NDLI: Multifrequency Biplanar Interferometric Imaging

Content Provider	IEEE Xplore Digital Library
Author	Cutter, G.R. Demer, D.A.
Copyright Year	2004
Abstract	The resolution of 3-D imaging is greatly improved using a new multifrequency biplanar interferometry (MBI) technique. Using data from a multifrequency-acoustic pulse-echo system, ranges to coherent targets, estimated from propagation delays, and the phase differences between echoes received with four quadrants of a split-aperture array are converted to Cartesian distances, and transformed into Earth coordinates. The collective data set is interpolated to create a surface closely approximating the target's image. The resolution of the resulting image is improved orders of magnitude relative to those created with measures based on echo-intensity or single-frequency uniplanar interferometry. The effectiveness of MBI is demonstrated using data from a multifrequency (18 to 200 kHz) split-aperture echosounder system to produce composite high-resolution (submeter precision) images of the seabed sensed at long ranges (tens to hundreds of meters). MBI can be broadly applied to data from split-aperture remote-sensing systems which use acoustic or electromagnetic waves.
Sponsorship	IEEE Geoscience and Remote Sensing Society
Starting Page	171
Ending Page	175
Page Count	5
File Size	559253
File Format	PDF
ISSN	1545598X
Volume Number	7
Issue Number	1
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2010-01-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Image resolution Interferometry Phased arrays Delay estimation Phase estimation Propagation delay Image converters Earth Remote sensing Acoustic waves multiple frequency Acoustic imaging echosounder interferometry
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering Geotechnical Engineering and Engineering Geology

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4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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