Waves can be used to probe and image an unknown medium. Passive imaging uses ambient noise sources to illuminate the medium. This paper considers passive imaging with moving sensors. The motivation is to generate large synthetic apertures, which should result in enhanced resolution. However Doppler effects and lack of reciprocity significantly affect the imaging process. This paper discusses the consequences in terms of resolution and it shows how to design appropriate imaging functions depending on the sensor trajectory and velocity.
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Figure 2.
Experimental set-up for passive reflector imaging in Section 3. The circles are noise sources (at the surface
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Throughout the paper, symbols of scalar quantities are printed in italic type and symbols of vectors are printed in bold italic type.
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