SV: Finally A Good Clear Evening
Björn Gimle (b_gimle@algonet.se)
Sat, 5 Jun 1999 11:47:57 +0200
>
> Using the 8", I observed Molniya 3-14 at 4:09:32.6 UT on 4 Jun 99
> at RA 14:21.8 and DEC +16:15.7 (J2000). I used the Satevo derived elset
> below. It was on track but two minutes later. It was faint and MAY have
> been tumbling.
>
> NORAD( 3)=12133
> 1 12133U 81002A 99155.22027212 .04410020 41513-3 28583-3 0 91503
> 2 12133 61.8643 48.3780 5132346 278.4798 28.8999 5.67429166 48530
>
> I was hoping to use IOD or another element set correction program to
> modify the elset in case it is "lost" soon but suspect that a single
> position may not be adequate. Comments from the experts are welcome.
>
Your elset is later than your observation, so it won't work to change the
most likely parameter - the drag term(s).
Is it a SatEvo evolution? In that case, which was the starting elset?
You can reduce Bstar (or ndot2 if you use SGP) by some percentage to
achieve two minutes at the obs.time (use SkyMap's 50% error effect)
Then change the SatEvo elset by the same percentage, and add 0.0014 to
the Epoch - or run Satevo with the adjusted drag and check the result.
Björn