[quarterdime]

Thanks for the arcgis link. It is interesting to compare to the Sentinel 1A data from the study[0]. For example there is one existing (ground based) measurement East of Mont Belvieu (P050), but most of the displacement in the satellite data appears just to the West, centered on Mont Belvieu. This is by eye only, so I may be mistaken in comparing the locations.

The ground based measurement for sensor P050 reports up-down displacement of -0.07 cm per year between 2017 and 2020.

It is difficult to determine the exact value from a shaded image, but the satellite data show that just to the West of this ground based measurement (about centered on Mont Belvieu), displacement was -1.91 to -0.85 cm per year between 2016 and 2020 (see figure 3b).

The arcgis site has useful data that could be used better compare trends for the same dates [1]. I did not look at every year, but it looks like 50+ ground based measurements per year. The study's methods are a bit beyond me, but section 3 describes processing a total of 89 Single Look Complex (SLC) images from 2016 to 2020. I could not find any mention of exact dates.

[0] https://www.mdpi.com/2072-4292/14/15/3831# [1] https://hgsubsidence.org/GPS/2021/P050_HRF20_neu_cm.col