Ok. I already had a rough implementation and test that you are welcome to build off of, if you like. [1] It doesn't take into account the secular rate in the obliquity of the ecliptic. Cheers, Evan [1] https://www.orekit.org/forge/issues/166 On Thu 06 Mar 2014 09:10:35 PM EST, Hank Grabowski wrote: > I can take this one. > > > On Thu, Mar 6, 2014 at 11:33 AM, paulcefo <paulcefo@buffalo.edu > <mailto:paulcefo@buffalo.edu>> wrote: > > Luc, > > The attached abstract has been sitting in my "to do" box for > several years. > > The overall project has implications with respect to coordinate > systems. > > best regards, > > 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 <tel:508-696-1884> (phone on Martha's Vineyard) > 978-201-1393 <tel:978-201-1393> (cell) > > paulcefo@buffalo.edu <mailto:paulcefo@buffalo.edu> > paul.cefola@gmail.com <mailto:paul.cefola@gmail.com> > > > On 03/06/2014 9:24 am, Luc Maisonobe wrote: > > Le 06/03/2014 15:03, Hank Grabowski a écrit : > > While we are at it we could add some additional central > body inertial > frames as well, at least for now Mars and Moon would be > some good > additions... > > > They are already available, see > CelestialBody.__getInertiallyOrientedFrame > and CelestialBody.__getBodyOrientedFrame. The only > implementation we have > for CelestialBody is to load either JPL or Inpop ephemerides, > and on top > of this we add the IAU poles and prime meridian models. > > Luc > > > > On Thu, Mar 6, 2014 at 8:59 AM, Luc Maisonobe > <Luc.Maisonobe@c-s.fr <mailto:Luc.Maisonobe@c-s.fr> > <mailto:Luc.Maisonobe@c-s.fr > <mailto:Luc.Maisonobe@c-s.fr>>> wrote: > > Le 06/03/2014 14:55, Hank Grabowski a écrit : > > That would be a great feature! > > Sure, and quite easy to do. > > If anybody want to give it try, just open an issue > and attach a patch > with the contribution. > > best regards, > Luc > > > > > > > On Thu, Mar 6, 2014 at 8:50 AM, Evan Ward > <evan.ward@nrl.navy.mil <mailto:evan.ward@nrl.navy.mil> > <mailto:evan.ward@nrl.navy.mil > <mailto:evan.ward@nrl.navy.mil>__> > > <mailto:evan.ward@nrl.navy.mil > <mailto:evan.ward@nrl.navy.mil> > <mailto:evan.ward@nrl.navy.mil > <mailto:evan.ward@nrl.navy.mil>__>>> > wrote: > > > > Hi, > > > > Does Orekit provide a reference frame aligned > with the > ecliptic? Maybe I > > just missed it, but I couldn't find one in the > FramesFactory > or the > > CelestialBodyFactory. > > > > Best Regards, > > Evan > > > > > >
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