Re: [Orekit Developers] Gravity field file without degree 0 or 1

[MAISONOBE Luc <luc.maisonobe@c-s.fr>]

Evan Ward <evan.ward@nrl.navy.mil> a écrit :

> My thought is that if C_2,0 is missing, that is a big problem and
> should result in an error, (as it does now) but if C_1,0 is missing,
> that is not a problem because we know C_1,0 is identically 0. Basically
> I think it should throw and exception when it is missing "real" data,
> but not when it is missing data that we know at compile time. Does this
> make sense?

Ah, yes, you are right, sorry for the misunderstanding.
I think it is worth registering it as a bug in the forge and fix it.
Could you take care of that?

best regards,
Luc

> Regards,
> Evan
>
> On Fri 17 Jan 2014 02:17:04 PM EST, MAISONOBE Luc wrote:
> > Evan Ward <evan.ward@nrl.navy.mil> a écrit :
> >
> > > Hi,
> >
> > Hi Evan,
> >
> > > I was trying to parse the gravity field file for EGM2008 from [1], which
> > > does not specify the coefficients for degree 0 and 1. Current behavior
> > > is to initialize to NaN and then throw an exception if they are not
> > > specified. Since these coefficients are always zero I propose we
> > > initialize them to 0 instead of NaN in the GravityFieldReaders. What are
> > > your thoughts? This will be a small change in behavior without a change
> > > in the API.
> >
> > Doesn't the "missingCoefficientsAllowed" boolean parameter to the
> > EGMFormatReader precisely do that?
> >
> > Luc
> >
> > > Best Regards,
> > > Evan Ward
> > >
> > > [1] http://icgem.gfz-potsdam.de/ICGEM/modelstab.html
> >
> >
> >
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