Measurement of Ocean Wave Directional Spectra Using Airborne HF/VHF Synthetic Aperture Radar: A Theoretical Evaluation

Voronovich, Alexander G.; Zavorotny, Valery U.

doi:10.1109/TGRS.2017.2663378

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The NOAA IR serves as an archival repository of NOAA-published products including scientific findings, journal articles, guidelines, recommendations, or other information authored or co-authored by NOAA or funded partners. As a repository, the NOAA IR retains documents in their original published format to ensure public access to scientific information.

i

Measurement of Ocean Wave Directional Spectra Using Airborne HF/VHF Synthetic Aperture Radar: A Theoretical Evaluation

2017
By Voronovich, Alexander G. ; Zavorotny, Valery U.
Source: IEEE Transactions on Geoscience and Remote Sensing ( Volume: 55, Issue: 6, June 2017)

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Details:

Journal Title:

IEEE Transactions on Geoscience and Remote Sensing
Personal Author:

Voronovich, Alexander G. ; Zavorotny, Valery U.

Voronovich, Alexander G. ; Zavorotny, Valery U. Less -
NOAA Program & Office:

OAR (Oceanic and Atmospheric Research) ; PSL (Physical Sciences Laboratory)

OAR (Oceanic and Atmospheric Research) ; PSL (Physical Sciences Laboratory) Less -
Description:

Currently, images obtained with microwave synthetic aperture radars (SARs) are widely used for measuring directionality of ocean waves on a global and continuous scale. However, with all the advantages of the microwave SAR systems, the effectiveness of wave spectrum retrieval from SAR images is still debated. In this paper, we demonstrate how the directional spectrum of relatively long sea waves can be measured using aperture synthesis method in conjunction with relatively low radio frequencies (HF and VHF bands). This approach has advantages over HF ground-based radars used for ocean wave studies in coastal zones. In this paper, we theoretically evaluate this technique for the system mounted on aircraft. A favorable combination of the parameters for both ocean surface waves and HF electromagnetic waves allows an accurate analytical description of scattering from the sea surface based on the first approximation of the small perturbation method. In this case, scattered electromagnetic field becomes a linear functional of sea surface wave elevations. An analysis of the signal processing pertaining to this situation is presented, and a practical example is discussed. The proposed approach can be used even in the case when the radar platform is moving nonsteadily and/or along the curvilinear trajectory.
Keywords:

[+]

HF Radar Remote Sensing Sea Measurments Synthetic Aperture Radar (SAR)
Source:

IEEE Transactions on Geoscience and Remote Sensing ( Volume: 55, Issue: 6, June 2017)
DOI:

https://doi.org/10.1109/TGRS.2017.2663378
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Journal Article
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Submitted
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[+]

urn:sha256:0675f0141899473f798a19f3065b3fbbc76668c6596b1237da3884826189b2b3
Download URL:

https://repository.library.noaa.gov/view/noaa/31124/noaa_31124_DS1.pdf
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[PDF-675.90 KB]