Empirical Parameter print out

[Bemtgenj]

Good Morning,

I have completed the GNSS processing to get different sets of reduced dynamic orbit solutions and now i want to print out the empirical parameters from the reduced dynamic orbit solutions.

Do i do this like this?

1. in the GNSS processing use the processing step writeAprioriSolution, (x0 and parameterfile)
2. Paramterselection2Indexvector
3. MatrixCalculate
4. Reorder

or is there another way?

Thank you very much for your help

BR
Jean

[Bemtgenj]

Print screen of setup so far

[ajs8041]

Dear Jean,

this looks already very reasonable, in principle I do it identically and I am not aware of any shortcut to achieve this. Does this already provide the output you need?

Best regards,
Andreas

[Bemtgenj]

Daer Andreas ,

thanks for the reply. i get this

i did change the wild card to e.g. ::accBias.x:: in my latest trial.

i was expecting values around xx *10-8 and smaller but definitely not zeros. In the x0 file is see numbers around that range which i was thinking then that i would se those numbers in the x0reord.

BR
Jean

[ajs8041]

Maybe just go for the wildcard option, I am a bit confused about the "names" one:

Also, I guess it is not a bad idea to manually check one corresponding accBias.x entry in your parameter file, just to be sure it is indeed non zero.

Best regards,
Andreas

[Bemtgenj]

Hi Andreas

Txs for the feedback

i solved the problem now

1. i did the manual check as you suggested and the values are not zero -> so i had a problem in the script somewhere
2. i did VTEC as those were the first lines in the parameters / data files to see if the script works (this was easier to check as that parameter is on top of the files - don't have to scroll down to check) - that worked with the correct naming of the variable -> script is fine
3. I use the wildcard setting to get the accBias and then that worked as well

I want to very much thank you again for your help - very much appreciated

BR
Jean

[Bemtgenj]

One additional question with regards to the output and the reference frame based on the documentation

documentation

i did not see an option for including attitude - so CRF is used? or meaning that the accBias results are in CRF?

Txs very much again for the help

BR
Jean

[Hanbing59]

Hi Jean,

I thinks the satellite attitude here means the inputfileStarCamera field within option receiver (lowEarthOrbiter type of course) of the program GnssProcessing. However, as it seems that this field is mandatory for LEOs. The AccBias should be always in SRF.

Therefore, I am also confused about by the documentation:

If the attitude of the satellite is not provided the Celestial Reference Frame (CRF) is used instead

Hope others could give a hint on this.

Best regards,
Hanbing

[Bemtgenj]

Hi Hanbing

That is what i was thinking too, but then the orbit files and other results for the GNSS processing are not in SRF but in CRF so why is the accBias then in SRF?

BR
Jean

[Hanbing59]

According to @AndreHauschild's reply under the discussion#417, the CRF case may be applied in slrProcessing where the attitude file is not mandatory.

For "why is the accBias is in SRF", i think at here, the AccBias is mainly for considering the calibrations of accelerometer measurements which are normally made in SRF.