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Techniques and applications of SAR interferometry for ERS-1The ERS-1 Synthetic Aperture Radar (SAR) demonstrated that it is possible to measure high resolution topography over large areas using interferometry with repeat orbit data sets. Given that the ERS-1 orbit is known with high precision, an automatic system for generation of interferograms is presented. Least squares estimation using ground control points provides an accurate method for determining the precise interferometric baseline. The system parameters which affect the accuracy of the Digital Elevation Models (DEM's) are errors in the interferometric baseline, decorrelation caused by baseline separation, thermal noise, and surface change. An adaptive filter based on the local interferometric coherence was developed to improve phase unwrapping of the interferogram. Final accuracies of the DEM's generated for single scene pairs in Alaska (U.S.) and Bonn (Germany) are on the order of 5 to 10 m.
Document ID
19940028062
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Werner, Charles L.
(Zurich Univ. Switzerland)
Small, David L.
(Zurich Univ. Switzerland)
Rosen, Paul A.
(Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Hensley, Scott
(Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Zebker, Howard A.
(Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Date Acquired
August 16, 2013
Publication Date
December 1, 1993
Publication Information
Publication: CNES, From Optics to Radar, SPOT, and ERS Applications
Subject Category
Earth Resources And Remote Sensing
Accession Number
94N32568
Distribution Limits
Public
Copyright
Other

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