I am running a project that has fixed tilt arrays in an east-west "dome" orientation. So half of the strings are tilted 5 degrees facing west, and half of the strings are tilted 5 degrees facing east. I need to get POA irradiance values (GlobInc). I am wondering how PVsyst calculates GlobInc when there are multiple orientations like this. Is it an average value for the whole site?