Re: Ekran at last

From: Igor Lissov (i-cosmos@mtu-net.ru)
Date: Thu Apr 12 2001 - 01:42:52 PDT

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    Leo and Jay,
    
    > Jay Respler is right and I got it wrong.
    > But it remains strange that the earlier epoch has a higher TLE#.
    
    It is not so much strange. U.S. SpaceCom sees one object in GTO (while it
    issued elements for it with two different catalog numbers) -- in fact it is
    the Briz-M detachable tank.
    
    EKRAN 21
    1 26736U 01014A   01099.43967926 -.00000099  00000-0  00000+0 0    17
    2 26736  47.9572 260.5505 7039165   0.5049 359.7483  2.24416905   127
    SL-12 R/B
    1 26737U 01014B   01099.44002941 -.00000099  00000-0  00000+0 0    16
    2 26737  47.9548 260.5488 7039081   0.5066   0.0317  2.24417130   119
    SL-12 R/B
    1 26737U 01014B   01099.88526272 -.00000093 +00000-0 +00000-0 0 00028
    2 26737 047.9536 260.4452 7039241 000.6036 359.7346 02.24417139000139
    SL-12 R/B
    1 26737U 01014B   01100.77643975 -.00000076 +00000-0 +00000-0 0 00042
    2 26737 047.9512 260.2389 7039621 000.7947 359.7149 02.24417164000155
    
    And, probably, two objects in GEO but under the same catalog numbers. I
    guess
    first elset below is for the satellite (after initial drift stopped) and the
    rest are for Briz-M
    upper stage (drift continued).
    
    EKRAN 21
    1 26736U 01014A   01097.93867714 -.00000266 +00000-0 +00000-0 0 00033
    2 26736 000.4013 073.9714 0162224 018.6200 168.7042 01.00137055000087
    EKRAN 21
    1 26736U 01014A   01098.89835065 -.00000045  00000-0  00000+0 0    48
    2 26736   1.8174 260.4420 0162225 192.1647 145.3614  0.98034764    97
    EKRAN 21
    1 26736U 01014A   01099.97918077 -.00000031  00000-0  00000+0 0    59
    2 26736   2.1259 258.4755 0338111 213.1961 145.5154  0.98004585   106
    EKRAN 21
    1 26736U 01014A   01100.98496323 -.00000037  00000-0  00000+0 0    65
    2 26736   2.0345 259.0879 0240143 199.8447 154.1653  0.97965450   118
    
    In each set, at least one elset is omitted: #3 for GTO and #2 for GEO.
    
    The U.S. SpaceCom wasn't lucky with the launch because (1) no objects in LEO
    existed, and (2) Briz-M overperformed and apogee of the resulting GEO was
    some 37100 kilometers, not 35800 as expected, and (3) it occured late Friday
    evening, U.S. time.
    
    Naturally, U.S. SpaceCom still should renumber Mars Odyssey as 2001-014 and
    Ekran M #18 (aka Ekran 21 and Ekran M6) as 2001-013.
    
    Igor Lissov
    
    
    
    
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