STaMPS water mask?

Microwave Toolbox StaMPS
1

Hi!

I am using STaMPS since a few weeks now, and have set up a test case to get some experience with the processing flow and functionalities within STaMPS. I have chosen an Island in the Netherlands (Marken Island), to see whether it is possible to estimate some deformation time series on the dike surrounding the island. I have got some nice results, but still have a couple of questions regarding the processing.

  1. There are a lot of PS selected on the water. Why are these pixels selected as PS? And is it possible to include a mask to exclude these pixels from the processing? I also see some PS close to the dike which are on the edge of the water boundary and the dike. What is the accuracy of the georeferencing process of STaMPS?
  2. If I look at a LOS displacement of a PS, how do I know the point to which this deformation is related? Is there a reference point to which the deformation is related and how do I know where this point is?

Hopefully you will be able to answer (some of) my questions :slight_smile:

Kind regards,
Joost

Time_series_example
Time_series_example.jpg1853×970 35.9 KB
time_series_overview
time_series_overview.jpg1853×970 100 KB
Time_series_example
Time_series_example.jpg1853×970 35.9 KB
time_series_overview
time_series_overview.jpg1853×970 100 KB

1 Like
2

I have the same problem.have you solved it?

3

You can apply a water mask in SNAP before running the StaMPS export.

When it comes to the georeferencing of the PS, things are a bit more complexe.
One must not forget that even if the PS is represented by point the displacement is actually measured on the whole pixel. SAR pixels contains the sum of the contributions of the different elementary scatterers contained within the pixel’s area, and since water gives very little to no returns and the pixel got selected as a PS (meaning consistent returns throughout time) it’s safe to assume that the displacement measured on that pixel are that of the dike.

4

Thank you for your advice, although I use GAMMA.You gave me a new idea.
I also want to ask, StaMPS has any good way to get rid of the atmospheric effect?And how could I do superimpose the map output by STAMPS on the base map?Like satellite imagery multiview or Google Earth.