This issue was originally reported in the internal repository (Issue n. 141) on January 5, 2024.
It occurs in regions with steep terrain, where areas not observed by the radar are assigned NaN values. In GCOV browse images and QA reports, these NaN values appear “expanded”, exaggerating their extent.
The example below shows GCOV outputs from a Sentinel-1 dataset acquired over the Himalayas and converted to PNG using PLAnT:
In the corresponding GCOV browse image, the NaN regions appear expanded due to multilooking:
The QA report shows the following images, where the NaN regions are expanded even further:
More details can be obtained in this discussion here.
This issue was originally reported in the internal repository (Issue n. 141) on January 5, 2024.
It occurs in regions with steep terrain, where areas not observed by the radar are assigned
NaNvalues. In GCOV browse images and QA reports, theseNaNvalues appear “expanded”, exaggerating their extent.The example below shows GCOV outputs from a Sentinel-1 dataset acquired over the Himalayas and converted to PNG using PLAnT:
In the corresponding GCOV browse image, the
NaNregions appear expanded due to multilooking:The QA report shows the following images, where the
NaNregions are expanded even further:More details can be obtained in this discussion here.