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Proceedings Paper

GNSS-based passive airborne radar: hybrid-aperture sensing and airborne test plans
Author(s): Randall Silver; Hernan Suarez; Yan Zhang; Yih-Ru Huang; Mansur Tyler
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Paper Abstract

The past two decades has witnessed a renaissance in passive radar research. One of the areas of research in passive radar that has received recent attention is the use of reflected GNSS signals as the signal-of-opportunity for bistatic synthetic aperture radar (BSAR), known as space-surface BSAR (SS-BSAR) [1-7]. SS-BSAR is unique because it uses GNSS signals, which, in the case of the US owned and operated Global Positioning System (GPS), provide almost constant coverage to almost the entire earth [8-10]. Furthermore, the GPS satellites transmit left and right-hand circularly polarized signals combined during transmission to form a right-hand circularly polarized (RHCP) signal; the benefits being, when compared to horizontal or vertical polarized waveforms, is the signal reflection re-radiates in the opposite, or left-hand circularly polarized (LHCP), polarization with signal loss ranging from 15 to 20 dB [5, 10]. One major drawback to using GPS as the signal-of-opportunity is that the received signal level is extremely low, and lower when reflected (see Table 1).

Paper Details

Date Published: 29 May 2014
PDF: 15 pages
Proc. SPIE 9077, Radar Sensor Technology XVIII, 90770H (29 May 2014); doi: 10.1117/12.2050027
Show Author Affiliations
Randall Silver, Univ. of Oklahoma (United States)
Hernan Suarez, Univ. of Oklahoma (United States)
Yan Zhang, Univ. of Oklahoma (United States)
Yih-Ru Huang, Univ. of Oklahoma (United States)
Mansur Tyler, Univ. of Oklahoma (United States)

Published in SPIE Proceedings Vol. 9077:
Radar Sensor Technology XVIII
Kenneth I. Ranney; Armin Doerry, Editor(s)

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