RE: Question about TLE

From: Ted Molczan (seesat@rogers.com)
Date: Mon Aug 08 2005 - 20:10:46 EDT

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Javi wrote:

> Calsky published this TLE for a pass tomorrow morning in SW Europe:
> 
> STS-114         37.0 24.0 10.0  1.0 d
> 1 28775U 05026A   05221.55720825  .00016071  00000-0  12697-3 0  9067
> 2 28775  51.6452 347.6037 0013684  23.9079 336.2719 15.76308319  2215
> 
> And NASA published this TLE:
> 
> SHUTTLE
> 1 28775U 05026A   05220.54276396  .00016071  00000-0  12697-3 0  9019
> 2 28775  51.6442 352.8324 0027316  14.3845 345.8092 15.79756213  2058
> 
> For a similar epoch.
> 
> What must I use?

Both are from NASA, but the one you obtained from Calsky was issued a couple of
days ago, and now is out of date. So use the second one above. Note that Space
Track's latest elset from USSTRATCOM agrees with the newer NASA elset.

Ted Molczan

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