NDLI: Two-dimensional simulations of SAR imagery of ocean waves

Content Provider	IEEE Xplore Digital Library
Author	Zurk, L.M. Plant, W.J.
Copyright Year	1994
Description	Author affiliation: Appl. Phys. Lab., Washington Univ., Seattle, WA, USA (Zurk, L.M.; Plant, W.J.)
Abstract	The authors have carried out two-dimensional simulations of synthetic aperture radar (SAR) imagery of ocean waves and compared these simulations with actual images obtained during the SAXON-FPN experiment. They have simulated the imagery using measured imaging parameters and three variations of SAR imaging theory which make progressively more simplifying assumptions: time-dependent, velocity-bunching, and quasi-linear. They find that under most standard SAR imaging conditions, time-dependent and velocity-bunching models are indistinguishable. However, for long integration times the velocity bunching simulations show a smearing of the spectral peak. This effect is intensified for large R/V ratios (where R is the average range distance and V is the platform velocity). The quasi-linear formulation assumes linear imaging and fails for large R/V ratios to reproduce the low frequency behavior observed in actual imagery, due to the non-linear effects. The advantage of the more simple formulations is, of course, shorter computing time. They find that time-dependent modelling takes about 100 times longer than velocity-bunching and closer to 300 times longer than quasi-linear modelling to produce results.
Starting Page	2029
Ending Page	2031
File Size	268476
Page Count	3
File Format	PDF
ISBN	0780314972
DOI	10.1109/IGARSS.1994.399644
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1994-08-08
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Ocean waves Equations Poles and towers Hydrodynamics Acceleration Directive antennas Antennas and propagation Degradation Image resolution Linear approximation
Content Type	Text
Resource Type	Article

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1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
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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