File:Interferometric SAR imaging of ocean surface currents and wavefields (IA interferometrics1094535036).pdf
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Summary[edit]
Interferometric SAR imaging of ocean surface currents and wavefields
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| Author |
Marom, Moshe |
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| Title |
Interferometric SAR imaging of ocean surface currents and wavefields |
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| Publisher |
Monterey, California. Naval Postgraduate School |
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| Description |
The potential of a method to remotely measure near-surface currents and dominant wave spectra using Interferometric Synthetic Aperture Radar INSAR is demonstrated. INSAR consists of a single conventional SAR augmented by an additional receiving antenna. The phase difference between corresponding SAR image scenes observed by the antennas provides an interferogram directly proportional to the ocean surface velocity field. This direct motion detection by INSAR suggests a significant advance compared with conventional SAR where the response to the moving ocean surface is indirectly related to complex modulation of the surface reflectivity by longer waves and currents. An experiment using an airborne INSAR to measure ocean surface currents and wave fields, compared with simultaneous ground truth measurements using Lagrangian drifters and wave array data was conducted in Monterey Bay. INSAR measured mean current magnitude estimates agree to within 10% compared with conventional measurements. The INSAR image wavenumber spectrum is consistent with the in situ directional spectrum and with predicted numerical refraction model outputs. Wavelength of the observed swells is better agreement (correlation better than 0.9) than wave direction. An attempt to estimate the scene coherence time for L-band SAR was made by taking advantage of the almost simultaneously acquired SAR and INSAR images. The obtained mean scene coherence time (100 msec) is consistent with sparse observed estimates in the literature. Subjects: Synthetic aperture radar; Oceanography; Interferometric SAR; Scene coherence time; 2D wavenumber spectra; Surface Currents |
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| Language | English | |
| Publication date | June 1990 | |
| Current location |
IA Collections: navalpostgraduateschoollibrary; fedlink |
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| Accession number |
interferometrics1094535036 |
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| Source | ||
| Permission (Reusing this file) |
This publication is a work of the U.S. Government as defined in Title 17, United States Code, Section 101. As such, it is in the public domain, and under the provisions of Title 17, United States Code, Section 105, may not be copyrighted. | |
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| This file has been identified as being free of known restrictions under copyright law, including all related and neighboring rights. | ||
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
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| current | 06:33, 9 July 2020 |  | 1,275 × 1,650, 219 pages (7.94 MB) | Fæ (talk | contribs) | FEDLINK - United States Federal Collection interferometrics1094535036 (User talk:Fæ/IA books#Fork8) (batch 1990-1992 #5098) |
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