GAMMA Questions

Hi All,

I took an ALOS PALSAR data (width:3500 & line:10000) of FBD pol, then multilooked it 1:4 ratio, so now the dimension of the MLI image is 3500*2500, and the resolution of the multilooked image comes out to be around 12.8*14.0 m2. Now, I want to geocode this with the help of 30m resolution SRTM DEM.

First, I created parameter file for DEM in UTM projection with delta_y=-15.0m & delta_x=15.0m (using 'create_dem_par'), them using 'dem_trans' I converted the DEM from EQA to to UTM projection where I set lat_ovr=1, lon_ovr=1. After the look-up table generation, the width of the dem_seg file is coming as 3948. When I am resampling the simulated sar image using 'geocode' program, in the output, after some 800 odd lines, the remaining lines are coming as completely black.

For this reason, an error is coming "ERROR: number of zero values in MLI-2 image patch exceeds threshold: 131072" in 'init_offsetm' step. I am not able to figure it out the issue. Kindly help.

Here, I have attached images of some of the o/p files. It may help you to identify the mistake I have committed.

Thanks in advance.
Best wishes,
Tapas Dey