Sentinel-1 Coherence change detection/eartquake damage in urban area

Microwave Toolbox
1

Hello everyone. I am new to forum and this is my first topic.

I want to do CCD in urban area to see effect of earthquake which is 6 february Turkey earthquake. Thousands of buildings collapsed so i thought i could detect it with sentinel1.
I have tried many different tutorials from youtube but either didnt worked or result was bad.

S1A_IW_SLC__1SDV_20230128T153358_20230128T153426_046986_05A2B6_1629
S1A_IW_SLC__1SDV_20230209T153357_20230209T153425_047161_05A88A_BB1A

Those are the 2 images i used. Before and after the EQ.
I got this kind of results like below which i do not really able to read.

resim_2023-08-19_194909314
resim_2023-08-19_1949093141010×836 90.3 KB

If i could get some help that would be perfect. I have deadline ahead and kinda panicked.

Thank you all in advance

2

Hi,
can you give some more details on what processing steps you have done and which software you have used. And then it might be easier to understand your output.

3

Hello,
i have followed this video just to try.
Steps are : Split, Orbit, Calibrate, Deburst, Multilooking, Terrain Correction. Then also making Geocoding and Coherence estimation.
I use SNAP software. All i want is as a result, a image shows changes between two dates with some spesific color.

Thank you

4

The image looks like intensity and not coherence. Multilooking is not advisable due to degradation of resolution. Also, coherence estimation needs to take place before geocoding.