Re: Question about the age of available TLEs

From: Gavin Eadie via Seesat-l <>
Date: Tue, 13 Feb 2018 11:10:27 -0500
Much is clarified, thanks Chris.  A question remains related to the TLE epochs though.

As I write this on Feb 13 at ~11:10 AM EST, the epoch on the ISS TLE in the AmSat list is not only ahead of Space-Track, it’s also 14 hours in the future [Feb 14, 2018 at 4:14:34 AM EST].  Whoever is creating "nasabare.txt" is choosing to do that .. (a) is that intentional and, (b) is that an acceptable practice?

> On Feb 13, 2018, at 2:51 AM, Chris Peat via Seesat-l <> wrote:
> As you can see from the file name, this appears to come from NASA originally. What I did not realise, is that the ISS is included in this list because it is of great interest to amateur radio enthusiasts. The epoch of the ISS elements is often ahead of those on Space-Track. Our import script always favours elements with the latest epoch, so these elements overwrite the Space-Track ones.
> I hope this clarifies things for you.

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