MSG 2 lost by SpaceTrack

From: Gerhard HOLTKAMP (grd.holtkamp@t-online.de)
Date: Tue Feb 26 2008 - 19:49:46 UTC

  • Next message: Björn Gimle @GlocalNet: "Geoflare season"

    	
    State vectors for MSG 1 (2002-040B), MSG 2 (2005-049B), METEOSAT 6 (1993-073B) 
    and METEOSAT 7 (1997-049B) are available directly from flight dynamics of 
    Eumetsat in the following way:
    
    http://www.eumetsat.int/Home/Main/Access_to_Data/Meteosat_Image_Services/Satellite_Status/index.htm 
    
    Then go to the left-hand side of the page, "Orbital Parameters" (and there are 
    also instructions to subscribe to the state vector distribution service - but 
    you can access the data right away without subscribing).
    They are generally updated on Mondays.
    
    I took the most recent state vectors (epoch 25-FEB-08, 0 UTC) and checked them 
    against Spacetrack TLEs. While MSG 1, METOSAT 6 and 7 agree quite well I 
    found a whopping 1100 km difference for MSG 2 between the Eumetsat and the 
    Spacetrack positions. Looking more closely the Spacetrack TLEs for MSG 2 seem 
    to be stuck at epoch 30-JAN-08. MSG 2 has performed two NS maneuvers on 
    4-FEB-08 and 5-FEB-08. It looks like Spacetrack missed out on those maneuvers 
    and has sort of lost track of MSG 2.
    
    Gerhard HOLTKAMP
    Darmstadt, Germany
    
    
    -------------------------------------------------------------------------
    Subscribe/Unsubscribe info, Frequently Asked Questions, SeeSat-L archive:  
    http://www.satobs.org/seesat/seesatindex.html
    



    This archive was generated by hypermail 2b29 : Tue Feb 26 2008 - 19:54:59 UTC