Decay watch: 2002 March 27

From: Alan Pickup (alan@wingar.demon.co.uk)
Date: Wed Mar 27 2002 - 18:42:51 EST

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    A summary of the final notices for the two latest decayers:
    ____________________________________________________________________
    Object: #15679 = 85- 35 C = GStar 1 Ariane 3 rocket
    
    Final decay analyses:
    Source   Prediction made    Predicted decay at      Latitude Longitude
                    UTC                UTC                  deg      deg
    SpaceCom   Mar 27 19:07     Mar 27 17:43 +-2h         0.0 N    25.0 E
    SatEvo     Mar 27 23:15     Mar 27 17:37 +-10m        3.0 S     1.4 E
    
    Final elset:
    GStar 1 Ariane 3 r                               261 x 113 km
    1 15679U 85035C   02086.67815157  .86040068 -35625-4  91360-3 0  1504
    2 15679   6.4985 118.5911 0112803 299.1047  61.4789 16.32169231222178
    
    Note: I show this decaying to the s of the Gulf of Guinea just prior
    to a pass across central Africa. SpaceCom's decay point is a little
    further on, over the Dem. Rep of Congo.
    _____________________________________________________________________
    Object: #27393 = 02- 12 C = GRACE 1 Briz-KM rocket
    
    Final decay analyses:
    Source   Prediction made    Predicted decay at      Latitude Longitude
                    UTC                UTC                  deg      deg
    SpaceCom   Mar 27 07:41     Mar 27 07:18 +-7m        57.0 S    58.0 E
    SatEvo     Mar 27 23:30     Mar 27 07:10 +-20m       87.1 S    98.5 W
    
    Final elset:
    GRACE 1 Briz-KM r                                170 x 102 km
    1 27393U 02012C   02086.21805582  .26738923 -16047-5  13186-3 0   487
    2 27393  88.9910 353.0353 0052206 240.4976 267.0541 16.51252679  1572
    
    Note: Although there is a decent arc of uncertainty, I have this
    decaying near southern apex over Antarctica on the orbit given by
    this SatEvo-predicted elset:
    GRACE 1 Briz-KM r                                154 x 100 km
    1 27393U 02012C   02086.25371329  .48745162  17027+1  19809-3 0 90485
    2 27393  88.9889 353.0295 0041364 240.3327 119.2547 16.54607204  1580
    _____________________________________________________________________
    
    
    Alan
    -- 
    Alan Pickup / COSPAR 2707:  55.8968N   3.1989W   +208m   (WGS84 datum)
    Edinburgh  / SatEvo & elsets:    http://www.wingar.demon.co.uk/satevo/
    Scotland  / Decay Watch: http://www.wingar.demon.co.uk/satevo/dkwatch/
              *
    
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