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Update #2: A GOES-17 ABI cooling timeline test will commence at 1100 UTC and run through 1200 UTC. This phase 1 test is a variation of Mode 4 (continuous full disk without CONUS or mesoscale domain sectors) operations with a 5-minute full disk scan (formatted and populated as nominal Mode 4 output) followed by 25 minutes of star looks and IR calibrations. This 30 minute pattern will then be repeated one more time for a total of a 60-minute test. Upon conclusion of the one hour test, GOES-17 ABI will return to nominal Mode 6 operations including the ability to make mesoscale domain sector requests. ^M

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Update #1: This is a clarification to the original notification. The AWIPS distribution will include not only 30 minute SCMI (Sectorized Cloud and Moisture Imagery) for Full Disk and CONUS sectors, but also 30 minute SCMI for Alaska (AK) and Hawaii (HI) sectors. During Mode 4, the CONUS, AK, and HI sectors are all subsets from the Full Disk.^M

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Topic: GOES-17 (GOES-West) ABI Cooling Timeline Test

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Date/Time Issued: October 15, 2019 1047 UTC

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Product(s) or Data Impacted: GOES-17 ABI Imagery and Level 2 Products

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Date/Time of Initial Impact: October 15, 2019 1100 UTC

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Date/Time of Expected End: October 15, 2019 1200 UTC

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Length of Event: 1 hour

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Details/Specifics of Change:

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A two-phase test is planned to investigate whether modifying the GOES-17 (GOES-West) ABI scan pattern during periods of high thermal loading would decrease the number of saturated images currently resulting due to the loop heat pipe anomaly. For phase one, GOES-17 ABI will execute one hour of Cooling Timeline Test activities.M-B The test will be a variation of Mode 4 (continuous full disk without CONUS or mesoscale domain sectors) operations with a 5 minute full disk scan (formatted and populated as nominal Mode 4 output) followed by 25 minutes of star looks and IR calibrations. This 30 minute pattern will then be repeated one more time for a total of a 60 minute test.M-B Upon conclusion of the one hour test, GOES-17 ABI will return to nominal Mode 6 operations including the ability to make mesoscale domain sector requests. INR and radiometric calibration will be maintained throughout the data outage.M-BM-B

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A follow-on, phase two, 6-hour test is tentatively planned for four consecutive days (October 18-21, 2019) from 06:00-12:00 UTC on each of the four days.M-B During the 6-hour test periods, this same cycle of a 5 minute full disk scan followed by 25 minutes of star looks and IR calibrations will be repeated continuously.M-B

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For both phases of the test, product availability will occur every 30 minutes with timestamps of HH:05 (representing data collected from HH:00 through HH:05) and HH:35 (representing data collected from HH:30 through HH:35).M-B The specific product time stamps for October 15, 2019 will be 11:05, 11:35 UTC with Mode 6 resuming at 12:00 UTC. The specific time stamps for October 18, 2019 through October 21, 2019 will be at 06:05, 06:35, 07:05, 07:35, 08:05, 08:35, 09:05, 09:35, 10:05, 10:35, 11:05, 11:35 UTC with Mode 6 resuming at 12:00 UTC. The data availability from each distribution service is provided below in a format of M-bM-^@M-^\Distribution Service: Data AvailabilityM-bM-^@M-^].

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AWIPS (Advanced Weather Interactive Processing System):M-B 30 minute SCMI (Sectorized Cloud and Moisture Imagery) for Full Disk and CONUS sectors

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GRB (GOES Rebroadcast):M-B 30 minute L1b Radiances Full Disk

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PDA (Product & Distribution Access System):

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- 30 minute L1b Radiances Full Disk

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- 30 minute L1b Radiances CONUS (subset from Full Disk)

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- 30 minute Level 2 CMI Full Disk

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- 30 minute Level 2 CMI CONUS (subset from Full Disk)

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- All other Level 2 (non-CMI) products will be either not produced or severely degraded for the duration of the test and up to 30 minutes *after* mode 6 resumes.

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HRIT/EMWIN (High Resolution Information Transmission / Emergency Managers Weather Information Network):M-B 30 minute Level 2 CMI Full Disk will be distributed, but all Level 2 non-CMI products will not be broadcast during the defined test period.

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GNC-A (GEONETCast-Americas): GNC-A broadcast of 30 minute Level 2 CMI Full Disk imagery will be distributed at HH:11 and HH:41.M-B GNC-A broadcast at HH:01 and HH:31 will not include ABI data. All Level 2 non-CMI products will not be broadcast during the defined test period.

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These test activities are specific to ABI.M-B All other GOES-17 spacecraft and instrument (EXIS, GLM, Magnetometer, SEISS, SUVI) activities will remain nominal for the duration of these tests.M-B These test activities are subject to cancelation or delay in the event of Critical Weather Day (CWD) declarations.M-BM-B

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If NWS Regions have any operational concerns, please contact the NCEP SDM (301) 683-1500.

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Contact Information for Further Information: ESPC Operations at ESPCOperations@noaa.gov or 301-817-3880

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Web Site(s) for applicable information:

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See https://www.ospo.noaa.gov/Operations/messages.html for this and other satellite related messages.

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This message was sent to ESPC.Notification@noaa.gov. You have been sent this and other notifications because you have opted in to receive it. If for any reason, you wish to unsubscribe, please contact ESPC Help Desk at ESPCOperations@noaa.gov or (301) 817-3880. Please note: it may take up to two business days to process your unsubscribe request.

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