GRACE Satellites

From: Pinizzotto,Russell (ZZOTTO@mail.nwmissouri.edu)
Date: Thu Apr 25 2002 - 19:39:13 EDT

  • Next message: Tony Beresford: "Re: GRACE Satellites"

    Group:
    
    I observed both GRACE-1 and GRACE-2 again last night, this time from the
    front yard of my house, to see if they would be visible to the unaided eye.
    They were in Camelopardalis at 22:29 local, 3:29 UT.  They flared for about
    4 - 5 seconds to about the same mag as Polaris (+2.02) compared to the 5.9
    predicted by Heavens-Above.  They were 21.5 seconds apart, like the night
    before.
    
    The flat bottom nadir panel that was pointed out may be responsible.  It's
    certainly large enough when compared to an Iridium satellite.  Can the
    Iridium flare programs be modified to predict this behavior?
    
    Even though they make another pass tonight, the weather is uncooperative!
    
    Thanks Tony and Randy for the comments.
    
    Best Regards,
    Russ
    
    40.35 N; 94.97 W; 330 m ASL
    
    +-------------------------------------------------------+
    
    
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