Comment on Bug 93 report
I have explored the issue raised in Bug 93. I have recreated the test case using the Linux R&D GTDS numerical propagator and the GTDS implementation of DSST. I created precise mean element initial conditions for the DSST using a PCE process. I then integrated the numerical propagator and the DSST ahead over a twenty (20) year interval. The key result is the plot of the eccentricity histories (Figure 2 in the attached file).
The numerical and DSST eccentricity agree well over the 20 yrs. The differences are much smaller than the differences reported by Billemont.
Therefore, I think we can suspect that there is a difference between Orekit DSST and GTDS DSST.
In the attached file I have provided both the initial conditions for the numerical propagation (Table 1) and the DSST propagation (Table 3).
(from redmine: issue id 95, created on 2012-05-14, closed on 2012-05-14)
- Relations:
- relates #93 (closed)
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- CefolaCommentOn_OrekitBug93_rev3.pdf Comments on Orekit Bug 93