How to use polarimetric module in SNAP?

[ABraun]

Sentinel-1 (and many other SAR satellites) only operates in single or dual polarisation. For the polarimetric matrix generation and most other PolSAR applications) you need quad-polarized data (HH/HV/VH/VV) which is acquired by only few SAR satellites (ALOS, Radarsat, few TerraSAR-X scenes).

Please also have a look at this post:

Sentinel-1 SLC Polarimetric Decomposition

most of the decompositions require 4 polarizations: HH, HV, VH and VV. However, most of the Sentinel-1 data in IW mode is in only one or two polarizations: There are studies which apply decompositions on dual polarized SAR data: You can chose the Entropy-Alpha Dual Pol Decomposition for a try. [image] It is discussed in other topics if it makes sense: