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