Hi @ABraun, @annamaria, @Katherine, @junlu
First of all, many thanks for share your steps in this forum… it has been very helpful for me.
I have process Sentinel, ERS and ENVISAT images in order to obtain PS points.
I have followed the methodology described by @Katherine and the one described by @annamaria. I have take cared of apply topo phase removal individually as mentioned @annamaria.
In the case of Sentinel I have run all the process (SNAP + StaMPS) without any errors and the results obtained are the ones expected (There are PS mainly over urban áreas).
However, for both ERS and ENVISAT cases, I obtain PS’s in vegetated or forest áreas…
What may be the cause of this error???
The workflow followed for ERS and ENVISAT has been the next one:
1- Apply orbit file (DORIS for ENVISAT and DELFT for ERS)
2- Coregistration (master-slave pairs) (1=master+2, 1+3, 1+4,…)
4- TC (1+2, 1+3, 1+4, …)
5- Interferogram formation based in the output of 3-
6- Topo phase removal
8- Add elevation band (Inf_1+2, Inf_1+3, Inf_1+4…)
9- StaMPS export of : Results of 4- and 8- . Note that this step has been carried on individually because exporting all the pairs in one stack, I have obtained NaN values in .base files. That is to say:
I first export
- 1+2 and Inf_1+2, then
- 1+3 and Inf_1+3, then
- 1+4 and Inf_1+4…
I will appreciate if any of you could help me please…