I'm using TIMESAT for time-series analysis and Landsat 7-8 Collection 1 images. Within this process I would like to use Landsat pixel quality band for assigning reliability degrees to the pixels using the pixel QA band.
When using CFMask Band the range is easily defined (0 clear; 1 water;2 cloud shadow; 3 snow; 4 cloud). But when I try to use the Pixel QA band the pixel values were different than the values for interpretation given at https://landsat.usgs.gov/landsat-surface-reflectance-quality-assessment.
I have the opportunity to use QGIS, ArcGIS and ENVI for image processing.
How I can use or process the pixel QA band?