I’m currently using SAR images to study the displacement of the ground in the Jakarta Area. Usually I did the job with SRTM3sec but in some tutorial I saw 1sec was using so I decided to try with kind of combination :
FullSRTM3sec for traitement and for the Range doppler correction
FullSRTM1sec for traitement and for the Range doppler correction
FullSRTM1sec for traitement and SRTM3sec for the the Range doppler correction
FullSRTM3sec for traitement and SRTM1sec for the the Range doppler correction
I saw some different pattern and also the SRTM1 sec seems to have some lack of data in water / deltas zones. But the most important is the data generally. I read here it’s not gonna big change and sometimes better SRTM can putting more noise than taking a “normal” or less accurate DEM.
Here the picture, red indicate uplifting and blue indicate subsidence even if we don’t have this time (values are took by the maximum of subsidence in south-west)
yes, this is what I was thinking as well. The water is not the problem, because it is at the edge of your area of interest. Also, the DEM has no greater impact. But the interferogram contains many patterns which are not related to displacement (and some decorrelated areas at the right bottom).
Are these images from the rainy season?
The one I give come from 11 oct to 4 nov looking the precipitation in indonesia the rainy season start oct / november to end of march i can show you different interferogram with timeline.
hm, I see little correspondence within the different interferograms. Only a small fraction will be attributed to actual deformation. Would Persistent Scatterer Interferometry be the better choice here?
I think yes, I follow most of tutorial for insar Time-series and I only look subsidence. The problem is I doing only with step by step so it take time to generates stuff.