Abstract
The German Remote Sensing Data Center (DFD) is developing the satellite-data information system ISIS as central interface for users to access Earth observation data. ISIS has been designed to support international scientific research as well as operational applications by offering online database access via public networks, and is integrated in the international activities dedicated to catalogue and archive interoperability. A prototype of ISIS is already in use within the German Processing and Archiving Facility for ERS-1 for the storage and retrieval of digital SAR quicklook products and for the Radarmap of Germany. An operational status of the system is envisaged for the launch of ERS-2. The paper in hand describes the underlying concepts of ISIS and the recent state of realization. It explains the overall structure of the system and the functionality of each of its components. Emphasis is put on the description of the advisory system, the catalogue retrieval, and the online access and transfer of image data. Finally, the integration into a future global environmental data network is outlined.
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