Published 2023-04-27
Keywords
- interferometry,
- Sentinel-1,
- DSM generation,
- accuracy
How to Cite
Copyright (c) 2023 European Journal of Geography
This work is licensed under a Creative Commons Attribution 4.0 International License.
Abstract
Digital Surface Model (DSM) generation can be achieved through radar
interferometry, utilizing the phase difference between the representations of the
interferometric pairs. Interferometry is a widely used height information acquisition
technique for large areas. Sentinel-1 continues the C-band SAR Earth Observation
heritage of the European Space Agency satellites like ERS-1, ERS-2 and ENVISAT.
This paper discusses DSM generation utilizing Sentinel-1 radar data through
interferometric process in two different study areas in Greece.
DSMs generated from Sentinel-1 data were analyzed and compared to freely available
DSMs like ASTER GDEM and SRTM DEM, to DSMs created from optical remote
sensing data and to DEMs created from digitized contours from the 1/50.000
topographic maps.
The influence of the interferometric pairs baseline and the role of the different tracks
to the DSM vertical accuracy was examined. Points of known elevation have been
used to estimate the accuracy of the DSMs. 2D RMSE, correlation and the percentile
value were computed and the results are presented.