ScanSAR ionospheric correction application to MAI

[Sci123-lab]

Good day, I hope everyone is doing well here.

I was wondering about ionospheric correction in ScanSAR ALOS-2 dataset. I used both alos2App and alos2burst to process images pair. Alos2app generated interferograms (insar directory), ionospheric calculations (ion, and also corrected outputs in insar directory) and pixel offsets, if needed (dumped into dense_offset). Alos2burst, generated, apart from interferograms, ionospheric correction, and the azimuth deformation estimates (sd directory), and geocoded them as well.

My question is, if we compute azimuth deformation estimates (in meters), and they are impacted by ionosphere (as for example shown below), i.e., the stripes parallel to azimuth direction, and with a gradient in the range direction, how do we correct for that? Can we for example use estimates of ionosphere correction computed? The files under the folder ion---> are not geocode-able. I tried to geocode them using their full directory or the full names of the intfs from the ion-->upper, ion-->lower, and ion-->ion_cal directories through input xml but they can't be geocoded somehow. The other way, I thought of was to use the difference of original and corrected intfs (ionospheric correction applied) in the insar directory (from alos2app/alos2burst) to correct for ionospheric effect in MAI. Before proceeding and spending time on that, I was just wondering to confirm the accurate way of doing that, many thanks...

Any suggestion @CunrenLiang @EJFielding