Seasonal SLC filtering for snowy regions

[Shima-shoki]

Thank you very much for making this excellent project available as open-source software.

I am currently applying the software to several regions to examine what can be captured in the outputs. One point that caught my attention is that the software currently does not appear to support seasonal filtering of SLCs, which could be problematic in snowy regions.

The attached results show the Kashiwazaki region in Japan, where groundwater extraction has caused land subsidence of approximately 0.5–1.0 cm/year. This area experiences snowfall in winter, with maximum snow depth reaching around 80 cm during December–March. The time series appears to show a clear seasonal pattern associated with the summer–winter cycle.

If I want to limit the analysis period to spring–autumn, is there a recommended way to achieve this with sweets? I understand that it may be possible to repeat the analysis for multiple years by specifying only the target periods of interest, such as 2022-04-01 to 2022-11-01 and 2023-04-01 to 2023-11-01, but this would make the processing somewhat more complicated.

Therefore, I would like to ask whether it would be possible to add an option to limit GSLC generation to specific months or seasonal periods. In addition, can Dolphin and the underlying algorithm handle displacement time series with such temporal gaps?