5919 Obs #28385

From: Björn Gimle via Seesat-l <seesat-l_at_satobs.org>
Date: Sun, 11 Sep 2016 18:58:50 +0200
Last night I found USA 179 r after a partial track scan. It was only 16 min
early on the classfd 163 days old, yet after adjusting B* to fix the time
offset, it still predicted it 4 degrees above the obs at 42 deg alt in the
SSE.
With inttles the figures were 13 min and 3 degrees.
Actually, the drag effect could make for several orbits in error-
increasing from 0.1 orbit to 1.1 orbit requires only a 7% drag increase.
I also changed AOP+MA to get the track closer to my obs, it might be more
helpful for a few days.
But this TLE shows a discrepancy in the track angle.

I'm at a loss as to which elements to adjust - more obs are needed.

USA 179 r +7 AOP
1 28385U 04034B   16091.25392007 0.00052500  00000-0  10019-2 0    00
2 28385  57.3390 119.7392 3808439 262.3433 232.2776  7.88880991    03
USA 179 Rk +MA
1 28385U 04034B   16254.46759977 0.00083586  00000-0  15065-2 0    00
2 28385  57.3489 276.6181 3697518 341.0707  33.7470  8.10254303  1633

IOD:
28385 04 034B   5919 G 20160910201034500 18 25 2210700+140900 55 R
28385 04 034B   5919 G 20160910201054500 18 25 2219900+160600 55 R

--------------------------------------------------------
Björn Gimle, COSPAR 5919
59.2617 N, 18.6169 E, 51 m
Satellite observation formats described:
http://www.satobs.org/position/IODformat.html
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Received on Sun Sep 11 2016 - 11:59:27 UTC

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