Covariance Matrix - Reduced Dynamic Orbit Parametrization in GNSS Processing

[Bemtgenj]

Hello,

I am currently running a reduced dynamic orbit GNSS processing script and was wondering how i could print out the covariance matrix. In the GNSS processing for kinematic orbits the parameterization ""kinematicPositions" already had a line included for "outputCovarianceEpoch" - this is not included on the reduced dynamic orbit parametrization. I have looked through the documentation and found several reference to covariance matrix (.i.e AutoregressiveModel2CovarianceMatrix) but i am not clear which one to use or how to do this.

TXS for the feedback and help - very much appreciated

Cheers
Jean

[tmayerguerr]

Hi Jean,

Epoch-wise covariances for reduced dynamic orbits are not yet implemented. Since the positions are not estimated directly, but the orbits is parameterized by a few dynamic parameters, a full variance/covariance propagation would be required. To obtain the covariance matrix of the dynamic parameters, you can write out the matrix of the normal equation (writeNormalEquations). The inverse of this matrix is the covariance matrix of the dynamic parameters.

regards
Torsten

[Bemtgenj]

Hi Torsten

Txs for the feedback and the explanation on how to get the covariances for those orbits

Cheers
Jean