How to generate spatial and temporal baseline plots in ISCE (or other software)?

[leeyhgeo]

Hello,

I'm planning to conduct SBAS InSAR analysis and I've collected all ERS, Envisat, and Sentinel-1 SAR images over my study area. Now I would like to draw spatial and temporal baseline plots (as the figure below) of these images to determine which image pairs are suitable for further analysis. However, I have no idea how to get baseline information. I'm wondering if there is any function in ISCE (or other software like SNAP) that can generate spatial and temporal baseline plots.

Thank you in advance!

Figure source: https://www.researchgate.net/figure/Baseline-plots-of-interferograms-used-in-SBAS-a-and-PSInSAR-b-The-interferograms_fig1_348937233

[fdelgadodelapuente]

The stripmap stack processor will generate such a plot for ERS and ENVISAT data.

[AP2607]

How to plot for S-1 IW?

[fdelgadodelapuente]

The TOPS stack processor does not have a routine to generate such a plot. You will have to extract the baseline information and create one in either Python or Matlab.

[AP2607]

Is it possible to extract baseline information about the entire dataset (without setting master acquisition)?

[fdelgadodelapuente]

No, you need to set a reference image. However, topsApp.py will calculate the Perp for every processed pair at step computeBaselines

You can also use the SBAS utility at ASF Vertex to generate a baseline plot

[AP2607]

Ok thanks.

[fdelgadodelapuente]

First, you need to unpack the data with unpackFrame_ENV.py and unpackFrame_ERS.py

[leeyhgeo]

I've tried unpackFrame_ERS.py and I encounter errors. I think there're some bugs in the original code. I'm trying to debug. Have you tried unpackFrame_ERS.py and faced some errors as well?

[fdelgadodelapuente]

Yes, it works fine. You need to edit the code to set tup the path to the ERS-1/2 ODR/PCR orbits.