Re: [Orekit Developers] TLE.getLine1 problem

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

Petrus Hyvönen <petrus.hyvonen@gmail.com> a écrit :

> Hi,

Hi Petrus,

> I'm using orekit 5.0.3 through Python-JCC so I have unfortionately
> very little debug info.
> I have a TLE object that I created and it propagates fine, but fails
> at generating Line1 through TLE.getLine1. Line 2 works fine.
>
> JavaError: java.lang.StringIndexOutOfBoundsException: String index out
> of range: 67
>     Java stacktrace:
> java.lang.StringIndexOutOfBoundsException: String index out of range: 67
>
> 	at java.lang.StringBuffer.charAt(Unknown Source)
>
> 	at org.orekit.tle.TLE.checksum(TLE.java:630)
>
> 	at org.orekit.tle.TLE.buildLine1(TLE.java:335)
>
> 	at org.orekit.tle.TLE.getLine1(TLE.java:271)

It seems the generated line is one character too short (it should have  
68 characters, from 0 to 67, and here it cannot access the last  
character at index 67). Could you add a print statement between lines  
334 and 336 in TLE.java and send the printed line ? There is probably  
one field that is too short, perhaps due to the formatting that occurs  
in the buildLine1 method up to line 334.

best regards,
Luc

> My related values are (from TLE.getXXX):
> Bstar = 1.61652325142e-08
> Epoch = 2012-01-26T11:00:00.000
> Ecc = 1.09462694314e-17
> Inclincation [deg] = 98.2110658471
> Mean Anomaly [deg] = 0.00840773904342
> Launch Year = 2000
> Perigee Argument = 359.973568353
> Raan =  95.1981492898
> Rev at epoch =  1
> MM first der = 0.000277257783139
> MM second der =  -0.000231259154379
>
> Regards
> /Petrus



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