Update #1: On March 20th, 2024, at 17:07:45 UTC, NOAA-20 will execute a propulsive maneuver to begin the rephasing campaign.
Topic: NOAA-20 Rephasing Maneuver Burn Planned for March 19th and 20th 2024
Date/Time Issued: March 13, 2024 2049z
Product(s) or Data Impacted: All NOAA-20 L1 Sensor Data and downstream L2+ Data
Date/Time of Initial Impact: March 19th and 20th, 2024
Length of Outage: See Details and Special Note below.
Details/Specifics of Change: On March 19th and 20th, 2024 NOAA-20 will perform a sequence of propulsive maneuvers as part of an orbit rephasing effort to provide 180 degree separation between NOAA-20 and NOAA-21. The following observatory systems will be affected by the NOAA-20 rephasing activities on March 19th and 20th 2024:
CERES in Contam-Safe mode, science data will not be available for 2:22:44 per each maneuver
OMPS in Decon mode, Science data will not be available for 0:41:44 per each maneuver
HRD will be turned off; therefore, data for direct broadcast users will be unavailable for 0:44:44 per each maneuver sequence
NOAA-20 will be pointing off-nadir for 0:34:44 , collected data during that time period data may be impacted and not disseminated
All of the above times are approximate and subject to change
Special Note: Adherence to +/- 20 km ground track error will be violated while rephasing since
GTE is maintained via consistent orbital altitude/period. This requirement will
have to be relaxed during rephasing.
Equator crossing time should be relatively maintained during phasing (13:30 +/- 10
min), preserving consistent lighting conditions during the drift period.
The drift period will last approximately 16 days, and may be subject to change due to maneuver spacecraft performance outcome or space environment factors. The satellite will remain in mission point with all instruments on during the drift period.
Another propulsive maneuver will conclude the drift period and end the rephasing campaign. Further details will be disseminated via an ESPC update notice as those details become available.
Contact Information for Further Information: ESPC Operations at ESPCOperations@noaa.gov and 301-817-3880.
Web Site(s) for Applicable Information: N/A
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