Getting into Land Subsidence Mornitoiring using ENVISAT Dataset

Getting into Land Subsidence Mornitoring using ENVISAT Dataset

This post is about knowladge build of land subsidence mornitoring using ENVISAT1 dataset.

ENVISAT ASAR

(a) Illustration of ENVISAT ASAR geometry for the Wide-swath Mode, which consists of five narrow-swath beams, each covering a width between 70 and 100 km. Source: ESA 2002. The width of the wide-swath image is about 400 km. (b) Illustration and main terms of satellite SAR geometry. Source: Robinson 2004. Courtesy: Springer, Praxis Publishing Ltd2.

@ABraun3

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Stripmap data is less difficult, because you don't need Split, Deburst...

For using ENVISAT in StaMPS I recommend

Subset (if necessary)
Apply orbit file
coregistration (one master, multiple slaves)
Interferogram generation (including topographic phase removal)
StaMPS export with the outcomes of #3 and #4

So where do I download Envest images?

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here: https://esar-ds.eo.esa.int/oads/access/collection

Which image mode should I download?

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IMS because it has phase information.

Can I process different Tracks together?

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no, InSAR requires data from the same track.

Data Process

SNAP

  • Apply orbit file

  • Subset for ENVISAT dataset

    North

    West

    South

    East

POLYGON ((117.426 34.548, 116.711 34.548, 116.711 33.922, 117.426 33.922, 117.426 34.548))

subset by SNAP

POLYGON ((117.408 34.501, 117.408 33.922, 116.711 33.922, 116.711 34.501, 117.408 34.501))

  • Coregistration

Find optimal master, others options with default

  • Interferogram formation with topographic phase removal

StamPS-InSAR

StaMPS PS analysis is performed within MATLAB, using the main function stamps(), which takes the first and last StaMPS-step as main arguments. To run StaMPS complete with default arguments, use stamps(1,8)4.