METHOD. This research method is normative juridical with a statutory and comparative approach. The research methodology used is doctrinal legal research. Doctrinal legal research is the study of legal rules, principles, concepts or doctrines.
METHOD. The main steps for generating absolute ZTD maps from a stack of Single Look Complex (SLC) Sentinel-1 SAR images are outlined in Figure 1. The procedure combines into a unique processing chain both standard techniques and some novel contributions to enhance the quality of the estimated water vapor maps. * Corresponding author Precise DEM orbit file GACOS Absolute ZTD maps (GeoTIFF) Mask Nodata filling worldfile Absolute ZTD maps (JPEG) Mask Absolute ZTD maps (GeoTIFF) JPEG to GeoTIFF conversion GeoTIFF to JPEG conversion Master reconstruction ZTD MAP ESTIMATION PRE-PROCESSING The proposed methodology exploits the availability of a stack of complex SAR images acquired over the same area at different epochs to estimate the difference in the optical path between radar and ground targets (Ferretti et al., 2007).