Topic: GOES-15 (GOES-West) Yaw Flip Maneuver is scheduled for March 20, 2018

Date/Time Issued: March 12, 2018 M-B1645 UTC

Product(s) or Data Impacted: GOES-15 (GOES-West) Imager and Sounder Data, GOES-13 (GOES-East) Imager.

Date/Time of Initial Impact: M-BMarch 20, 2018 M-B2023 UTC

Date/Time of Expected End: March 22, 2018 0044 UTC

Length of Outage: 1 hour for maneuver (2023 UTC - 2129 UTC); 27 hours and 15 minutes for recovery period (March 20, 2018 2130 UTC - March 22, 2018 0044 UTC).

Details/Specifics of Change: GOES-15 (GOES-West) will be performing a Yaw Flip Maneuver for one hour on Tuesday, March 20, 2018 from 2023 UTC through 2129 UTC. M-B There is no back up date for this maneuver.M-B It will need to be conducted during a critical weather day. M-BA recovery period will follow immediately and last until March 22, 2018 at 0044 UTC.M-B During the recovery period, routine imager and sounder scans will be performed; however, the navigation may still be out of specifications until the end of the recovery period. No GOES-15 (GOES-West) RSO requests will be approved during the maneuver/maneuver recovery period.

If NWS Regions have any operational concerns, please contact the NCEP SDM (301) 683-1500 at least 6 hours prior to the maneuver time. There is no backup date for the Yaw Flip.

GOES-16 (GOES-East) will continue to run Mode 3, which has a 15 minute Full Disk cadence, in support of the GOES-15 outage. M-B

On March 21, 2018 0800-1100 UTC, the following images and soundings will be shortened or replaced due to navigation constraints during eclipse.

Images:

0815 UTC PACUS replaced with 0819 UTC SUBCONUS

0845 UTC PACUS replaced with 0849 UTC SUBCONUS

0900 UTC Full Disk replaced with 0900 UTC Full Disk short

0945 UTC PACUS replaced with 0949 UTC SUBCONUS

1015 UTC PACUS replaced with 1019 UTC SUBCONUS

1045 UTC PACUS replaced with 1049 UTC SUBCONUS

Soundings:

0801 UTC Limited CONUS replaced with 0801 UTC short CONUS

0924 UTC N. Pacific replaced with 0924 UTC Limited N. Pacific

1024 UTC N. Pacific replaced with 1024 UTC Limited N. Pacific

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

Web Site(s) for applicable information:

See http://www.ssd.noaa.gov/PS/SATS/messages.html for this and other satellite related messages.

See http://www.ospo.noaa.gov/Operations/GOES/schedules.html for full GOES scanning schedules and scan sectors.

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