title: Analysis of RFI identification and mitigation in CAROLS radiometer data using a hardware spectrum analyser.
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.
authors.affiliation: LATMOS, Route de Troux, 78280 Guyancourt, France.
authors.forename: Pascal
authors.initials: P
authors.lastname: Fanise
authors.forename: Mickaël
authors.initials: M
authors.lastname: Pardé
authors.forename: Mehrez
authors.initials: M
authors.lastname: Zribi
authors.forename: Monique
authors.initials: M
authors.lastname: Dechambre
authors.forename: Christophe
authors.initials: C
authors.lastname: Caudoux
mesh_terms: D000465:Algorithms; D001267:Atlantic Ocean; D002138:Calibration; D003201:Computers; D005602:France; D057233:Radio Frequency Identification Device / Q000379:methods*; D011874:Radiometry / Q000295:instrumentation* / Q000379:methods*; D013057:Spectrum Analysis / Q000295:instrumentation*; D013223:Statistics as Topic; D013696:Temperature; D013997:Time Factors