Re: IGS O2 ?

From: Björn Gimle via Seesat-l <seesat-l_at_satobs.org>
Date: Thu, 30 Jun 2016 08:39:53 +0200
This mail was originally rejected as containing a virus !
I have now edited it on my surfpad and sent from there, after removing the
Dropbox link, and attached.txt file.
Even if it is now accepted by Seesat-L , be careful !
Den 30 jun 2016 00:12 skrev "Björn Gimle" <bjorn.gimle_at_gmail.com>:
>
> A renewed look at José Luis Ruiz' images from June 7:
... 052908...Explain_cut
> convinced me that this was a real satellite - some flashes finally
> show a definitive partial track around them.
> The observations I reduced for three flashes/image were
80011 16 659A   3602 G 20160607032908000 18 25 0314562+835718 55 F
001900
80011 16 659A   3602 G 20160607032916000 88 25 0542723+833103 55 F
001900
80011 16 659A   3602 G 20160607032924000 88 25 0651970+820528 55 F
001900
80011 16 659A   3602 G 20160607032950000 88 25 0836270+741817 55 F
001900
80011 16 659A   3602 G 20160607032958000 88 25 0843598+725178 55 F
001900
80011 16 659A   3602 G 20160607033006000 88 25 0851035+710679 55 F
001900
>
> For fixing the mean motion, it was unfortunate that the three sets of
> obs 05-22, 05-30 and 06-07 are at 8 day intervals. However, it might
> be more than chance, maybe it was repeating pass times (closely) at 8,
> 4 or even two days intervals. The orbit propagated by VEC2TLE.EXE gave
> MeanMotion about 15.71 on May 22, so a 4-day repeat was likely.
> For June 07, a circular fit with ELFIND.EXE gave MM=15.76, like a
> previous fit (one was lower) - but since the exact time of flashes,
> and the start of each image, is not so accurate.
>
> Finally, I let ELOBSENT.EXE process all my reduced positions
> 05-22,05-30,06-07, changing all elements except e and AOP, but
> including B*, which gave this search elset :
IGS O2 20160607
1 80011U 06037A   16159.14590278  .00047597  00000-0  30173-3 0    07
2 80011  97.4630 312.9103 0012603 311.0602  93.6982 15.76381666    02
All observations and residuals are NOT attached (80011.txt available on
request). Note that the major part of the residuals are due to time
accuracy.
>
>
> observer.dat entry for pseudo-COSPAR 3602:
> [Ruiz Almeria] 36.838900 -2.449900 200 1
>
> José might have a low (32 deg W - too bright?) pass around 04:05 UTC
tonight,
> 25 deg E July  2 03:15, 58 deg E July 3 03:35
> --------------------------------------------------------
> 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 Thu Jun 30 2016 - 01:40:47 UTC

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