Update #3: The GOES-17 (GOES-West) ABI Mode 3 Cooling Timeline Implementation was inadvertently started at 0610z versus 0600z. The ABI Mode 3 timeline was resynced February 26, 2020 at 0645z to the correct 15 minute cadence.

Update #2: This is the final reminder for the GOES-17 (GOES-West) ABI Mode 3 Cooling Timeline Implementation M-bM-^@M-^S Scheduled to Commence February 26, 2020 from 0600-1200 UTC.M-B A link to GOES Schedules and Scan Sectors was added below.M-B

Update #1: This is a reminder for the GOES-17 (GOES-West) ABI Mode 3 Cooling Timeline Implementation M-bM-^@M-^S Scheduled to Commence February 26, 2020. Please note there was an error in the timestamps below and are corrected in red.M-B

Topic: GOES-17 (GOES-West) ABI Mode 3 Cooling Timeline Implementation

Date/Time Issued: February 26, 2020 0715Z

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

Date/Time of Initial Impact: February 26, 2020 0600 UTC

Date/Time of Expected End: March 01, 2020 1200 UTC

Length of Event: 6-hours each day from 0600 UTC to 1200 UTC and lasting from February 26, 2020 through March 01, 2020.M-B The same timeline will occur seasonally in operations for four periods each year.M-B See details below.

Details/Specifics of Change: GOES-17 ABI is going to commence permanent operational implementation of the Mode 3 Cooling Timeline starting on starting Wednesday, February 26, 2020 through Sunday, March 01, 2020 in order to mitigate the number of saturated images resulting from the loop heat pipe (LHP) temperature regulation anomaly.M-B The timeline will occur for 6 hours, centered on spacecraft midnight from 0600 UTC to 1200 UTC each day. The same timeline will occur seasonally in operations for four periods each year.M-B Here are the next four full periods, which will repeat each year with minor adjustments based on future GOES-17 ABI thermal models:

April 09, 2020 - May 01, 2020
August 12, 2020 - September 01, 2020
October 14, 2020 - October 31, 2020
Dates for 2021 are yet to be determined, but will be shared prior to January, 2021.M-BM-B

M-B

The timeline will operate in Mode 3 (M-bM-^@M-^\Flex Mode 3M-bM-^@M-^] uploaded as timelineID=3) where GOES-17 ABI will generate a single full disk once per 15 minutes and generate one mesoscale domain sector each minute. Alternating MESO domains will be collected one time each per two minute period. The CONUS domain will not be scanned during the timeline as those periods will be used for cooling.

Full Disk product availability will occur every 15 minutes with timestamps of HH:00, HH:15, HH:30, and HH:45 (with HH:00 representing data collected from HH:00 through HH:15 and HH:15 representing data collected from HH:15 through HH:30, etc.) for each hour from 0600-1200 UTC on February 26, 2020M-B through March 1, 2020.M-B Mesoscale domain sector availability will alternate each minute between the two mesos (e.g. HH:00 for MESO1, HH:01 for MESO2, HH:02 for MESO1, HH:03 for MESO2).M-B GOES-17 ABI will continue its capability to handle domain sector requests during the cooling timeline period. Nominal Mode 6 operations will resume at 1200 UTC on each day of cooling timeline operations.M-B INR and radiometric calibration will be maintained throughout the cooling timeline periods of activation.M-B The data availability from each distribution service is provided below in a format of M-bM-^@M-^\Distribution Service: Data AvailabilityM-bM-^@M-^].M-BM-B

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AWIPS (Advanced Weather Interactive Processing System):M-BM-B

- 15 minute SCMI (Sectorized Cloud and Moisture Imagery) for Full Disk

- 2 minute SCMI for mesoscale domain sector M-bM-^@M-^\MESO1M-bM-^@M-^] and M-bM-^@M-^\MESO2M-bM-^@M-^]M-B

- 15 minute SCMI for Alaska sector (subset from Full Disk)

- 15 minute SCMI for Hawaii sector (subset from Full Disk)

GRB (GOES Rebroadcast):M-BM-B

- 15 minute L1b Radiances Full Disk

- 2 minute L1b Radiances for mesoscale domain sector M-bM-^@M-^\MESO1M-bM-^@M-^] and M-bM-^@M-^\MESO2M-bM-^@M-^]M-B

PDA (Product & Distribution Access System):

- 15 minute L1b Radiances Full Disk

- 2 minute L1b Radiances for mesoscale domain sector M-bM-^@M-^\MESO1M-bM-^@M-^] and M-bM-^@M-^\MESO2M-bM-^@M-^]

- 15 minute Level 2 CMI Full Disk

- 2 minute Level 2 CMI for mesoscale domain sector M-bM-^@M-^\MESO1M-bM-^@M-^] and M-bM-^@M-^\MESO2M-bM-^@M-^]M-B

- All other Level 2 (non-CMI) Full Disk and mesoscale domain sector M-bM-^@M-^\MESO1M-bM-^@M-^] and M-bM-^@M-^\MESO2M-bM-^@M-^] products will be produced but may have varied degradation for the duration of the cooling timeline and up to 30 minutes *after* nominal Mode 6 resumes.

HRIT/EMWIN (High Resolution Information Transmission / Emergency Managers Weather Information Network):M-B 30 minute Level 2 CMI Full Disk will be broadcast at HH:11 and HH:41.M-B The mesoscale domain sectors M-bM-^@M-^\MESO1M-bM-^@M-^] and M-bM-^@M-^\MESO2M-bM-^@M-^] will be broadcast.M-B Level 2 non-CMI products will be broadcast during the defined cooling timeline period, but may have varied degradation for the duration of the cooling timeline.

GNC-A (GEONETCast-Americas):M-B GNC-A broadcast of 15 minute Level 2 CMI Full Disk imagery will be distributed at HH:01, HH:16, HH:31, and HH:46.M-B All Level 2 non-CMI products will not be broadcast during the defined cooling timeline period.

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The GOES-17 ABI Mode 3 cooling timeline implementation is planned to occur despite Critical Weather Day declaration. These cooling timeline 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 the cooling timeline.M-B

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

Web Site(s) for applicable information:

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

GOES Schedules and Scan Sectors: https://www.ospo.noaa.gov/Operations/GOES/schedules.html

See GOES-17 ABI performance website at https://www.goes-r.gov/users/GOES-17-ABI-Performance.html

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