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RFI Attachments

January 13, 2003

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General Assumptions

• Satellite Constellation:– Geostationary Earth Orbit– East Position – 75o W Longitude (Sat A and Sat B)– West Position – 135o W Longitude (Sat A and Sat B)– Central Position – 105o W Longitude – Storage and Contingency

Operations– Inclination – 0o + 0.5o

• 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

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GOES R Distributed ArchitectureNotional 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

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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

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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

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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

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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 17.76 degree circle

centered at nadir– Includes the full Earth disk

contained within a 17.40 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

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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

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Notional HESFeatures:• 2 instrument suite• DS/SW/M

– Full Disk Soundings; 1 hr revisit 62o 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 0.412 – 0.905 um– Passive cooling

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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

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GOES-R Hyperspectral Environmental Suite (HES) Functional Data Processing

Overview

Losslessly CompressedHES Sensor Data (SD)

Downlink

Determine Earth

Location

Level 1B Dataset consisting of:Earth located, calibrated radiances

Prepare toInsert in GRB-LUplink Interface

GRB-L Users Shaded background:

GOES-R Ground System Scope

GRB-LUplink

NOTE: Observing allocation is one full disk view each 60 minutes where the full disk earth view is constrained to 62o

local zenith angle.

Ingest& Decompress

HES SD

Transform orDeconvolve to

Spectral Radiances

~ 1800 BIP Radiances

CalibrateRadiances

~ 1800 CalibratedRadiance TemperaturesRaw Data from HES

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GOES-R Hyperspectral Environmental Suite (HES) Sounding Measurement

OverviewHES Fixed Grid

620 Local Zenith Angle Scans For Full Earth Disk

(GOES-East view)

IR HES ChannelSquare 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 the620 local zenith angle

Sounding Region

880 bins for 650 – 1200 cm-1 waveband

960 bins for 1650 – 2250 cm-1 waveband

Interferometric Sounder Binning145 bins for 15.40-12.54 um LW1

145 bins for 12.54-10.54 um LW2

290 bins for 10.53 – 8.13 um LW3

290 bins for 8.44-6.78 um MW1

Dispersive Sounder Binning

28 r

28 r

112 r

112 r

One Hyperspectral Binning “Cube”

290 bins for 7.08-5.84 um MW2

Note: 1Each GIFTS Interferometer pixel has a 4kmx 4km resolution at nadir Each proposed DispersiveSpectrometer pixel has a 10km x 10km resolution at nadir

* See Note 1.

Plus: One 1km visible bandPlus: Two 1km visible bands

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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

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Notional SEMEnergetic Particle Detectors (EPS) - Monitor the proton, electron, and alpha particle fluxes Sensor Mass Power Volume Data RateMAGPD 40 kg (Total) 11 W 26.5 x 34 x 29.5 cm 200 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 W 22 x 22 x 13 cmMagnetometer - Magnetic field measurements Outboard 2 kg 2 W 7.2 x 7.2 x 9.5 cm 150 bpsInboard 2 kg 2 W 7.2 x 7.2 x 9.5 cm 150 bps

XRS / EUV - Detects the beginning of solar flares and estimates the magnitude of associated solar-terrestrial disturbances X-Ray Sensor & Extreme UV 10kg 10 W 34 x 22 x 22 cm 60 bps

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Communications LinksChannel Uplink (MHz) Downlink (MHz) User Data Rate BER Comments

SD N/A 8240 - 8400 ~ 90 Mbit/s(Combined) 1 X 10-5 (FER)

QPSK with coding if adequate BW.8PSK and 16QAM if needed

GRB-F 8175-8215* 1689 ~ 24 Mbit/s TBDModulation depends on allocated BW but is likely either 8PSK or 16 QAM.

BW Available is 12 MHz.

GRB-L 8175-8215* 1677.1 4.2 Mbit/s 1 X 10-6Corresponds to PDR on

GOES N-Q. NOAA specifically wants QPSK modulation

EMWIN 8175-8215* 1695.7 56 kbit/s 1 X 10-6 25 kbit/s for GOES N-Q

LRIT 8175-8215* 1696.4 256 kbit/s 1 X 10-8 Increases from 128 kbit/s on GOES N-Q

DCPR 401.9 or 402.2 1697.5 or 1697.8

100, 300, 1200 bit/s 1 X 10-6

Incremental Improvements.

DCPI 8175-8215*468.8125 Spare468.8250 East468.8375 West

100 bit/s 1 X 10-6

Incremental Improvements.

SAR 406.01 - 406.09 1544.5 400 bit/s 1 X 10-5

Incremental Improvements.Command

(On Orbit) 8175-8215* N/A 4 kbit/s(Corrected 7-29) 1 X 10-5

Telemetry(On Orbit)

N/A 1697 8 kbit/s(Corrected 7-29) 1 X 10-5

* - 7190-7235Mhz is a possible alternate to 8175-8215Mhz

Frequencies and formats under review

Source: NOAA TRD for GOES-R Communications Links, NOAA RF Spectrum Petition to NTIA for new allocations, coodrdination with NOAA

       8215-8240 MHz is a guard band       All Auxiliary links relocated to 1695-1698MHz which is 3MHz higher than that of GOES N-Q       SD transmit and GRB receive will likely be the same steerable antenna

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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

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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

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GOES R Baseline ArchitecturePlanning Schedule