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RE: [Orekit Users] Osculating
Hello,
I am trying to compute mean elements via the computeMeanState method from DSSTPropagator class.
I have faced the same error as Elisabet so I switched Orekit to 9.0-SNAPSHOT version and Hipparchus to the matching 1.1-SNAPSHOT version.
This in-dev version does include the patch that was provided by Luc in September but but latest 9.0-SNAPSHOT throws a similar error when I run my code :
Caused by: java.lang.ArrayIndexOutOfBoundsException: 29
at org.orekit.propagation.semianalytical.dsst.forces.DSSTZonal$ZonalShortPeriodicCoefficients.value(DSSTZonal.java:1057)
at org.orekit.propagation.semianalytical.dsst.DSSTPropagator.computeOsculatingOrbit(DSSTPropagator.java:562)
at org.orekit.propagation.semianalytical.dsst.DSSTPropagator.computeMeanOrbit(DSSTPropagator.java:511)
at org.orekit.propagation.semianalytical.dsst.DSSTPropagator.computeMeanState(DSSTPropagator.java:368)
Is the bug now resolved in Orekit/Hipparchus and my configuration is not ok or do you have the same problem ?
Best regards,
Quentin
-----Original Message-----
From: orekit-users-request@orekit.org [mailto:orekit-users-request@orekit.org] On Behalf Of Luc Maisonobe
Sent: Monday, July 11, 2016 3:50 PM
To: orekit-users@orekit.org
Subject: Re: [Orekit Users] Osculating
Le 11/07/2016 à 14:10, CID BOROBIA Elisabet a écrit :
> Hello,
Hi Elisabet,
>
> I am using:
> maxDegreeShortPeriodics=15
> maxEccPowShortPeridocs=13
> maxFrequencySortPeridics=28
Thanks. There really seem to be a problem in the boundary checks.
Could you try to apply the attached patch and see if things improve?
There may be some line shifts in the patch because I have created it
from the current development version based on Hipparchus, which is
different from the 7.x series.
best regards,
Luc
>
> Elisabet CID BOROBIA
> 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,
> Luc
>
>>
>> Best regards,
>>
>> Elisabet
>>
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