Title :
VHF/UHF bistatic and passive SAR ground imaging
Author :
Ulander, Lars M. H. ; Frolind, Per-Olov ; Gustavsson, Anders ; Ragnarsson, Rolf ; Stenstrom, Gunnar
Author_Institution :
Dept. of Radar Syst., Swedish Defence Res. Agency (FOI), Linkoping, Sweden
Abstract :
Bistatic and passive radar are emerging technologies for covert ground surveillance based on cooperative or non-cooperative transmitters, respectively. The latter uses transmitters of opportunity, e.g. terrestrial digital video broadcasting (DVB-T). In the paper, we show results from two unique experiments conducted using airborne systems operating in the VHF and UHF bands. The first experiment investigates UHF-band passive synthetic aperture radar (SAR) in receive-only mode. DVB-T signals transmitted from a 300-m tall mast are used and SAR images are formed at ranges up to 15 km. The second experiment investigates VHF-band bistatic SAR with a transmitting airborne radar and a receive-only system on a small helicopter. Results show significantly higher signal-to-clutter ratio for man-made objects in forested areas at bistatic elevation angles of 20°.
Keywords :
airborne radar; digital video broadcasting; ground penetrating radar; passive radar; radar clutter; radar imaging; radar receivers; radar transmitters; search radar; synthetic aperture radar; DVB-T signal transmission; VHF-UHF bistatic SAR ground imaging; airborne radar transmission; cooperative transmitter; distance 300 m; ground surveillance; helicopter; noncooperative transmitter; passive SAR ground imaging; signal-to-clutter ratio; synthetic aperture radar; terrestrial digital video broadcasting; Digital video broadcasting; Geometry; Radar imaging; Receivers; Spaceborne radar; Synthetic aperture radar; DVB-T; SAR; UHF-band; VHF-band; backprojection; bistatic; passive; surveillance;
Conference_Titel :
Radar Conference (RadarCon), 2015 IEEE
Conference_Location :
Arlington, VA
Print_ISBN :
978-1-4799-8231-8
DOI :
10.1109/RADAR.2015.7131080