During interferogram generation, you are using already focused data as input. So, if you uncheck the orbital accuracy box, that will not affect the focusing. Focusing will still have been performed using the precise orbital data.
What happens, though, if you check the Orbital Accuracy option under Default Values > Coregistration, is that during the coregistration step, the accuracy of the coregistration polynomial will be checked against the precise orbital parameters. If you don't select Orbital Accuracy , then that check will not be made.
If you would like to try to get this to run with the Orbital Accuracy option selected, then you might try the following:
Change the following values under Default Values > Coregistration (and you might need to play around with even larger values if these don't work):
Range Window Number 10 instead 6
Azimuth Window Number 15 instead 9
in CROSS CORRELATION GRID sub section
Range Window Size 512 instead 256
Azimuth Window Size 1024 instead 512
In FINE SHIFT PARAMETERS sub section
Range Window Number 40 instead 20
Azimuth Window Number 40 instead 20
I hope that helps.
- Peg
Exelis VIS Technical Support
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