Journal article
Surveys and Analysis of RFI in Preparation for SMOS: Results from Airborne Campaigns and First Impressions from Satellite Data
Several soil moisture and sea salinity campaigns, including airborne L-band radiometer measurements, have been carried out in preparation for the European Space Agency Soil Moisture and Ocean Salinity (SMOS) mission. The radiometer used in this context is fully polarimetric and is capable of detecting radio frequency interference (RFI) using the kurtosis method.
Analyses have shown that the kurtosis method generally detects RFI in an efficient manner, particularly concerning pulsed, low duty cycle signals, but it has some shortcomings when it comes to more continuous wave signal types. Hence, other detection methods have been investigated as well. In particular, inspection of the third and fourth Stokes parameters shows promising results—possibly as a complement to the kurtosis method.
The kurtosis method, however, cannot be used with SMOS data. Since SMOS is fully polarimetric, the third and fourth Stokes parameter method is an option, and a first assessment using a fully polarimetric SMOS data set looks promising. Finally, a variable incidence angle signature algorithm is introduced, and the possibility of using this as an RFI indicator is discussed.
Language: | English |
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Publisher: | IEEE |
Year: | 2011 |
Pages: | 4821-4831 |
ISSN: | 15580644 and 01962892 |
Types: | Journal article |
DOI: | 10.1109/TGRS.2011.2172796 |
ORCIDs: | Balling, Jan E. , Kristensen, Steen Savstrup , Søbjærg, Sten Schmidl and Skou, Niels |
Antennas European Space Agency Kurtosis L-band Microwave radiometry Ocean salinity RFI analysis RFI survey Radar Soil Moisture and Ocean Salinity (SMOS) Soil moisture Stokes parameters airborne L-band radiometer measurement continuous wave signal data analysis fourth Stokes parameter fully polarimetric SMOS data geophysical techniques kurtosis method microwave radar polarimetry radio frequency interference (RFI) radiofrequency interference radiofrequency interference detection radiometer radiometry satellite data analysis soil soil moisture and ocean salinity mission surveying third Stokes parameter variable incidence angle signature algorithm