencies: 406.01 – 406.09 MHz1645.65 MHz (acknowledge

channel)• Downlink Frequencies: 1544.5 MHz +/-0.1 MHz

1544.1 MHz (acknowledge to beacon)

• Polarization: Uplink & Downlink: RHC• Channels: One at a time• Coverage: Earth hemisphere

– to a minimum elevation of 5 degrees• User Data Rate: 400 bps• Data Format: NRZ-L• Modulation: Bi-phase (±60O)• Bandwidth: Excess bandwidth factor of 1.00• Required BER: 1 in 105

• Downlink EIRP: 45 dBmi• Uplink EIRP: 5-watts• Ground G/T: 6 dB/K

SARSAT Transition

• NONE

• New capability for acknowledgment to the beacon