Re: CCSDS Orbit Ephemeris Messages (OEMs)

Hey Moriba,

Thanks for the ever growing service from Astriagraph. I wonder a couple of
things though (which you might want to add as a comment to the OEM):
1.  How are they generated? Are they based on SGP4 propagated TLEs?
2. If so, which TLE? supplied by the operator or NORAD? What is the epoch?
3. If propagated numerically, then what is the physical and numerical
model? (Geopotentials, drag etc. and DOP853, RK78 etc)

I am a fan of using the trajectory information rather than the initial
orbit when possible (matching two propagations is always a mess), so this
might be helpful for analyses for those who don't want the hassle of
actually propagating the orbit.

Obviously, Christmas is coming and I want covariance data from Santa Claus.
:)

Here goes my 2 Turkish liras (equal to about 21 Euro cents these days).

Cheers,
egemen

On Wed, 4 Nov 2020 at 19:55, Jah, Moriba via Seesat-l <seesat-l_at_satobs.org>
wrote:

> Greetings:
>
> You can now get CCSDS-formatted Orbit Ephemeris Messages (OEMs) from
> http://bit.ly/astriagraph for any anthropogenic space objects under the
> following designations:
>
>
> STARLINK
>
> IRIDIUM
>
> FLOCK
>
> INTELSAT
>
> GALAXY
>
> TDRS
>
> GALILEO
>
> Search under any of these and for any given ASO you should see something
> like: Click here<
> http://astria.tacc.utexas.edu/AstriaGraph/SP_ephemeris/24957.oem> to
> download ephemeris (try the link here for yourself).
>
> Let me know your thoughts…
>
> Moriba Jah, Associate Professor
> The University of Texas at Austin |
> Aerospace Engineering and Engineering Mechanics Department |
> Mrs. Pearlie Dashiell Henderson Centennial Fellowship in Engineering |
> Oden Institute for Computational Engineering and Sciences |
> 512-471-0717 | moriba_at_utexas.edu<mailto:moriba_at_utexas.edu> |
> flow.page/moriba
>
>
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>
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