NDLI: ERS-ENVISAT Permanent Scatterers

Content Provider	IEEE Xplore Digital Library
Author	Perissin, D. Prati, C. Rocca, F. Ferretti, A.
Copyright Year	2004
Description	Author affiliation: Dipt. di Elettronica e Informazione, Politecnico di Milano, Italy (Perissin, D.; Prati, C.; Rocca, F.)
Abstract	The phase time series of a perfect point-wise Permanent Scatterer (PS) would show a phase jump passing from ERS to ENVISAT SAR images. A PS analysis has been carried out on a dataset including both ERS and ENVISAT images. For each PS, elevation, LOS velocity and phase jump have been jointly estimated and removed, allowing the identification of the atmospheric phase screen. The PS population so found represents the intersection of ERS and ENVISAT PS populations. The probability of natural targets to behave as PS both in ERS and ENVISAT has been analyzed as a function of their Radar Cross-Section, acquisition geometry and amplitude. Distributed targets with a narrow backscattering lobe pointed towards the first sensor (ERS) are not coherently observed by the second one (ENVISAT), whereas point-wise targets (e.g. natural corner reflectors, dihedrals and small mirrors) will remain coherent in both cases. Experimental results have been carried out on a data set of 69 ERS images and 7 ENVISAT images (ERS-like mode) on Milano over a 20 km side area.
Starting Page	985
Ending Page	988
File Size	980558
Page Count	4
File Format	PDF
ISBN	0780387422
DOI	10.1109/IGARSS.2004.1368574
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2004-09-20
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Radar scattering Phase estimation Light scattering Image analysis Frequency estimation Radar cross section Information geometry Backscatter Mirrors Interferometry
Content Type	Text
Resource Type	Article

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