Radar, Amplitude, Phase und Interferometrie Detection - RAPID Endbericht

Abstract

RAPID was a joint project of the Deutschen Fernerkundungsdatenzentrum (DFD) and Institut fuer Hochfrequenztechnik from the German Aerospace Center (DLR) and Institut fuer Nachrichtenverarbeitung from the University GH-Siegen as partner. The goal was to develop and approve theories, algorithm and processingssystems to use the interferometric data from ERS. In a preoperational processing chain it is possible to generate coherence - and phase products and as final results digital elevation models (DEM). These products can be used by other projects, therefore other geoscientist must not developed these basics products for there applications. Specially DEMs are very necessary and useful. In various test regions the accuracies were investigated. The DEM from ERS tandem have an height accuracy of about 10 m and a geometric resolution of 30 m x 30 m. The preoperational system developed in RAPID in the basis for the InSAR systems for SRTM in 1999 and ENVISAT in 2000. In RAPID also the SAR processing, the coregistration of SLCs and the phase unwrapping was approved. With the chirp-scaling technique complete ERS are processed and up to ten datasets were coregistered. Special filter operations guarantee sufficient result in area with low coherence (<0.3). The phase unwrapping was approved by a new approach, the 2-dim Kalman filter. This filter was developed, implemented and tested with ERS data. (orig.)SIGLEAvailable from TIB Hannover: F99B32+a / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekBundesministerium fuer Bildung, Wissenschaft, Forschung und Technologie, Bonn (Germany); Deutsche Agentur fuer Raumfahrtangelegenheiten (DARA) GmbH, Bonn (Germany)DEGerman