Update #3: The NOAA-21 VIIRS outgassing activity was completed on February 28, 2024.
The NOAA-21 VIIRS instrument was placed in operational mode on February 27, 2024, at 21:00 UTC. OMPS was placed in operational mode on February 28, 2024, at 15:37 UTC.
NDE/PDA requests for NOAA-21 VIIRS and OMPS products will be enabled once Cal/Val evaluation is completed.
While NOAA-21 High Rate data (HRD) is available, Direct broadcast (DB) users are advised that this NOAA-21 science data is not yet cleared for operational use.
Correction to Update #2: The NOAA-21 VIIRS instrument was placed in activation mode on February 27 at 21:00 UTC. This science data is not considered valid until the instrument is returned to fully operational mode and has been assessed by Cal/Val teams.
While this NOAA-21 VIIRS Science data is available through High Rate Data (HRD), Direct broadcast (DB) users are advised that this is not yet cleared for operational use.
Update #2: The NOAA-21 VIIRS instrument was placed in active mode on February 27 at 21:00 UTC. This science data is not considered valid until the instrument is returned to fully operational mode and has been assessed by Cal/Val teams.
While this NOAA-21 VIIRS Science data is available through High Rate Data (HRD), Direct broadcast (DB) users are advised that this is not yet cleared for operational use.
Update #1:The NOAA-21 VIIRS Mid-Mission Outgassing Activity will commence on February 26, 2024, at 14:22 UTC.
Expected Science data outages:
OMPS: February 26, 2024, 14:22:02 UTC - February 28, 2024, 15:39:40 UTC
VIIRS: February 26, 2024, 16:05:21 UTC - February 28, 2024, 13:57:45 UTC
VIIRS Data will need to be validated after returning to nominal temperature levels.
If a Critical Weather Day is declared before the activity begins, it will be canceled. If a declaration is made after the activity starts, we will complete it.
Topic: NOAA-21 VIIRS Mid-Mission Outgassing Activity Scheduled from February 26, 2024 to February 29, 2024
Date/Time Issued: February 27, 2024 2223Z
Product(s) or Data Impacted: JPSS NOAA-21 VIIRS and OMPS Sensor Data
Date/Time of Initial Impact: February 26, 2024 00:00Z
Date/Time of expected End Time: February 29, 2024 23:59Z
Duration: 4 Days
Details/Specifics of change: On February 26, 2024, NOAA-21 will start a Mid-Mission Outgassing Activity as a routine procedure before the satellite is declared as the primary JPSS spacecraft later this year. During this activity, VIIRS will be in Outgassing Mode, and OMPS will be in DECOM (decontamination mode). The end time of the activity is approximate, and an updated notice will be issued during the course of the activity.
The following observatory systems will be affected on February 26, 2024:
February 26, 2024 00:00Z – February 29, 2024 23:59Z, OMPS will be in DECOM (decontamination mode) and science data will not be available
February 26, 2024 00:00Z – February 29, 2024, 23:59Z, VIIRS will be in Outgassing Mode, science data will not be available