Update #1: On February 25, 2026, the ATMS Video Test will temporarily enable diagnostic packets to allow ATMS timing, synchronization data, and Video test channel data to be transmitted. This test will generate additional diagnostic data over one orbit between rev #74262 with AOS 16:54:57 UTC and rev #74263 with AOS 18:33:16 UTC. This test has no impact on ongoing science observations.

Topic: Suomi National Polar-orbiting Partnership (S-NPP) Spacecraft Testing

Date/Time Issued: February 19, 2026 1450 UTC

Product(s) or Data Impacted: All S-NPP Products

Date/Time Initial Impact: February 25, 2026

Date/Time of Expected End: N/A

Length of Outage: Variable based on test

Details/Specifics:

OSPO will be conducting a series of tests on Suomi National Polar-orbiting Partnership (S-NPP). These activities are timed to ensure no interference with the 2026 hurricane season, which spans June 1, 2026 - November 30, 2026.

Key Dates:

* Testing Campaign: February 2026 – May 2026

* Hurricane Season Start: June 1, 2026

* Hurricane Season Ends: November 30, 2026

The full list of planned testing activities and their specific execution dates is provided below:

ATMS Video Test	February 25, 2026
VIIRS Day-Night Bands (DNB) Focal Plane Annealing Test	March 17, 2026
VIIRS Mid-Mission Outgassing Test	March 31 - April 2, 2026
VIIRS Detailed Activity Schedule (DAS) Constraint Test	April 6 - April 7, 2026
TCS Prop Tank Heater Setpoints Test	April 27 - April 30, 2026
ADCS GPS Test	May 1, 2026
ATMS Interference Test	May 19, 2026

Contact Information: Please contact User Services at SPSD.userservices@noaa.gov

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