DocumentCode :
1527832
Title :
Combination of low- and high-resolution SAR images for differential interferometry
Author :
Guarnieri, A. Monti ; Rocca, F.
Author_Institution :
Dipt. di Elettrotecnica, Politecnico di Milano, Italy
Volume :
37
Issue :
4
fYear :
1999
fDate :
7/1/1999 12:00:00 AM
Firstpage :
2035
Lastpage :
2049
Abstract :
The authors propose a combination of low-resolution (LR) and full-resolution (FR) SAR images for differential SAR interferometry. The principal problem in such a combination is the volume scattering decorrelation that limits the useful baseline of the interferometric pair to very small, impractical values. A technique has been introduced to remove this decorrelation by exploiting a digital elevation model (DEM) of the area imaged. The resulting interferogram has the quality (in terms of coherence or phase noise standard deviation) of a conventional FR interferogram, but reduced geometric resolution. The technique is suited to those differential interferometry applications where the resolution of the “differential” phase field to be monitored is much coarser than that of local topography. As a possible application, they propose a system that exploits the wide swath imaged by low-resolution ScanSAR modes for frequent monitoring of hazardous areas
Keywords :
geodesy; geophysical techniques; radar imaging; remote sensing by radar; spaceborne radar; synthetic aperture radar; terrain mapping; topography (Earth); DEM; SAR; SAR image; differential SAR interferometry; differential interferometry; digital elevation model; full-resolution; geodesy; geophysical measurement technique; high-resolution; interferogram; land surface; land surface topography; low-resolution; radar remote sensing; synthetic aperture radar; terrain mapping; volume scattering decorrelation; Decorrelation; Digital elevation models; Earth; Earthquakes; Image databases; Interferometry; Monitoring; Scattering; Surfaces; Synthetic aperture radar;
fLanguage :
English
Journal_Title :
Geoscience and Remote Sensing, IEEE Transactions on
Publisher :
ieee
ISSN :
0196-2892
Type :
jour
DOI :
10.1109/36.774714
Filename :
774714
Link To Document :
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