Hello forum.
I am trying to pre-process 09XT data of ASTER but I think it was different from L1B data processing

When I trying to change RPC situation from ENVI header (RPC or RSM) it gives error and wanting to be imported RPC coefficient containing file

I am thinking first I have to start orthorectification later then start preprocessing steps but I don't know how to apply orthorectification to the 09XT data

do you help me ?