I am having some issues processing some GRD images applying the BNR step.
I’m processing this image
and the steps so far used are:
- subset [using as AOI POLYGON((-6.1851371215820405 53.391095819496975,-6.095529882812509 53.391095819496975,-6.095529882812509 53.34356953973678,-6.1851371215820405 53.34356953973678,-6.1851371215820405 53.391095819496975)) ]
- apply the orbit file
Well, after the BNR most of the pixels on the water are replaced with a NaN value like in this figure
On the opposite, if I don’t apply any subsetting no NaN values are in the image after the BNR
Do you know why this difference? Is necessary always apply the BNR to the whole image without any subsetting? My idea was to reduce the size of the image just around my AOI to speed up the processing.
Thanks in advance for any suggestions.