Omega-K algorithm implementation for synthetic aperture radar 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)
IFFT


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.
I am using this link for getting the reference by Richard Balmer : 

There are no references 30 and 32