期刊名称：ISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences
印刷版ISSN：2194-9042
电子版ISSN：2194-9050
出版年度：1998
卷号：XXXII Part 4
出版社：Copernicus Publications
摘要：In the framework of the Shuttle Radar Topography Mapper (SRTM) Mission the generation of high-quality DigitalElevation Models (DEMs) with global coverage of the earth's surface is envisaged. In this mission, which is scheduled forlate 1999 on NASA's space shuttle, single-pass Interferometric Synthetic Aperture Radar (InSAR) data will be acquiredand processed. The German Aerospace Center DLR will process, archive and distribute the data delivered by the Xbandsystem X-SAR. In preparation for this mission DLR's Remote Sensing Data Center (DFD) is implementing anInSAR processing chain for the derivation of DEMs, which provides operational product generation as well as multimissioncapabilities. This comprises subsystems for screening and transcription, the interferometric SAR processing, thegeocoding and mosaicking, and the database system for efficient handling and archiving of multi-resolution DEMs.The paper at hand describes the generation of DEM mosaics from different sources, primarily based on interferometricSAR. The main parameters, which influence the accuracy of the height determination, are briefly discussed and theconcept of height error maps, representing the accuracy of the corresponding DEMs, is outlined. The mosaicking of theDEMs resulting from various sources, mainly ERS tandem data from ascending and descending orbits, is described. Themosaicking takes into account the different prior accuracy of the DEMs and derives the quality of the resulting DEM. Themethod is illustrated by practical examples and an outlook is given on further investigations.
