GOES-8 to GOES-12 Transition

Direct Readout Conference

Cindy Hampton

NESDIS/Office of Satellite Operations

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Agenda

• Background

• Operational Transition Requirements

• Schedule

• Start Up Activity

• Product Transition

• Issues and Concerns

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Background

• GOES-8 Launched April 13, 1994 • GOES-8 Last Inclination maneuver:

December 2002– Partial maneuver due to amount of fuel remaining– Inclination requirement exceeded in April 2003: + 0.5

degrees

• GOES-12 launched in July 2001 and currently in storage mode at 105W.

Sept 2, 1994GOES-8

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Operational Transition Requirements

• Minimal impact to users: no requirement to re-point GVAR antennas

• Provide sufficient testing period to evaluate GOES-12 performance by OSDPD, OSO and users

• Maintain continuous GOES-12 GVAR once has returned to normal on-orbit mode.

• A single switch for users from GOES-8 to GOES-12 GVAR

• Minimize RF interference during transition

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SOCC Schedule• Return GOES-12 to On-orbit mode: January 9• Perform GOES-12 yearly north-south maneuver:

January 14• Start GOES-12 Eastward Drift from ~110W towards

75W (~0.4 deg per day): January 17• Turn on Solar X-Ray Imager (SXI) High Voltage Power

Supply and begin Imaging: January 21• Perform Image Navigation and Registration (INR)

Recovery: January 20-24• Provide GVAR for user testing during drift: January 24-

March 31

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SOCC Schedule• GOES-12 reaches ~ 81W: March 31

– Perform swap of GOES-12 GVAR data for GOES-8 as GOES-East using GOES-8 GVAR transponder.

• GOES-8 data would be available as backup via a ground patch.

• Continue GOES-8 – normal housekeeping schedule

• GOES-12/GOES-8 Cross Over: April 20

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SOCC Schedule

• Stop GOES-12 drift at 74.5W: April 22– Communication Services switch over (e.g. WEFAX, EMWIN,

DCS, SARSAT)

• Start GOES-8 westward drift maneuver towards 105W: April 24– GOES-12 Imagery outage for ~2 hours due to

RF command interference. GOES –10 Full Disk

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Start Up ActivityJanuary 9-24

• Scan Mirror Contamination Avoidance

• Outgassing if required

• Radiometric Calibration with ORA

• INR Start up

• SXI High Voltage Turn On– Scanning with sun by slewing solar array

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GOES-12 Product Testing• Products previously tested during NOAA Science Test

Held from September 23, 2001 through October 27, 2001– Change in imager resolution and spectral bands resulted in

more extensive product implementation and testing• 4km Channel 5 (12.0 µm) replaced with 8km Channel 6 (13.3 µm)

• Resolution on Channel 3 (6.7 µm) improved from 8km to 4km

– GOES-12 data continued through December 16, 2001

– Data ingested and products created and tested in conjunction with ORA (Office of Research and Applications)

– GOES-12 placed in storage December 20, 2001

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Ingest Capability – Prior to 03/31/03

• Imager and sounder data to be made available– NESDIS – SSD, ORA

– NWS – NCEPs, N-AWIPS, AWIPS (test bed)

• External users will be able to access GVAR data directly from GOES-12 prior to March 31, 2003– NCEP - AWC, TPC via own antennas

– Private companies – i.e. WSI, AccuWeather

– Other Direct Readout Customers

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Product Readiness

• Primary NWS Usage – AWIPS

• AWIPS Readiness– Successful stream testing during NOAA Science Test with NWS

Test Network Control Facility (TNCF – McLean, VA)

– All AWIPS builds can handle GOES-12 Changes

– Plans for additional final testing during move of GOES-12 prior to March 31, 2003

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Product Readiness• GOES Products Ready Include:

– Winds, Radiances, Imager and Sounder ASOS SCP (Automated Surface Observing System Satellite Cloud Product), AutoEstimator, Sounder DPI (Derived Product Imagery), Remapped Imagery: AWIPS, N-AWIPS and McIDAS (Man computer Interactive Data Access System), WEFAX / LRIT, SST (Sea Surface Temperature), CSBT (Clear Sky Brightness Temperature, experimental)

• GOES Products Discontinued Due to Band 5 to 6 Changes:– Imager DPI, and some volcano products

• All used internally within SSD. Replacement products available

• GOES Products Planned Readiness: – GSIP (GOES Solar Insulation Product) code by Dec from ORA– ABBA (Advanced Biomass Burning Algorithm) code by Dec from CIMSS

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GOES 8 to 12 TransitionG12 Station Δ, ~0.40 deg/day (~75 days)

Eclipse Season

G12 Return To On-Orbit Mode1/9/03

GOES 8 Drift to 105W

Feb MarJan MayApr Jun

Provide GVAR For Test1/24/03

Swap GOES 8 GVAR With GOES 123/31/03

GOES 12Reaches 75W4/22/03

SXI Turn On1/21/03

Delivery of Winds & RadiancesProducts by 02/14/03

All GOES-12 Products Tested and Validated 03/07/03

Additional AWIPS Testing

All GOES - East Products Produced from GOES-12 03/31/03

CommServicesSwitchedTo GOES-124/22/03

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For more information:For more information:GOES-8 to GOES-12 Transition PlanGOES-8 to GOES-12 Transition Plan

http://www.oso.noaa.gov/goes/index.htmhttp://www.oso.noaa.gov/goes/index.htm