Identification of the Location Phase Screen of ERS-ENVISAT Permanent Scatterers

Details Identification of the Location Phase Screen of ERS-ENVISAT Permanent Scatterers Identification of the Location Phase Screen of ERS-ENVISAT Permanent Scatterers

Jun 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004esasp.550e..28a&link_type=abstract

Proceedings of the FRINGE 2003 Workshop (ESA SP-550). 1-5 December 2003, ESA/ESRIN, Frascati, Italy. Editor: H. Lacoste. Publish

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Scientific paper

The phase time series of a point-wise Permanent Scatterer shows an additional phase shift passing from ERS to ENVISAT. This shift depends both on the existing 30MHz frequency shift between ERS and ENVISAT and on the location of the PS within the slant range resolution cell. The phase shift changes from one PS to another, but it is constant for all the ENVISAT images and is called "location phase screen" . In this presentation we show the experimental evidence of its existence. A data set of 90 ERS images and 7 ENVISAT images (ERS-like mode) on Milano has been used. Moreover, the location phase screen can be exploited to combine coherently ERS/ENVISAT SAR images and to identify the precise location of the Permanent Scatterers.

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