In 1994 a new era in microwave remote sensing was started with the successful SIR-C/X-SAR missions. The integrated radar module SIR-C/X-SAR was the first multifrequency, polarimetric SAR-system monitoring the earth from space. The research project is focussed on the application of SIR-C/X-SAR data with the goal to develop methods and models referring to the geoscientific questions. Additionally the project is concentrated on the investigation of synergy effects between microwave and optical systems. In the period before the SIR-C/X-SAR missions multifrequency and polarimetric airborne SAR-data were investigated referring to geoscientific questions. The goal was the demonstration of the environmental and economic potential of this kind of data concerning: land use classification, hydrological investigations and the analysis of surface roughness phenomena. On the example of the test sites Makhtesh Ramon and Timna Valley in Israel it is exemplarely demonstrated which contribution can be realized with the multifrequency and multi-polarized SIR-C/X-SAR data in the geological oriented remote sensing. Lithological and tectonical investigations were hereby in the forefront. In the test site Oberpfaffenhofen measurements of soil moisture and surface roughness were carried out, because this test site was continuously monitored during the whole missions. On the example of different geoscientific questions it could be stated that the multifrequency and polarimetric SIR-C/X-SAR data have great advantages in comparison with conventional SAR-sensors (e.g. ERS-1/2, RADARSAT) based on this technical construction. Especially the multifrequency capability of the SIR-C/X-SAR system has to be estimated as an highlight for many investigations while the polarimetric data are suitable for the calculation of models and inversion algorithms. (orig.)Included 'Muenchner Geologische Hefte', A16, 1996SIGLEAvailable from TIB Hannover: F98B588+a / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekBundesministerium fuer Bildung, Wissenschaft, Forschung und Technologie, Bonn (Germany); Deutsche Agentur fuer Raumfahrtangelegenheiten (DARA) GmbH, Bonn (Germany)DEGerman
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