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Analysis of RFI Identification and Mitigation in CAROLS Radiometer Data Using a Hardware Spectrum Analyser
LATMOS, Route de Troux, 78280 Guyancourt, France
CESBIO (UPS/CNRS/IRD/CNES), 18 Avenue Edouard Belin, bpi 2801, 31401 Toulouse Cedex 9, France
* Author to whom correspondence should be addressed.
Received: 30 January 2011; in revised form: 26 February 2011 / Accepted: 28 February 2011 / Published: 7 March 2011
Abstract: A method to identify and mitigate radio frequency interference (RFI) in microwave radiometry based on the use of a spectrum analyzer has been developed. This method has been tested with CAROLS L-band airborne radiometer data that are strongly corrupted by RFI. RFI is a major limiting factor in passive microwave remote sensing interpretation. Although the 1.400–1.427 GHz bandwidth is protected, RFI sources close to these frequencies are still capable of corrupting radiometric measurements. In order to reduce the detrimental effects of RFI on brightness temperature measurements, a new spectrum analyzer has been added to the CAROLS radiometer system. A post processing algorithm is proposed, based on selective filters within the useful bandwidth divided into sub-bands. Two discriminant analyses based on the computation of kurtosis and Euclidian distances have been compared evaluated and validated in order to accurately separate the RF interference from natural signals.
Keywords: RFI; CAROLS; L-band; radiometry
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Fanise, P.; Pardé, M.; Zribi, M.; Dechambre, M.; Caudoux, C. Analysis of RFI Identification and Mitigation in CAROLS Radiometer Data Using a Hardware Spectrum Analyser. Sensors 2011, 11, 3037-3050.
Fanise P, Pardé M, Zribi M, Dechambre M, Caudoux C. Analysis of RFI Identification and Mitigation in CAROLS Radiometer Data Using a Hardware Spectrum Analyser. Sensors. 2011; 11(3):3037-3050.
Fanise, Pascal; Pardé, Mickaël; Zribi, Mehrez; Dechambre, Monique; Caudoux, Christophe. 2011. "Analysis of RFI Identification and Mitigation in CAROLS Radiometer Data Using a Hardware Spectrum Analyser." Sensors 11, no. 3: 3037-3050.