NDLI: On the potential of current measurements by spaceborne along-track InSAR for river runoff monitoring

Content Provider	IEEE Xplore Digital Library
Author	Romeiser, R.
Copyright Year	2005
Description	Author affiliation: Inst. of Oceanogr., Hamburg Univ., Germany (Romeiser, R.)
Abstract	The global monitoring of volume transports of large rivers is a challenging technological problem with a number of important applications. It is highly desirable to use satellite-based remote sensing techniques for consistent worldwide measurements on a regular basis. While water level measurements in rivers with spaceborne altimeters have already been demonstrated a few years ago, instruments for routine current measurements from space have not been available until now. This will change with the advent of along-track interferometric synthetic aperture radars (along-track InSARs) on upcoming satellites such as the German TerraSAR-X, which is scheduled for launch in 2006. In this paper we evaluate the potential of such instruments for current measurements in rivers. We consider fundamental theoretical issues as well as existing InSAR data from the Shuttle Radar Topography Mission (SRTM) and numerical simulation results. We find that currents in the Elbe river estuary (Germany) can be derived from SRTM data quite well. A similar data quality is predicted for TerraSAR-X. We discuss the potential of TerraSAR-X for routine current measurements in rivers and propose the development of a comprehensive data synthesis system which combines water level and current data from satellites and other sources in such a way that a maximum amount of information on river is obtained.
Starting Page	787
Ending Page	792
File Size	1369523
Page Count	6
File Format	PDF
ISBN	0780391039
DOI	10.1109/OCEANSE.2005.1513156
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2005-06-20
Publisher Place	France
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Current measurement Synthetic aperture radar interferometry Rivers Spaceborne radar Remote monitoring Space technology Instruments Satellites Level measurement Extraterrestrial measurements
Content Type	Text
Resource Type	Article

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