Hi,I'm using NodeDetector and ElevationDetector, both wrapped in a logger.monitorDetectorRegards/Petrus--On Fri, May 15, 2015 at 8:40 PM, Evan Ward <evan.ward@nrl.navy.mil> wrote:Hi Petrus,
Which event detector(s) are you using?
Regards,
Evan
On 05/15/2015 02:25 PM, Petrus Hyvönen wrote:
Hi,
I'm experiencing some strange errors in my propagation with some eventdetectors, and thought I'd ask you for comments. I'm using orekit via the pythonwrapper so debugging is a bit complex..
It seems to occur only on certain orbits, but I'm just changing altitude and inclination (SSO) so seems more like some math issue. For some orbits it works.
The error stack is:JavaError: org.apache.commons.math3.exception.NumberIsTooLargeException: endpoints do not specify an interval: [60, 59.951]Java stacktrace:org.apache.commons.math3.exception.NumberIsTooLargeException: endpoints do not specify an interval: [60, 59.951]at org.apache.commons.math3.analysis.solvers.UnivariateSolverUtils.verifyInterval(UnivariateSolverUtils.java:417)at org.apache.commons.math3.analysis.solvers.UnivariateSolverUtils.verifySequence(UnivariateSolverUtils.java:435)at org.apache.commons.math3.analysis.solvers.BaseAbstractUnivariateSolver.verifySequence(BaseAbstractUnivariateSolver.java:280)at org.apache.commons.math3.analysis.solvers.BracketingNthOrderBrentSolver.doSolve(BracketingNthOrderBrentSolver.java:154)at org.apache.commons.math3.analysis.solvers.BaseAbstractUnivariateSolver.solve(BaseAbstractUnivariateSolver.java:199)at org.apache.commons.math3.analysis.solvers.BaseAbstractUnivariateSolver.solve(BaseAbstractUnivariateSolver.java:204)at org.apache.commons.math3.analysis.solvers.BracketingNthOrderBrentSolver.solve(BracketingNthOrderBrentSolver.java:398)at org.orekit.propagation.events.EventState.evaluateStep(EventState.java:231)at org.orekit.propagation.analytical.AbstractAnalyticalPropagator.acceptStep(AbstractAnalyticalPropagator.java:279)at org.orekit.propagation.analytical.AbstractAnalyticalPropagator.propagate(AbstractAnalyticalPropagator.java:167)at org.orekit.propagation.AbstractPropagator.propagate(AbstractPropagator.java:257)
The call (from python) is:finalState = prop.propagate(self.ore_t[0].shiftedBy(60 * 60 * 24.0 * self.duration))
prop.getInitialState().getOrbit()<Orbit: keplerian parameters: {a: 7138142.0; e: 7.004623892026274E-7; i: 98.51876854105349; pa: 0.0; raan: 94.9995; v: 0.00700813981787154;}>
the propagator is a:org.orekit.propagation.analytical.EcksteinHechlerPropagator
I'm running orekit 7.0 with apache math 3.4.2.
Do you have any feeling what could be the issue? I have the impression that this part of orekit would be very well used, so maybe it's something I'm doing but hard to see what.
Any inputs appriciated
Best Regards/Petrus
_____________________________________________
Petrus Hyvönen, Uppsala, Sweden
Mobile Phone/SMS:+46 73 803 19 00