Re: 4541 SATOBS 30 DEC 2015 OTV4

From: Björn Gimle via Seesat-l <seesat-l_at_satobs.org>
Date: Sun, 3 Jan 2016 15:29:16 +0100
There are programs and TLE descriptions on
https://www.prismnet.com/~mmccants/  (also elsets for classified sats)
http://satobs.org/orbsoft.html
that can assist you to do this accurately.

But for sufficient accuracy you can usually run a prediction (even
Heavens-Above) and locate the observation point (RA 22h 08m Decl. -18d 34m)
and check the time offset.
In HeavenSat.exe you can even load the obs file and have the points
displayed (see att.)
40651 15 025A   4541 F 20151230174003600 17 25 2208870-183483 18
40651 15 025A   4541 F 20151230174026220 17 25 2245430-191167 38
Alberto Rango, Roma,  4541  41°.9668N  012°.4545E  80 mt.

The largest error is usually in the time of pass, which also effects the
location of the orbit. In this case it is accurate to the second, but if
not you can just estimate the current error.
Or you can experiment changing the elset B* or MeanMotion (or even
MeanAnomaly and other elements) to fit the observation(s) better depending
on the suspected cause (drag, maneuvre or "unknown")


--------------------------------------------------------
Björn Gimle, COSPAR 5919
59.2617 N, 18.6169 E, 51 m
Satellite observation formats described:
http://www.satobs.org/position/IODformat.html
---------------------------------------------------------

Do you have that as a TLE?

>
> I do not know how to convert it.
>
> Thanks
> Don
>
> <http://mailman.satobs.org/mailman/listinfo/seesat-l>
>
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Received on Sun Jan 03 2016 - 08:30:07 UTC

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