GNSS-based passive airborne radar: hybrid-aperture sensing and airborne test plans

Randall Silver; Hernan Suarez; Yan Zhang; Yih-Ru Huang; Mansur Tyler

doi:10.1117/12.2050027

29 May 2014 GNSS-based passive airborne radar: hybrid-aperture sensing and airborne test plans

Randall Silver, Hernan Suarez, Yan Zhang, Yih-Ru Huang, Mansur Tyler

Proceedings Volume 9077, Radar Sensor Technology XVIII; 90770H (2014) https://doi.org/10.1117/12.2050027
Event: SPIE Defense + Security, 2014, Baltimore, MD, United States

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).

Citation Download Citation

Randall Silver, Hernan Suarez, Yan Zhang, Yih-Ru Huang, and Mansur Tyler "GNSS-based passive airborne radar: hybrid-aperture sensing and airborne test plans", Proc. SPIE 9077, Radar Sensor Technology XVIII, 90770H (29 May 2014); https://doi.org/10.1117/12.2050027

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