Terrain Flattening on ALOS L 1.1 Beta0 (dual pol)


I am processing ALOS-2 CEOS L 1.1 (StripMap mode, SM3, dual pol). When I run the radiometric terrain flattening by selecting Beta0_HH and Beta0_HV the result is Gamma0_HH (all 0s) and Gamma0_HV (looks fine). Why does the terrain flattening result in all 0s for HH polarisation and works only for HV? Can the two polarisation not be terrain flattened at the same time?

Many thanks!

currently, the terrain flattening operator only works on one band: Terrain Flattening Correction
We want to change this in future versions.

Thanks @ABraun!