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AlexeyPechnikov / pygmtsar

PyGMTSAR (Python InSAR): Powerful and Accessible Satellite Interferometry
http://insar.dev/
BSD 3-Clause "New" or "Revised" License
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Input parameters info #106

Open antus opened 3 months ago

antus commented 3 months ago

Hi Alexey, I come back to you for a question regarding the parameters used in the SBAS Baseline. In the samples of landslides (Golden Valley, YamchiDam) you set different parameter values like "days", "baseline_pairs", "limit", "iterations", as the following extract: baseline_pairs = sbas.sbas_pairs(days=60)

optionally, drop dates having less then 2 pairs

baseline_pairs = sbas.sbas_pairs_limit(baseline_pairs, limit=2, iterations=2)

optionally, drop all pairs connected to the specified dates

baseline_pairs = sbas.sbas_pairs_filter_dates(baseline_pairs, ['2021-01-01'])

baseline_pairs

Could you please explain me the meaning in order to set my analysis parameters properly? I have the following AOI to analyse for the last 4 years: { "type": "Feature", "properties": {}, "geometry": { "coordinates": [ [ [ 15.441202320468705, 38.08053176221421 ], [ 15.441202320468705, 38.06973406684506 ], [ 15.46064854972468, 38.06973406684506 ], [ 15.46064854972468, 38.08053176221421 ], [ 15.441202320468705, 38.08053176221421 ] ] ], "type": "Polygon" } } Can you suggest me the starting notebook sample and correct parameters to use?

AlexeyPechnikov commented 3 months ago

In this context, the terms 'days' and 'meters' for baseline parameters are exactly as named. The appropriate choice depends on the coherence of your area and the accuracy of the DEM. You can begin with the example configurations and adjust them as necessary. Additional parameters and functions are designed to eliminate pairs that lack sufficient connections in the baseline graph.