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PPAC calibration

by Technical Evangelist ‎09-20-2019 08:39 AM - edited ‎09-20-2019 08:44 AM (97 Views)

Question

Do I need cross strips to compute the PPAC?

Answer

Cross-strips always help any calibration, self-calibration, or pcgrid generation.

However, it does not mean they are always absolutely necessary: it all depends on the error shape in camera space.

For DMC, PPAC calibration can help better fitting of GPS/INS, especially with very tight std_devs.

In any case, I would advise using PPAC calibration only if you have good distribution of control points.

If you do, run PPAC/FL calibration with all controls, then key in the calibrated values for PPAC/FL into camera file, and re-run AT with most of control points as check points. If you see improvement, use it.

 

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