DMSP F16 elements

From: Ted Molczan (
Date: Fri Nov 07 2003 - 12:13:03 EST

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    Elements derived from observation arc 2003 Nov 04 - 06 UTC:
    DMSP F16         0.0  0.0  0.0  6.2 v
    1 28054U 03048A   03310.83790588  .00000100  00000-0  53297-4 0    03
    2 28054  98.9237 344.4062 0007025 246.2110 113.8326 14.13384099    08
    WRMS residuals = 0.018 deg
    Over the past couple of days, the solar flux has fallen back to its pre-solar
    flare levels, so I have shortened the arc and fixed the rate of decay at a lower
    value. In view of the short arc, I also fixed inclination and eccentricity to
    ensure a reasonable result.
    The slight decrease in mean motion since my previous elset is not indicative of
    orbital manoeuvring (DMSPs do not manoeuvre orbits after their apogee-kick
    burn). A constant-drag model like SGP4 does not handle arcs containing large
    variations in drag very well. Also, over short arcs, observational errors reduce
    the number of significant digits.
    Ted Molczan
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