Re: Calculating satellite movement in the arc.

From: John Locker (john@satcom.freeserve.co.uk)
Date: Thu Oct 23 2003 - 06:54:12 EDT

  • Next message: Tony Beresford: "Re: Calculating satellite movement in the arc." 

    Hi Tony,

Many thanks for that , in my ignorance I didnt realise that there could be
such a large discrepancy between sets.

I am in fact in discussion with Eutelsat as they have shown an interest in
using my images of the Hotbirds....so I guess I'll have a word with them to
see if there is a manouver in progress

Best wishes,

John.


----- Original Message ----- 
From: "Tony Beresford" <dberesford@adam.com.au>
To: "John Locker" <john@satcom.freeserve.co.uk>
Cc: <SeeSat-L@satobs.org>
Sent: Thursday, October 23, 2003 11:30 AM
Subject: Re: Calculating satellite movement in the arc.


> At 19:33 23/10/03, you wrote:
> >Hi Bjorn , thanks for the speedy reply....I'm going to have to go back
and
> >do some more homework .
> >
> >BTW my aldat file does show  24931 as 0.9045 inc and also at Calsky
>
>http://www.calsky.com/csrender.cgi?object=Satellite&number=3&obs=4397609264
86&tdt=2452935.91648768&sat=24931
> >
> >its listed as 0.9 ...... now I'm even more confused  :O)
> >
> >Off to get out the slide rule   .....
> John, Please allow for USSTRATCOM errors occasionally. Here are last 5 TLE
for 24931
> just harvested from OIG about 4 minutes ago
> HOT BIRD 3
> 1 24931U 97049A   03289.80272626  .00000000  00000-0  10000-3 0  4431
> 2 24931   0.9045 327.6974 0773354  90.9784 276.7207  1.00245269 22478
> HOT BIRD 3
> 1 24931U 97049A   03288.88092003  .00000094  00000-0  10000-3 0  4429
> 2 24931   0.0253 182.3956 0006790  34.2979 137.4369  1.00273807 22477
> HOT BIRD 3
> 1 24931U 97049A   03272.85543384  .00000081  00000-0  10000-3 0  4417
> 2 24931   0.0390 271.8908 0004653 254.5806 162.7319  1.00274542 22318
> HOT BIRD 3
> 1 24931U 97049A   03267.90578126  .00000083  00000-0  10000-3 0  4400
> 2 24931   0.0512 271.9572 0004653 254.4143 176.0634  1.00272696 22265
> HOT BIRD 3
> 1 24931U 97049A   03261.88748196  .00000088  00000-0  10000-3 0  4390
> 2 24931   0.0461 249.6269 0004654 276.6232 163.6635  1.00271064 22204
>
> The sources you quote are just quoting the most recent. This could of
course
> be an error in identification of which satellite is which, or there was
> some minor manouvering at time of observation which the orbit model
> has amplified because it cant know that a correcting manouver was applied
> after the observation. We just have to wait till another elset is
released,
> or eutelsat communicates its own observations.
>
> Tony Beresford
>
>
>
>
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