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Published byFrederick Hunter Modified over 9 years ago
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Options for Data Distribution in the GOES-R Series GOES User Conference SESSION 5 Peter Woolner / Mitretek
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“Data” Types GOES Re-Broadcast (GRB) SEM & SXI Instrument of Opportunity (IOO) –e.g., SEI, Volcam, etc.
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“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)
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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
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GRB Option #1 High rate GRB17.6 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
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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
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GRB Option #3 High rate GRB ABI & GIFTS72.6 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
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GRB Option #4 High rate GRB ABI & GIFTS23.6 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
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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
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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 DownlinksL-Band Put High and/or Low Rate GRB on Commercial Satellite Link (C-Band) Modulation Types and Bandwidth’s Vary with Option
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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 10 6 Downlink EIRP:Contractor specified (at PDR) Ground G/T:15.2 dB/K at L-band TBD at X-band
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“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
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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
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MDL Transition No Transition Period Planned Operational with GOES-R Becomes Part of Sensor Data
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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 10 8 Downlink EIRP:57 dBmi Ground G/T:-0.3 dB/K
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LRIT Transition No Transition Period Planned Frequency Change Modulation Change (QPSK vs BPSK) Data Rate Growth –Product Suite Expansion
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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 10 6 Downlink EIRP:54 dBmi to 53 dBmi –maximum variation due to all causes Ground G/T:-0.3 dB/K
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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
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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 (±60 O ), and 8PSK with Trellis Codulated FEC Bandwidth:500 kHz Required BER:1 in 10 6 Downlink EIRP:52 dBmi Uplink EIRP:(TBD) Ground G/T:15 dB/K
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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 (±60 O ) Bandwidth:Excess bandwidth factor of 1.00 Required BER:1 in 10 6 Downlink EIRP:45 dBmi Uplink EIRP:(TBD) Ground G/T:-29 dB/K
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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’
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SARSAT Communications Link Uplink Frequencies:406.01 – 406.09 MHz 1645.65 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 (±60 O ) Bandwidth:Excess bandwidth factor of 1.00 Required BER:1 in 10 5 Downlink EIRP:45 dBmi Uplink EIRP:5-watts Ground G/T:6 dB/K
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SARSAT Transition NONE New capability for acknowledgment to the beacon
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