Topic: NOAA-21 VIIRS Non-Roll Lunar Calibration Scheduled for May 26, 2026

 

Date/Time Issued: May 22, 2026 1417Z

 

Product(s) or Data Impacted: NOAA-21 VIIRS Data

 

Date/Time of Initial Impact: May 26, 2026 16:26:35Z

 

Date/Time of Expected End: May 26, 2026 16:31:41Z

 

Length of Outage: See Details.

 

Details/Specifics: On May 26, 2026, NOAA-21 VIIRS will perform a Lunar Calibration without a spacecraft roll maneuver, centered at 16:29:08Z. Only VIIRS science data will be impacted while VIIRS encoder offset and gain are set for Moon observation.

 

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