Title :
Specialized RFI filter for synthetic aperture radiometers and performance with 2D-STAR
Author :
Haken, Michael ; Le Vine, D.M.
Author_Institution :
Sci. Syst. & Applic., Inc., Lanham, MD
Abstract :
A study was conducted to determine if using the non-zero spacing channels (visibilities) in synthetic aperture radiometers could help with the detection of radio frequency interference (RFI) at L-band. The study was conducted using RFI filters developed for the airborne synthetic aperture radiometers ESTAR and 2D-STAR and data collected with 2D-STAR. The ESTAR filter employed a combined threshold/change detector on the total power (zero spacing in the synthetic aperture radiometers). The new approach taken for the 2D-STAR filter employs a threshold on the maximum of all non-zero spacing visibilities in a sample. The filter using all visibilities demonstrated a significant performance advantage, with lower incidence of both missed detections and false detections than the filter using total power.
Keywords :
geophysical signal processing; geophysical techniques; interference filters; radiofrequency filters; radiofrequency interference; radiometers; 2D-STAR; ESTAR; Electronically Scanned Thinned Array Radiometer; L band RFI detection; RFI filter performance; SAR nonzero spacing channels; airborne synthetic aperture radiometers; radiofrequency interference; Contamination; Detectors; Instruments; L-band; Power filters; Radiofrequency interference; Radiometers; Region 1; Region 3; Sea measurements; 2D-STAR; ESTAR; RFI; synthetic aperture radiometer;
Conference_Titel :
Microwave Radiometry and Remote Sensing of the Environment, 2008. MICRORAD 2008
Conference_Location :
Firenze
Print_ISBN :
978-1-4244-1986-9
Electronic_ISBN :
978-1-4244-1987-6
DOI :
10.1109/MICRAD.2008.4579477
