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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
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