Re: GFO satellite

From: Mike McCants (mmccants@io.com)
Date: Fri Dec 19 2008 - 20:11:24 UTC

  • Next message: Bob Christy: "Re: GFO satellite"

    http://ilrs.gsfc.nasa.gov/satellite_missions/list_of_satellites/gfo1_general.html
    
    "On about September 25, 2008, the GFO-1 went into safe mode, and into a
    non-nadir pointing attitude. The spacecraft team attempted to recover the
    satellite, but the aged condition of the batteries and other spacecraft
    systems have made the recovery and return to normal operations impossible.
    Mission operations have terminated."
    
    The nominal orbit was something like this:
    
    1 25157U 98007A   08185.17697379 0.00000000  00000-0  00000-0 0    08
    2 25157 108.0689 260.7135 0001000 190.1149 169.8851 14.31511464    02
    
    Based on observations over a 4 day arc, the orbit changed by
    1 or 2 seconds/day on or about Oct 22:
    
    1 25157U 98007A   08305.23032623 0.00000000  00000-0  47482-3 0    02
    2 25157 108.0669 147.4055 0003000 313.1259  46.8741 14.31487526    06
    
    It is certainly possible that other changes in the orbital period
    have occurred since then.
    
    With a date of Oct 27, there was a notice for procurement for GFO-2:
    
    http://www.fbodaily.com/archive/2008/10-October/29-Oct-2008/FBO-01696519.htm
    
    Bob Christy posted:
    
    >Last time I checked its VHF transmission frequencies was Oct 27 - it
    >appeared to be operational.
    
    Please try again.  :-)
    
    Mike McCants
    
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