By default the rhow_* or Rrs_* outputs and derived products are masked using thresholds on the TOA reflectance in the 1.6 micron SWIR1 band and 1.3 micron CIRRUS band (if available). The default threshold for SWIR1 tends to remove most non-water pixels such as land, objects, and clouds, but could also mask areas with high glint or adjacency effects. The threshold method can also miss some non-water pixels such as cloud and mountain shadows.
Some examples of masking issues can be found in the forum:
here,
here, or
here
The thresholds are set to 0.0215 for SWIR1 and 0.005 for CIRRUS, and can be modified using the settings:
Code: Select all
l2w_mask_wave=1600
l2w_mask_threshold=0.0215
l2w_mask_cirrus_threshold=0.005
or entirely disabled by setting the following to False:
Code: Select all
l2w_mask=True
l2w_mask_water_parameters=True
l2w_mask_cirrus=True