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Observations and Mitigation of RFI in ALOS PALSAR SAR Data; Implications for the Desdyni MissionInitial examination of ALOS PALSAR synthetic aperture radar (SAR) data has indicated significant radio frequency interference (RFI) in several geographic locations around the world. RFI causes significant reduction in image contrast, introduces periodic and quasi-periodic image artifacts, and introduces significant phase noise in repeat pass interferometric data reduction. The US National Research Council Decadal Survey of Earth Science has recommended DESDynI, a Deformation, Ecosystems, and Dynamics of Ice satellite mission comprising an L-band polarimetric radar configured for repeat pass interferometry. There is considerable interest internationally in other future L-band and lower frequency systems as well. Therefore the issues of prevalence and possibilities of mitigation of RFI in these crowded frequency bands is of considerable interest. RFI is observed in ALOS PALSAR in California, USA, and in southern Egypt in data examined to date. Application of several techniques for removing it from the data prior to SAR image formation, ranging from straightforward spectral normalization to time-domain, multi-phase filtering techniques are considered. Considerable experience has been gained from the removal of RFI from P-band acquired by the GeoSAR system. These techniques applied to the PALSAR data are most successful when the bandwidth of any particular spectral component of the RFI is narrow. Performance impacts for SAR imagery and interferograms are considered in the context of DESDynI measurement requirements.
Document ID
20150008601
Document Type
Conference Paper
External Source(s)
Authors
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)
Le, Charles
(Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Date Acquired
May 20, 2015
Publication Date
May 26, 2008
Subject Category
Communications And Radar
Meeting Information
IEEE National Radar Conference(Rome)
Distribution Limits
Public
Copyright
Other
Keywords
InSAR
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