Re: [Orekit Developers] Earth Centered ICRF

[paulcefo <paulcefo@buffalo.edu>]

Luc and Hank,

We have a B1950.0 option in Linux GTDS.  If you want, I will talk to 
Zach Folcik about this question.

We have been thinking about coordinate systems lately because we are 
starting to port the TRAMP program for the maintenance of the GTDS 
binary files to Linux.  Having Linux TRAMP will enable us to generate 
Timing Coefficient and SLP files for time intervals for which they are 
not currently available.

We have two targets in mind: (1) historical intervals and (2) very long 
intervals (100 or 200 years).  Item (2) relates to demonstrating the 
ability of the DSST to propagate usefully over very long time intervals.

Paul

--
Dr. Paul J. Cefola
Consultant in Aerospace Systems, Spaceflight Mechanics, & Astrodynamics
Adjunct Faculty, Dept. of Mechanical and Aerospace Engineering, 
University at Buffalo (SUNY)

4 Moonstone Way
Vineyard Haven, MA 02568
USA

508-696-1884 (phone on Martha's Vineyard)
978-201-1393 (cell)

paulcefo@buffalo.edu
paul.cefola@gmail.com

On 10/18/2014 3:54 am, MAISONOBE Luc wrote:
> Hi Hank,
>
> Hank Grabowski <hank@applieddefense.com> a écrit :
>
> > Hello all,
> >
> > Looking over the coordinate systems that are available, I can't figure 
> > out
> > a way to get an earth-centered (or for that matter central body 
> > centered)
> > ICRF coordinate system directly. I know I may just be overlooking
> > something.  If it isn't possible, would this be something that others 
> > would
> > be interested in having in the Orekit FramesFactory object?
>
> If you have a use case for this, why not?
> Adding predefined frames in FramesFactory is not costly as they are
> built only as needed, so we can add as much as we want.
>
> By the way, if you have an accurate definition of what the old B1950
> frame really is, this is also one frame that could be worth adding.
> There is a B1950-frame branch in the Git repository, but it was never
> sufficiently validated. It is also not in sync with master. If anybody
>  want to give a look at it, they are welcome.
>
> best regards,
> Luc
>
> > Hank
>
>
>
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