Synthetic Aperture Approach to Multi-Beam Scanning Acoustical Imaging

1975 ◽  
pp. 507-523 ◽  
Author(s):  
Kazuhiko Nitadori
Keyword(s):  
Synthetic Aperture ◽  
Beam Scanning ◽  
Acoustical Imaging

scholarly journals A Wide-Beam Scanning Mode for Near-Space Passive SARs

2012 ◽  
Vol 2012 ◽  
pp. 1-7 ◽  
Author(s):  
Peng Zhou ◽  
Peng Ren ◽  
Yongshou Dai
Keyword(s):  
Space Vehicle ◽  
Synthetic Aperture ◽  
Time Interval ◽  
Passive Radar ◽  
Beam Scanning ◽  
Wide Beam ◽  
Near Space ◽  
Azimuth Resolution ◽  
Beam Mode

A near-space passive SAR consists of a passive radar receiver placed on a near-space vehicle and another existing radar on a satellite serving as an illuminator. In this paper, we present a wide-beam scanning mode for near-space passive SARs for the purpose of increasing the azimuth scene extension. The receiving distance of a near-space SAR is much shorter than that of a satellite-based SAR, and the synthetic aperture time for a near-space passive SAR is not longer than the time interval during which a target transverses the azimuth beam of a transmitter. We design our novel mode by spreading the azimuth beam of a receiver to match the azimuth footprint of the transmitter. We also synchronize the azimuth beam of the receiver with that of the satellite within seconds during the beam scanning to further increase the scene extension. Furthermore, we formulate the azimuth scene extension and the footprint overlapping time for near-space passive SARs in terms of the possible locations of the involved satellites and receivers. Experimental simulations demonstrate the effectiveness of our proposed mode, especially revealing that the wide-beam scanning mode improves the azimuth scene extension and footprint overlapping time over the wide-beam mode, without decreasing azimuth resolution.

Digital Signal Processing and Atomic Functions in Synthetic Aperture Radar

2007 ◽  
Vol 66 (16) ◽  
pp. 1441-1452 ◽  
Author(s):  
Victor Filippovich Kravchenko ◽  
V. K. Volosyuk ◽  
V. V. Pavlikov
Keyword(s):  
Signal Processing ◽  
Digital Signal Processing ◽  
Synthetic Aperture Radar ◽  
Digital Signal ◽  
Synthetic Aperture ◽  
Aperture Radar
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