Re: [Orekit Users] DSSTPropagator isOsculating

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

Elisabet <elisabet.cid-borobia@thalesaleniaspace.com> a écrit :

> Hello,
>
> Luc, your code also works for me. The error occurs when the earthOrder is
> different from 0 in the UnnormalizedSphericalHarmonicsProvider. There is not
> any problem if : GravityFieldFactory.getUnnormalizedProvider(earthDegree,0);
> However, it throws an arithmetic error when:
> GravityFieldFactory.getUnnormalizedProvider(earthDegree,EarthOrder);
>
> Could you verify this?

Still no problems.

When I call GravityFieldFactory.getUnnormalizedProvider(earthDegree,  
earthOrder) with
earthOrder set to 4 (instead of forced to 0 as in my previous mail), I  
get this:

mean:       equinoctial parameters: {a: 7120000.0; ex:  
-9.743700647852352E-4; ey: 2.2495105434386478E-4; hx:  
0.39375193676896686; hy: 0.4222472565026574; lv: 179.0;}
osculating: equinoctial parameters: {a: 7119197.746018779; ex:  
-7.268671251360758E-4; ey: 5.352135157065923E-4; hx:  
0.3938711876441645; hy: 0.4221175844115694; lv: 178.98823442719726;}

So the osculating parameters are different from the previous ones,  
which is expected.

I don't get any exceptions.

Could you send the full stack trace of the exception you get? What are  
the non-zero degree order you use?

With the current development code, I do get an exception when degree  
and order are set to 2,
but it is an ArrayIndexOutOfBoundException, not an  
ArithmeticException. I'll investigate
that one.

best regards,
Luc

> Best regards,
>
> Elisabet