Update #2: As of March 04, 2026, the VIIRS Day-Night Band (DNB) Focal Plane Annealing test, VIIRS Mid-Mission Outgassing (MMOG) test, and TCS Propellant Tank Heater Setpoints Test will not be conducted. If these tests are rescheduled, an updated ESPC notice will be issued.
Topic: Suomi National Polar-orbiting Partnership (S-NPP) Spacecraft Testing
Date/Time Issued: March 04, 2026 2144z
Product(s) or Data Impacted: All S-NPP Products
Date/Time Initial Impact: February 25, 2026
Date/Time of Expected End: N/A
The ATMS Dwell test was added to this test schedule April 8, 2026 through April 13, 2026. The new schedule is shown below
ATMS Video Test | February 25, 2026 - Completed |
VIIRS Detailed Activity Schedule (DAS) Constraint Test | April 6 - April 7, 2026 |
ATMS Dwell | April 8-13, 2026 |
ADCS GPS Test | May 1, 2026 |
ATMS Interference Test | May 19, 2026 |
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.
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Subject Line: Administrative: Suomi National Polar-orbiting Partnership (S-NPP) Testing starting February 25, 2026 - Issued February 19, 2026 1450 UTC
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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