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RE: [Orekit Users] Osculating


I am using:

Thales Alenia Space

-----Mensaje original-----
De: orekit-users-request@orekit.org [mailto:orekit-users-request@orekit.org] En nombre de Luc Maisonobe
Enviado el: lundi 11 juillet 2016 14:00
Para: orekit-users@orekit.org
Asunto: Re: [Orekit Users] Osculating

Le 11/07/2016 à 13:43, Elisabet a écrit :
> Hello,

Hi Elisabet,

> Using the DSSTPropagator, I am having problems to transform from 
> osculating parameters to mean parameters through the method 
> DSSTPropagator.computeMeanState. Do you have any idea of why it does 
> not work properly?
> It gives me the following thread:
> Exception in thread "main" java.lang.ArrayIndexOutOfBoundsException: 29
> 	at org.orekit.propagation.semianalytical.dsst.forces.DSSTZonal
> $FourierCjSjCoefficients.getCj(DSSTZonal.java:1896)
> 	at
> org.orekit.propagation.semianalytical.dsst.forces.DSSTZonal.computeCijSijCoefficients(DSSTZonal.java:762)
> 	at
> org.orekit.propagation.semianalytical.dsst.forces.DSSTZonal.updateShortPeriodTerms(DSSTZonal.java:662)
> 	at
> org.orekit.propagation.semianalytical.dsst.DSSTPropagator.computeMeanOrbit(DSSTPropagator.java:508)
> 	at
> org.orekit.propagation.semianalytical.dsst.DSSTPropagator.computeMeanS
> tate(DSSTPropagator.java:369)

It seems that there is a problem in the various max indices.

I think you have maxFrequencyShortPeriodics = 28 and maxDegreeShortPeriodics > 15 and it seems one loop using these parameters fails. I am not sure yet if the javadoc is wrong about the relationship between these two parameters, or the interval check is wrong.

Could you tell us what are the values you used for building DSSTZonal?

best regards,

> Best regards,
> Elisabet