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yumorishita / LiCSBAS

LiCSBAS: InSAR time series analysis package using LiCSAR products
https://doi.org/10.3390/RS12030424
GNU General Public License v3.0
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Does this code have splicing function #147

Closed ThreeIcug closed 2 years ago

ThreeIcug commented 2 years ago

Dear author, LiCSBAS have provided a very convenient and fast method to get the time series of InSAR. Because the earthquake happened at the junction of the two images. A single image can't show all of the influence region. Does this code have a splicing function. I read the wiki ,but i can't find it.

yumorishita commented 2 years ago

The input GeoTIFF files can be merged by gdal_marge.py.

ThreeIcug commented 2 years ago

Thank you for your timely help.

ThreeIcug commented 2 years ago

I think the script can merge the cc , unw and the other .tif file. The cc and unw can named as same as the old, but what names should I give to the geo , mli and hgt file. In addition, how to deal with the baselines and metadata.txt file.

yumorishita commented 2 years ago

I think either name should be OK for mli etc. though I have never tried merging. I also realized that there could be phase biases between unw files and they should be removed using overlapping areas.

ThreeIcug commented 2 years ago

Yes, I merge the data, the problem that you realized is happened. Screenshot from 2022-05-07 22-55-47 How can I remove the phase biases.

yumorishita commented 2 years ago

Compute the phase difference in the overlapping area and its average (e.g., by gdal_calc.py), then subtract the average from the one data. I am not sure if this works well. Otherwise, you could produce the interferograms covering the area of interest from the SLC yourself.