Open AccessCREATION OF A DIGITAL ELENATION MODEL BY THE METHOD OF RADAR INTERFEROMETRY
Author(s) -
E.N. Nafieva,
А. В. Гречищев
Publication year - 2020
Publication title -
èkologiâ. èkonomika. informatika. tom 2: geoinformacionnye tehnologii i kosmičeskij monitoring
Language(s) - English
Resource type - Journals
ISSN - 2500-123X
DOI - 10.23885/2500-123x-2020-2-5-96-103
Subject(s) - shuttle radar topography mission , digital elevation model , geocoding , interferometry , remote sensing , radar , elevation (ballistics) , computer science , software , geology , geography , computer vision , computer graphics (images) , mathematics , optics , physics , telecommunications , geometry , programming language
The article discusses the experience of applying the technique of constructing a digital elevation model (DEM) by the method of radar interferometry using Sentinel-1A / 1B data on the territory of the Amur region near the city of Svobodny in June 2019. The presented method, which consists of 9 main stages, is implemented in the PHOTOMOD Radar software package. The stages of processing include: loading the initial data and converting them into the internal format of the program; creating a project for processing and combining images of an interferometric pair (recalculating the raster of the auxiliary image into the geometry of the main image); construction pictures of interferogram and coherence and it is also possible to calculate pictures of phase and amplitude; filtering the interferogram and phase transformation (recalculation of the obtained values in meters); construction of a digital elevation model and its geocoding into a geographic coordinate system (WGS 84). After that, the results obtained are assessed and compared with the SRTM digital elevation model, namely, a visual comparison of two digital elevation models, their subtraction (SRTM – model obtained from Sentinel-1A / 1B data) and a comparison heights characteristic relief points. Also made conclusions and considered the possibilities of further projects