Regarding decomposing LOS displacement into vertical and horizontal components

Anonymous

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Jul 4, 2025, 11:24:53 PM7/4/25

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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

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Jul 9, 2025, 12:07:54 AM7/9/25

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

Manudeo Singh

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Jul 9, 2025, 9:41:02 AM7/9/25

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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

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Sven Borgstrom

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Jul 15, 2025, 8:59:45 AM7/15/25

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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.

Sankhadip Biswas

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Mar 20, 2026, 1:31:55 AM (3 days ago) Mar 20

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Hi Dr. Manudeo,

Could you please share if you were able to set up the notebook? Your help is much appreciated.