I have been trying to develop Omega-k algorithm for SAR image formation. I am using the equations from chapter 8 in digital processing of Synthetic Aperture Radar data by Cumming and Wong. The steps I implemented are:
- Range compression
- Range IFFT
- Two DFFT
- Bulk Azimuth compression to a reference range (using eqn. 8.3)
- Stolt Mapping (using eq. 8.5)
I have confusions about the steps 4 to 6. Is there any norm for choosing the reference range in eqn. 8.3? I substituted eqn. 8.3 with 8.5 for stolt mapping and tried to interpolate the 2dfft spectra. However, the interpolation doesn't work. Do I need to compress the signal again after stolt mapping?
Any relevant answers will be highly appreciated. Thanks.