At successful exit the process control flag is switched on:
subtr_refdem: 1
The output (in the products result file) looks like:
******************************************************************* *_Start_subtrrefdem ******************************************************************* Additional_azimuth_shift: 1 Additional_range_shift: -2 Data_output_file: Outdata/cint.minrefdem.raw Data_output_format: complex_real4 First_line (w.r.t. original_master): 245 Last_line (w.r.t. original_master): 14964 First_pixel (w.r.t. original_master): 7 Last_pixel (w.r.t. original_master): 3998 Multilookfactor_azimuth_direction: 40 Multilookfactor_range_direction: 8 Number of lines (multilooked): 368 Number of pixels (multilooked): 499 ******************************************************************* * End_subtrrefpha:_NORMAL *******************************************************************
Figure 27.1 shows the result of subtracting the reference phase of the radarcoded DEM from the interferogram (See Figure 25.1). It can be seen the number of topographic fringes is reduced, though there still remain some residual effects. A next version of Doris will include an option to first correlate the radarcoded DEM with the interferogram, to find an additional offset. The radarcoded reference DEM is then shifted on (multilooked) pixel level before subtraction.
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