Suppression of Ground Radar Interference in JERS-1 SAR Data

Hiroshi KIMURA  Takashi NAKAMURA  Konstantinos P. PAPATHANASSIOU  

IEICE TRANSACTIONS on Communications   Vol.E87-B   No.12   pp.3759-3765
Publication Date: 2004/12/01
Online ISSN: 
Print ISSN: 0916-8516
Type of Manuscript: PAPER
Category: Sensing
Synthetic Aperture Radar (SAR),  ground radar,  interference,  notch filter,  JERS-1,  

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JERS-1 L-band SAR data can be, especially over urban areas affected by ground radar interferences. For most of the applications of the data the interferences should be suppressed. Notch filtering during image correlation process is one of the straightforward ways to do this. However, lower the threshold is, more signals from earth surface is eliminated. In this paper, a probability density function (PDF's) model of the ground radar interference signal is worked out from experimental data, and used for the suppression of interferences and the preservation of backscattered signals. The validity of the model is confirmed against real SAR data, and a general filter threshold--applicable to all JERS-1 SAR data--without any conditions is proposed.