Re: CCSDS Orbit Ephemeris Messages (OEMs)

Thanks Jah, fantastic.

Obtener Outlook para iOS<https://aka.ms/o0ukef>
________________________________
De: Seesat-l <seesat-l-bounces+guzman.adrian=aem.gob.mx_at_satobs.org> en nombre de Jah, Moriba via Seesat-l <seesat-l_at_satobs.org>
Enviado: Thursday, November 5, 2020 4:53:46 PM
Para: Egemen İmre <egeimre_at_gmail.com>
Cc: seesat-l_at_satobs.org <seesat-l_at_satobs.org>
Asunto: Re: CCSDS Orbit Ephemeris Messages (OEMs)

Covariances are at the end of each file... merry Christmas

How they’re generated? Multiple sources but not TLEs ;)

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 | sites.utexas.edu/moriba
https://en.wikipedia.org/wiki/Moriba_Jah
Speaking Requests: lucas_at_gspeakers.com

Visiting Professor
Australian National University
College of Engineering and Computer Science
Research School of Aerospace, Mechanical, and Environmental Engineering
Mission Specialist, InSpace (ANU Institute for Space)
________________________________
From: Egemen İmre <egeimre_at_gmail.com>
Sent: Thursday, November 5, 2020 4:51:47 PM
To: Jah, Moriba <moriba_at_utexas.edu>
Cc: seesat-l_at_satobs.org <seesat-l_at_satobs.org>
Subject: 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<mailto: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><mailto:moriba_at_utexas.edu<mailto:moriba_at_utexas.edu>> | flow.page/moriba<http://secure-web.cisco.com/1dGXoBtYumn4ztbsC2g5YmP2Gvg_3EtevMPCeu2jmQbw2r35UFvyqy7stm1t2CUsSfAN5PW6mffphphrdsSUqTQll9GhluGt1v5klmgGZnLm4qwFaioTksvjIE5fOI1ot15R1paP05pfXf6FiHz_FkE0Q8HcQx6iVtsUAXkqIaltFY5xBRgCRmv9l741UVFG84PlI91tgn8kfjtdtvU1LOCTLNkYzz-J23UnXs3FOAJvQcaGXIQrEvSIqkI5OrWgvoKo_q6bwyk2na13EQ_ZSfmZE0cqJar0e3SyNd9sr-sQFq5fU6V3X4uTFbcC_Hro13f81XXgNdvDFN-vzV8Xhu8cuAvtCZ9i-Wj96m8rlWK0KDT9ZUbpl3yACTt3SLM5dEODh_lDRCsWlh2pCauqriRgip-bnHYJiJ6Jg_LKVBgOWtzHDFeFkQTnFKh5Vb3Di5lcJTzF4rR-V2nywSjYoHgREMiy6JujeRdb5PHeyVKWG0kxn_bivhaoRqrh75QQ5wWdNRxW8zB0kVw4dKi_PG4QWVzliSA4xfiquS6Ojerr40ua-UHj4wHVYQ8-ChQiR-imsmHZ5t0AtHJqZaYF3jA/http%3A%2F%2Fflow.page%2Fmoriba>


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