Updated NROL-24 elements

From: Ted Molczan (ssl2molcz@rogers.com)
Date: Fri Dec 14 2007 - 00:58:59 UTC

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    Peter Wakelin has reported observations made on Dec 13, which I have used in
    these updates:
    
    USA 198                                                259 X 16774 km
    1 32378U 07060A   07347.70298699  .00000273  00000-0  27163-4 0    05
    2 32378  60.0102 316.7088 5544157 287.2561  21.4044  4.77576618    05
    Arc 2007 Dec 11.01 - 13.81, WRMS residuals = 0.012 deg
    
    Centaur                                                224 X 16299 km
    1 32379U 07060B   07347.83811522  .00041920  00000-0  19103-2 0    03
    2 32379  60.7629 317.4582 5490058 285.5459  22.5500  4.90095032    01
    Arc 2007 Dec 11.01 - 13.87, WRMS residuals = 0.022 deg
    
    Bob Christy (of the U.K.) and Sven Grahn (of Sweden) made accurate radio
    observations of the spacecraft soon after it reached orbit. Combining their data
    with information about the intermediate orbit determined from visual
    observations, enables reasonably accurate determination of the LEO parking
    orbit:
    
                                                             209 X 262 km
    1 32378U 07060A   07344.96844907  .00000000  00000-0  00000-0 0    04
    2 32378  60.0091 318.1716 0040000 106.8858 180.0000 16.14000000    09
    
    The orbit agrees to within several seconds of the time of closest approach,
    which Bob and Sven determined by observing the effects of Doppler shift on the
    radio signal. The apogee of the parking orbit intersects with the perigee of the
    intermediate orbit, on 2007 Dec 10 at 23:14:34 UTC, 282 km above 56.145 S,
    168.537 W.
    
    Ted Molczan
    
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