GAMMA Questions

Hi all~

I have processed some frames of GRD data with mk_geo_radcal, some work with
no problem, but some show error message as below in mode-1:

ERROR: Number of zero values in MLI-1 image patch exceeds threshold 131072.

However, the process can still proceed to mode-2, mode-3 with no error message
and I can still obtain final results.

As I checked the frames popping up error message, they are frames covering
coastal area with large area of NoData (value is zero) in DEM. Since the patch
is a 512 x 512 window, and 131072 happens to be half of 512 x 512, my guess is
that the error message is because of those NoData area in the frame.

I would like to confirm if my guess is correct, and will it influence the calculation
over area where there is valid data?

Thank you very much for you help :)

Best,
Jack