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Re: [Orekit Users] estimation of flow rate parameterDriver




"RHONE, Quentin" <quentin.rhone@airbus.com> a écrit :

Hello,

Hi Quentin,


I am trying to upgrade my estimation algorithm by adding parameterDrivers.
ConstantThrustManeuver.THRUST driver works well but when I try to estimate ConstantThrustManeuver.FLOW_RATE, the estimation process stops at the first iteration. I have seen in ConstantThrustManeuver that Orekit's flow rate is defined negatively whereas the flow rate parameter driver is declared as a positive number :

"parametersDrivers[1] = new ParameterDriver(FLOW_RATE, flowRate, FLOW_RATE_SCALE, 0.0, Double.POSITIVE_INFINITY);"

Can it be the source of my problem ?

Yes. You have just hit a bug that was reported about one month
ago but we did not fix yet, despite the bug report contains the fix :-(

The bug report is here: <https://www.orekit.org/forge/issues/327>.

best regards,
Luc

Cordially,

Quentin


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