This not only minimizes the coherence loss, it also minimizes any potential ground motion. You need to pick a pair that has the least temporal baseline possible. Images with different flight directions (ascending vs descending) cannot serve as pairs for interferometry.Ĭoherence is key. Pairs must be of the same path number and must cover the same area.
The optimum pair for DEM creation would have a large perpendicular baseline and a small temporal baseline. The baseline tool can be accessed as a stand-alone tool, or via a Vertex search. The user first creates an interferogram, and completes the appropriate phase unwrapping steps, then creates the DEM.ĪSF’s baseline tool may be used to select a pair of Sentinel images to create the DEM.
This recipe allows the user to create a Digital Elevation Model (DEM) product from two Sentinel-1 SLC scenes.
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