Topic: NOAA-21 Star Tracker Photo Mode Scheduled for January 23, 2025


Date/Time Issued: January 21, 2025 1956Z

Product(s) or Data Impacted:  All NOAA 21 Sensor Data

Date/Time of Initial Impact:  January 23, 2025 19:16:22Z

Date/Time of Expected End: January 23, 2025 19:50:26Z


Length of Outage:  See Details.

Details/Specifics of change: On January 23, 2025, NOAA-21 will perform a spacecraft attitude maneuver for the Star Tracker Photo Mode Calibration, keeping star tracker 1 pointed at Harvard Catalog Star 2920. Science data may be impacted while the spacecraft is pointing off-nadir during the attitude maneuver.  The timeline of events for this maneuver are provided below.

The following observatory systems will be affected on 2025 January 23:

19:16:22Z – 19:50:25Z X-band RF (HRD) will be turned off
19:16:26Z – 19:47:19Z NOAA-21 will be pointing off-nadir, collected 
Stored Mission Data (SMD) data will be impacted and should not be disseminated. 


Web Site(s) for Applicable Information: 

Sdm Sdm Total Operational Weather Readiness - Satellites (TOWR-S) Virtual Lab Forum http://vlab.noaa.gov/web/towr-s/mmm/-/message_boards/view_message/42357980 VLab.Notifications@noaa.gov


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