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Add option to resample frequency B interferograms to the main radar grid#267

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oberonia78 wants to merge 6 commits into
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oberonia78:oversample_side_iono
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Add option to resample frequency B interferograms to the main radar grid#267
oberonia78 wants to merge 6 commits into
isce-framework:developfrom
oberonia78:oversample_side_iono

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This PR adds options to resample the frequency B interferogram to the frequency A interferogram grid. Previously, frequency A was decimated to the frequency B grid before ionosphere estimation.

The PR includes the following updates:

  • Updated interpolate_freq_b_array to support complex interferograms.
  • Added the iono_radar_grid option, which can be either main or side.
    • If iono_radar_grid is set to side, the frequency A interferogram is decimated to the frequency B grid. This is the current/default approach.
    • If iono_radar_grid is set to main, the frequency B interferogram is interpolated to the frequency A grid.
  • Added unwrapping support for GDAL-supported files. Previously, unwrap.py was designed to work with HDF5 files. The new unwrapping function can read files supported by GDAL.

@hfattahi hfattahi added this to the R05.02.0 milestone May 20, 2026
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