CunrenLiang

Results 2 issues of CunrenLiang

These updates are for removing azimuth burst ramps caused by ionosphere in the ionospheric correction in topsStack. The updates are only within this module.

This PR mainly makes modifications to alos2App/alos2burstApp/alosStack to support more robust ionospheric correction and easier running of alosStack. Changes are therefore limited to: isce2-main/contrib/stack/alosStack isce2-main/components/isceobj/Alos2Proc isce2-main/applications isce2-main/examples/input_files/alos2