Hi @shen, the set of six UAVSAR polarimetric .grd files include all the cross-channel and co-polarization polarimetric information in geocoded and terrain-corrected images. I am not an expert on polarimetric analysis, so I can’t explain how to extract the phase, but it is in the products. These are the six products for one scene:
SanAnd_31901_21042_000_210527_L090HHHH_CX_01.grd 25-Jun-2021 14:21 1G
SanAnd_31901_21042_000_210527_L090HHHV_CX_01.grd 25-Jun-2021 14:20 2G
SanAnd_31901_21042_000_210527_L090HHVV_CX_01.grd 25-Jun-2021 14:20 2G
SanAnd_31901_21042_000_210527_L090HVHV_CX_01.grd 25-Jun-2021 14:20 1G
SanAnd_31901_21042_000_210527_L090HVVV_CX_01.grd 25-Jun-2021 14:21 2G
SanAnd_31901_21042_000_210527_L090VVVV_CX_01.grd 25-Jun-2021 14:20 1G
The .ann file has all the metadata about the files.