February 24, 2020, 3:15pm
I have three S1 SLC datas(different times)，and I want to calculate the ratio of the backscatter coefficients between them.The processing steps I am using is as follow:
But there would be a
error ‘0’ when I run DEM-Assisted Coregistration.What’s wrong with my processing steps?And what should I do next?
February 24, 2020, 3:37pm
what DEM did you use for the coregistration? Maybe your images are outside the SRTM coverage?
February 24, 2020, 4:19pm
SRTM 3Sec.And my study area is In China,Altai Mountains .
I found if I input the images (calibration->Deburst->Multilook) when I run DEM-Assisted Coregistration, there wouldn’t be a
error ‘0’.And now it is running slowly,I haven’t got the results yet.
If it works fine,can I keep doing Speckle filtering and Terrain Correction?And compared to the DEM-Assisted Coregistration,maybe I can also run
coregistration->stack tools->create stack
?(I saw this from other post)
February 24, 2020, 7:02pm
for SLC data, this is not exact enough. I suggest using GRD products, apply Calibration and then Coregistration and in the end Terrain Correction.
SLC data is only suitable if you need the complex pixel information.
February 25, 2020, 8:09am
Thank you for your answer!
Because I also want to run H/α decomposition,so I choose to use SLC data.
And for SLC,if now I need to calculate the ratio of the backscattering coefficients between three images(different times),could you tell me a complete processing procedure?
February 25, 2020, 8:17am
you find suggestions for both products here:
Radiometric & Geometric Correction Workflow