*3.1. Dataset*

Two public datasets SSDD [33] and HRSID [34] are used in our work. SSDD is available online at https://github.com/TianwenZhang0825/Official-SSDD (accessed on 1 March 2022). HRSID is available online at https://github.com/chaozhong2010/HRSID, accessed on 1 April 2022. SSDD offers 1160 samples collected from RadarSat-2, TerraSAR-X, and

Sentinel-1. Polarizations are HH, VV, VH, and HV. Resolutions are from 1 m to 10 m. The test set has 232 samples with the filename suffix of 1 and 9. The remaining samples constitute the training set. HRSID offers 5604 samples collected from Sentinel-1 and TerraSAR-X. Polarizations are HH, HV, and VV. Resolutions are 0.5 m, 1 m and 3 m. The training set has 3642 samples and the test set has 1962.
