Re: Superbird A issues

From: Ed Cannon (ecannon@mail.utexas.edu)
Date: Wed Dec 11 2002 - 22:20:38 EST

  • Next message: ccarrington.cs@clearstream.com: "Starshine 3"

    Rob wrote regarding searching for Superbird A solar panel 
    flash times:
    
    > Using my old axis and precession rate (probably good to 
    > within 10 minutes) here's what my software computes for 
    > December 12th UT:
    >
    > 89.95 deg (main glint):  03:50 UT
    > 89 deg:  03:57
    > 88 deg:  04:05
    > 85 deg:  04:29
    etc.
    
    Rob -- Thanks very much for the very interesting info and 
    analysis!  (One thing it leads me to conclude is why 
    Telstar 401 flashes can be so much brighter than Superbird 
    A -- presumably due to Telstar 401's flashes being from 
    its solar panels.)  Are the predicted times above like the 
    flash events we've been seeing, about a minute or so later 
    per night?  If we can get a clear night here, I'll try for 
    some of those times.  Would a good search window duration 
    be about ten minutes, or 20?
    
    Now, if only we could get some other flashing geosynchs 
    pinned down as well as Superbird A.  At least three or 
    four of them are pretty comparable, with fairly rapid 
    rotation and bright flashes (when visible) -- TDF 1, TDF 2, 
    Intelsat 512, for sure.  I have seen one-power flashes 
    from all three of them.  (Several flashing geosynchs have 
    been discovered via accidentally observed flashes that 
    were seen without magnification.)
    
    Ed Cannon - ecannon@mail.utexas.edu - Austin, Texas, USA
    
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