RE: TiPS and Vanguard 3

From: Ted Molczan (molczan@rogers.com)
Date: Sun Aug 15 2004 - 23:33:23 EDT

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    Steve Newcomb wrote:
    
    > TiPS is my favorite telescopic sat, you get 2 for 1 plus the 
    > flicker of light from the tether which can be long or short 
    > depending on the its elevation. Would someone calculate for 
    > my location what is the separation of the 2 sats, or the 
    > lenght of the tether, for TiPS at the various elevations 
    > above the horizon? How much will it vary because of eccentricity?
    
    The following table states the apparent length of TiPS, in arc min, for
    elevations between 0 and 90 deg, for three different altitudes: perigee=796 km;
    mean=998 km; apogee=1199 km:
    
             Alt - km
         ----------------
    El    796   998  1199
    --   ----------------
     0   3.73  3.21  2.83
    10   5.11  4.25  3.64
    20   6.53  5.28  4.44
    30   7.64  6.07  5.02
    40   8.14  6.40  5.25
    50   7.87  6.15  5.02
    60   6.80  5.29  4.30
    70   4.99  3.88  3.14
    80   2.64  2.05  1.66
    90   0.00  0.00  0.00
    
    Ted Molczan
    
    
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