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8 June 2011Airborne laser vibrometer for seismic subsurface inspection
We describe our ongoing research into a laser-seismic system for detecting and identifying buried objects from
airborne platforms. We discuss generation of acoustic or high-power microwave sources in the aircraft, coupling of
acoustic waves to seismic waves at the ground, frequency and bandwidth for resolution and propagation of seismic
waves. Several alternative methods of generating the seismic wave include use of existing earth seismic noise,
drop seismic noise makers, high power pulse acoustic source, microwave sources that causes an arc to generate
acoustic noise at the earth's surface. A laser scans the region in a vibrometer interferometer configuration to
measure the amplitude of the oscillations in the seismic wave at spots along the surface of the ground. The
detection and identification of buried objects is determined from the seismic measurements.
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Alastair D. McAulay, "Airborne laser vibrometer for seismic subsurface inspection," Proc. SPIE 8037, Laser Radar Technology and Applications XVI, 80370Y (8 June 2011); https://doi.org/10.1117/12.884352