Regarding decomposing LOS displacement into vertical and horizontal components

[Anonymous]

Hello, 

I'm using Mintpy to decompose the LOS displacement using the following: 

asc_desc2horz_vert.py ascending_velocity.h5 descending_velocity.h5 -g ascending_geometry.h5 descending_geometry.h5 -o horizontaldisplacement.h5 verticaldisplacement.h5

I'm writing to check if there is a way to perform the decomposition on the displacement (using the timeseries.h5 file) instead of the velocity? I get an error when using the timeseries data saying it's an unsupported file. 

Thank you!

[Ditasaka]

Hi,
Unfortunately, it is not possible to use cumulative data.

[Manudeo Singh]

Yes, you can decompose the time-series as well. Here are some guiding steps:

1. Read asc and desc timeseries dataset using xarray 

2. Use ds.resample(time='1MS').mean() to resample monthly (or semi-monthly). Here, goal is to align both timeseries to same dates

3. Use  asc_desc2horz_vert script to decompose each time-step (use a loop maybe or ufunc of xarray) - or write your own decomposition equations - for guidance, read  asc_desc2horz_vert.py script in notepad. 

I am in the process of making a Jupyter notebook available for these kinds of calculations, it will be available publicly in a few weeks. Meanwhile, these steps can help you. 

Best wishes,

Manu

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Dr Manudeo Singh Royal Society - Newton International Fellow Department of Geography and Earth Science Aberystwyth, Wales, UK Website: ResearchGate | Google Scholar

[Sven Borgstrom]

Hi Manu,
that's a good news.
Plese keep us informed when you set up the notebook.
I'm a researcher working in a volcano observatory and we set up a dense GNSS netwok in our AOI for monitoring purposes.
I would be glad to carry out some cross-comparisions between data/results from our GNSS net and the Vertical and E-W components of ground motion from InSAR, exploting your notebook.
Nice,
Sven.