1 RFI Attachments January 13, 2003

2 General Assumptions Satellite Constellation: –Geostationary Earth Orbit –East Position – 75 o W Longitude (Sat A and Sat B) –West Position – 135 o W Longitude (Sat A and Sat B) –Central Position – 105 o W Longitude – Storage and Contingency Operations –Inclination – 0 o o Mission Life: –7.5 yrs operational –7.5 yrs combined terrestrial and on-orbit storage – up to 5 yrs for either Mission Launch Readiness Date: April 2012 Technology Readiness Level at PDR: TRL 6

3 GOES R Distributed Architecture Notional Baseline Satellite A – One each in East and West –ABI –SXI –Services Satellite B – One each in East and West –HES –SEM –Services Total instrument and comm payload complement with contingency per each A&B satellite Mass – 450 Kg Power – 500(?) W

4 General Assumptions (cont) Instruments –GFE –Instrument contractors responsible for Sensor Module thermal designs –Instrument data rates include data compression Spacecraft –Spacecraft contractor responsible for communication payload transponders and magnetometer boom –Spacecraft must be capable of performing yaw flip –X-band raw data downlink; L-band re-broadcast

5 Notional Baseline Instruments ABI - Advanced Baseline Imager – 16 channels HES – Hyperspectral Environmental Suite –Multi-function suite meets sounding mission and some imaging capabililities –DS – Disk Sounder (supports global and synoptic models) –SW/M – Severe Weather/Mesoscale (supports mesoscale models) –CW – Coastal Water (ocean color imaging) SEM – Space Environment Monitor SXI – Solar X-Ray Imager

6 Notional ABI Features: –Full Disk Imaging Scan Mode 3 lossless compression; Scan Mode 4 lossy compression (5 minutes full-disk images) Spatial resolution: 0.5 – 2.0 km (band dependent 16 Channels –Active or Passive cooling Mass: 275 kg –Sensor Module – 170 kg; E-Module – 50 kg; Margin 55 kg Power: 450 W; 100% duty cycle Volume: –Sensor Module – 1.45m (EW) x 1.15m (NS) x 1.50m (Nadir) –E-Module – 0.4m (EW) x 0.4 (NS) x 0.65 (Nadir) Data Rate: 60 Mbps

7 Notional ABI (cont.) 16 channel ABI 2 visible bands 14 IR bands 3 Defined Image Sectors –Full Disk –CONUS –Mesoscale Full Disk –Imaging area is degree circle centered at nadir –Includes the full Earth disk contained within a degree circle centered at nadir plus an additional imaging allowance of 0.36 degrees beyond equatorial diameter –Nominal ~ 12,000 Km diameter circle frame size CONUS –Nominal size: ~ 5000 Km wide x ~ 3000 Km high (if frame is at nadir) Mesoscale –Nominal size: ~ 1000 Km x ~ 1000 Km (if frame is at nadir) 2 Defined Imaging Modes –Mode 3 with 1 Full disk, 3 CONUS, and 30 Meso Sectors each 15 minute imaging cycle –Mode 4 with 3 Full disk and 30 Meso Sectors each 15 minute imaging cycle Level-1 Pixel Characteristics –Visible pixel FOV = 14 mr square pixels (nominally 0.5 Km at nadir) –IR pixel FOV = 28 mr square pixels (nominally 2.0 Km at nadir) No other frames/frame sizes are presently defined; but other imaging frames may be defined by the instrument provider

8 Notional ABI (cont.) Scan Mode 3 –Also referred to as “Normal” Operations – The ABI concurrently acquires (i.e., interleaves) Full Disk (FD) image in 15 minute + 30 seconds intervals CONUS image in 5 minute + 30 seconds intervals which may be extracted from the FD if scan timing permits Mesoscale images in 30 second + 5 second intervals Star sense every 15 minutes Scan Mode 4 – Referred to as “Optional Mode” Operations – The ABI concurrently acquires (i.e., interleaves) Full Disk (FD) image in 5 minutes + 30 seconds intervals Mesoscale images in 30 seconds + 5 second intervals Star sense every 15 minutes Data Timeliness – Maximum data output delays from ABI Full Disk Swath: 3 minutes (180 seconds) CONUS: 15 seconds Mesoscale: 10 seconds

9 Notional HES Features: 2 instrument suite DS/SW/M –Full Disk Soundings; 1 hr revisit 62 o LZA; Spatial Resolution – 10km IR, 1km Vis –SW/M – 1000 x 1000 km 4 min revisit; Spatial Resolution – 4 km IR –~1900 channels –Active or Passive cooling CW –Coastal coverage of the US coasts in 1 hour –14 channels from – um –Passive cooling

10 Notional HES (cont.) Mass: –DS/SW/M – 200 kg –CW – 80 kg Power: –DS/SW/M – 450 W; 100% duty cycle –CW – 100 W; 100% duty cycle Volume: –DS/SW/M Sensor Module – 1.5m (EW) x 1.3m (NS) x 1.0m (Nadir) E-Module – 0.4m (EW) x 0.2m (NS) x 0.5m (Nadir) –CW – 1.00m (EW) x 1.00m (NS) x 1.00m (Nadir Data Rate: –DS/SW/M – 65 Mbps –CW – 2.6 Mbps

11 GOES-R Hyperspectral Environmental Suite (HES) Functional Data Processing Overview Losslessly Compressed HES Sensor Data (SD) Downlink Determine Earth Location Level 1B Dataset consisting of: Earth located, calibrated radiances Prepare to Insert in GRB-L Uplink Interface GRB-L Users Shaded background: GOES-R Ground System Scope GRB-L Uplink NOTE: Observing allocation is one full disk view each 60 minutes where the full disk earth view is constrained to 62 o local zenith angle. Ingest & Decompress HES SD Transform or Deconvolve to Spectral Radiances ~ 1800 BIP Radiances Calibrate Radiances ~ 1800 Calibrated Radiance Temperatures Raw Data from HES

12 GOES-R Hyperspectral Environmental Suite (HES) Sounding Measurement Overview HES Fixed Grid 62 0 Local Zenith Angle Scans For Full Earth Disk (GOES-East view) IR HES Channel Square Pixels (112  r) ~ 4.0 Km x 4.0 Km IFOV at nadir One HES Dwell Sounding “Spot” (Reference: HES TRD, July 2002) Red line bounds the 62 0 local zenith angle Sounding Region 880 bins for 650 – 1200 cm -1 waveband 960 bins for 1650 – 2250 cm -1 waveband Interferometric Sounder Binning 145 bins for um LW1 145 bins for um LW2 290 bins for – 8.13 um LW3 290 bins for um MW1 Dispersive Sounder Binning 28  r 112  r One Hyperspectral Binning “Cube” 290 bins for um MW2 Note: 1 Each GIFTS Interferometer pixel has a 4kmx 4km resolution at nadir Each proposed Dispersive Spectrometer pixel has a 10km x 10km resolution at nadir * See Note 1. Plus: One 1km visible band Plus: Two 1km visible bands

13 Notional ESXI (cont.) Features: –Continuous solar imaging –42 arcmin x 42 arcmin sensor FOV Mass: 50 kg Power: 200 W; 100% duty cycle Volume: –0.28m (EW) x 0.77m (NS) x 0.21m (Nadir) Data Rate: 2.8 Mbps

14 Notional SEM Energetic Particle Detectors (EPS) - Monitor the proton, electron, and alpha particle fluxes SensorMass Power VolumeData Rate MAGPD 40 kg (Total) 11 W 26.5 x 34 x 29.5 cm200 bps (total) (Magnetospheric proton detector) MAGED 9.5 W 26.5 x 34 x 29.5 cm (Magnetospheric electron detector) EPEAD East 7 W 17 x 29 x 25 cm (Energetic proton, electron and alpha particle sensor detector) EPEAD West 7 W 17 x 29 x 25 cm (Energetic proton, electron and alpha particle sensor detector) HEPAD 6.5 W 17 x 28 x 14.5 cm (High energy proton and alpha particle detector) Common EPS CPU 39 W22 x 22 x 13 cm Magnetometer - Magnetic field measurements Outboard2 kg 2 W7.2 x 7.2 x 9.5 cm150 bps Inboard2 kg 2 W7.2 x 7.2 x 9.5 cm150 bps XRS / EUV - Detects the beginning of solar flares and estimates the magnitude of associated solar-terrestrial disturbances X-Ray Sensor & Extreme UV10kg 10 W34 x 22 x 22 cm 60 bps

15 Communications Links

16 Data Distribution & Services Options Baseline: DCP(I/R), SARSAT, LRIT, Moderate Rate Re- Distribution of Data & Products (GOES Re- Broadcast GRB) via GOES satellite Full Data Stream sent to limited sites with further subscription services as an option

17 Sensor Data Stream Requirements Available data rate from Instruments to the spacecraft: < 100 Mbps as measured over any 1 second interval Downlink Protocol: CCSDS with FEC Downlink Packet Format: not specified Data Compression –ABI IR detector data shall be losslessly compressed –ABI Visible data may be compressed using lossless or lossy techniques –Compressed ABI visible data must meet Peak SNR –HES detector data shall be losslessly compressed –SXI and SEM data shall not be compressed

18 GOES R Baseline Architecture Planning Schedule