The main variable of this product is a features categorisation mask, with :
- a vertical resolution of 60m between [ -1.02 km , 25.08 km ]
- colocated with the CLOUDSAT footprints ( ~1.1 km )
It also contains many variables extracted from the CALIPSO and CLOUDSAT products, sampled or interpolated to the DARDAR resolution.
– Cloud and Aerosols advanced Feature Mask |
– Simplified categorisation
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Some of the variables are stored as integers for saving disk space. For each variable, the user will find 2 standard SDS attributes called « scale_factor » and « add_offset ». Most of time, the standard HDF formula for scaling raw file values to physical ones is used :
science_value = ( raw_value – add_offset ) * scale_factor
Nevertheless, when a non standard scaling equation is used, this will be specified in a SDS attribute called « scaling_equation ».