I have been working with 33 Sentinel 1(mid 2019-2021) images on a Mater area of Radius 10Km in a mountainous region under small scale earthquake deformation study. In the APS estimation for the estimated parameters especially the Integrated Velocity shows spatial ramps in the inverted residuals estimation. I have gone through almost all the discussions regarding the spatial ramps , the quality of the images downloaded was also considered other than the graph connections ,Interferograms, coherence, NL weighting, and the processing parameters. Also I have reduced the size of the master area and tested as I am working on an evaluation version of Sarproz. I got through these ramps in few cases (not convinced) 1. when I remove the 3 Sentinel images for the month of late February and March 2021 keeping the stack of 32 from 35 2. when I reduce the study area to around 12Km to 8Km specifically targeting the Urban areas 3. when I use Inverted parameters (flatten). 4. For co-registration using orbits and external DEM
I have tried many ways to reduce these patterns for last few months but bit confused and need some advice on where to conduct more detailed investigation to reduce these.
This topic was modified 1 week, 4 days ago by dumindarw.