POES Engineering User Notification Form


New      Update    Date: April 18, 2021   Version #:              


Planned Event    Emergency/Anomaly 


Topic:  Metop-A Collision Avoidance In-Plane Maneuver



Date/Time (UTC) Message Issued:  April 21, 2021 0239Z



Product(s) Involved/Affected:  All products from AMSU-A, ASCAT, ATOVS, GRAS, IASI, MHS, AVHRR in the Metop Global Data Service and Regional Data Service were temporarily degraded.  GOME-2 and SEM products were not available.



Date/Time (UTC) Initial Implementation: 

April 18, 2021 (JDAY 108) 11:25 UTC



Date/Time (UTC) Expected End: 

April 18, 2021 (JDAY 108) 16:29 UTC



Length of Outage:  ~ 5 hours


Details/Specifics of Change:       

A Metop-A Collision Avoidance In-Plane Maneuver was performed April 18, 2021, preheating beginning at 11:48 UTC with the maneuver ending at 13:30 UTC that same day.


This maneuver was to avoid collision with FENGYUN 1C DEB (object number 32193).


The SEM instrument was placed into Maneuver Mode at 11:25 UTC on April 18, 2021 and returned back to its Normal Operating Mode at 16:29 UTC that same day. 


The GOME instrument timeline ends and mirror parked before the burn at 12:12 UTC on April 18, 2021.  The GOME timeline was reactivated at 15:30 UTC that same day.


Data from the outage period will not be recovered nor distributed.  


Contact Information for Further Information: 

ESPC Help Desk at ESPCOperations@noaa.gov at 301-817-3880


Spacecraft Affected:  NOAA-15   NOAA-18   NOAA-19 Metop-A Metop-B



Web Site(s) for Applicable Information: 

See http://www.ssd.noaa.gov/PS/SATS/messages.html for this and other satellite related messages.
http://www.eumetsat.int/website/home/Satellites/CurrentSatellites/Metop/index.html for more information Metop satellites