Towards a better excitation of the surface wave: Electromagnetic field on the sea surface

2009 ◽  
Author(s):  
Luca Petrillo ◽  
Muriel Darces ◽  
Florent Jangal ◽  
Jean-Louis Montmagnon ◽  
Marc Helier
Keyword(s):  
Electromagnetic Field ◽  
Surface Wave ◽  
Sea Surface

An investigation on sea surface wave spectra and approximate scattering theories

2014 ◽  
Author(s):  
F. Fois ◽  
P. Hoogeboom ◽  
F. Le Chevalier ◽  
A. Stoffelen
Keyword(s):  
Surface Wave ◽  
Sea Surface ◽  
Wave Spectra ◽  
Sea Surface Wave

Coastal sea-surface wave measurements using software-based GPS reflectometers in Lanyu, Taiwan

GPS Solutions ◽  
2021 ◽  
Vol 25 (4) ◽  
Author(s):  
Lung-Chih Tsai ◽  
Shin-Yi Su ◽  
Hwa Chien ◽  
Chao-Han Liu ◽  
Harald Schuh ◽  
...  
Keyword(s):  
Surface Wave ◽  
Sea Surface ◽  
Wave Measurements ◽  
Coastal Sea ◽  
Sea Surface Wave

scholarly journals Estimation of sea surface wave spectra using acoustic tomography

1987 ◽  
Author(s):  
James H. Miller
Keyword(s):  
Surface Wave ◽  
Sea Surface ◽  
Acoustic Tomography ◽  
Wave Spectra ◽  
Sea Surface Wave

scholarly journals DOPPLER SPECTRUM MATHEMATICAL MODEL OF SIGNAL SCATTERING FROM SEA SURFACE AT LOW GRAZING ANGLES

2019 ◽  
Vol 22 (3) ◽  
pp. 63-73
Author(s):  
Mikhail A. Borodin ◽  
Vyacheslav N. Mikhaylov ◽  
Polina A. Filippova
Keyword(s):  
Mathematical Model ◽  
Electromagnetic Field ◽  
Surface Condition ◽  
Scattering Problem ◽  
Microwave Frequency ◽  
Ecological Monitoring ◽  
Sea Surface ◽  
Doppler Spectrum ◽  
Random Component ◽  
Grazing Angles

Introduction. Doppler spectra of signals which are scattered from sea surface and received by radar is used in oceanology and ecological monitoring applications. Existing models of Doppler spectra have the limitation of application because they are based on empirical data in changing conditions. Variability of the observation conditions critically influence on microwaves scattering by sea surface at low grazing angles which is typical for marine radiolocations. Objective. The goal of investigation proposed in this article is to develop the mathematical model of Doppler spectra at low grazing angles for microwave frequency range. Materials and methods. The two-dimensional problem of the scattering of an electromagnetic field on a cylindrical deterministic surface is considered. For generating of sea surface realizations is used linear model with spatial sea spectrum Elfohaily. The solution of the scattering problem is obtained for the case of vertical polarization of the incident electromagnetic field by the method of an integral equation with the control of the error of the solution. The mathematical modeling of the Doppler Spectrum of signal scattered by sea surface is produced by method of statistical trial. The case where the direction of the observation of the sea surface by radar is perpendicular to the direction of the wind is considered. The electromagnetic filed scattered in the direction of the radar receiver as a function of time is calculated for each generated sea surface realizations. Further, the set of variables of the implementation of scattered field is calculated for implementation of the Doppler spectrum. Results. The set of implementations of the Doppler spectrum provided its mathematical model with consist of deterministic and random component. The approximation of each aforesaid component is suggested and mathematical expressions for value component calculation are presented. The analyze of modeling result is produced. Conclusion. The developed mathematical model is offered to use for the design of algorithm sea surface condition estimation and pollutant detection using the signal which received by radar.

Further work on the relationship between the coherent‐to‐incoherent ratio (CTIR) and the sea surface wave height for one‐way propagation in a shallow ocean channel

2006 ◽  
Vol 119 (5) ◽  
pp. 3311-3311
Author(s):  
R. Lee Culver ◽  
David L. Bradley ◽  
Philippe Roux ◽  
William A. Kuperman ◽  
Stevenson Mark
Keyword(s):  
Surface Wave ◽  
Wave Height ◽  
Sea Surface ◽  
Sea Surface Wave ◽  
The Relationship

Amplification of nonlinear surface waves in an inhomogeneous transition layer

1991 ◽  
Vol 46 (3) ◽  
pp. 459-462 ◽  
Author(s):  
G. Brodin ◽  
O. M. Gradov
Keyword(s):  
Electromagnetic Field ◽  
Surface Wave ◽  
Surface Waves ◽  
Transition Layer ◽  
Variable Depth ◽  
Nonlinear Surface Waves ◽  
Nonlinear Surface

A plasma with a boundary transition layer of variable depth in the presence of a powerful electromagnetic field is considered. It is shown that a displacement of the boundary will grow, and will propagate as a nonlinear surface wave in the direction in which the depth of the transition layer decreases.

scholarly journals Study on the Detectability of the Sky-Surface Wave Hybrid Radar

2014 ◽  
Vol 2014 ◽  
pp. 1-10 ◽  
Author(s):  
Hou Chengyu ◽  
Ke Guo ◽  
Shi Tiange ◽  
Wang Yuxin
Keyword(s):  
Electromagnetic Wave ◽  
Surface Wave ◽  
High Frequency ◽  
Propagation Loss ◽  
Sea Surface ◽  
Bistatic Radar ◽  
High Frequency Band ◽  
Reflection Point ◽  
Ionospheric Height ◽  
Radar Equation

Working in the HF (high-frequency) band and the transmitter and receiver locating separately, the sky-surface wave hybrid radar both has the capabilities of the OTHR (over-the-horizon radar) and the advantage of the bistatic radar. As the electromagnetic wave will be disturbed by the ionosphere, interfered by the sea clutter and attenuated by the sea surface, the detectability of this radar system is more complex. So, in this paper, we will discuss the problem detailedly. First of all, the radar equation is deduced based on the propagation of the electromagnetic wave. Then, how to calculate the effect of the ionosphere and the propagation loss is discussed. And an example based on the radar equation is given. At last, the ambiguity function is used to analyze the range and velocity resolution. From the result, we find that the resolution has relation with the location of the target and the height of reflection point of the ionosphere. But compared with the location, the effect of the ionospheric height can be ignored.

Surface Wave–Turbulence Interactions. Scaling ϵ(z) near the Sea Surface

1995 ◽  
Vol 25 (9) ◽  
pp. 2025-2045 ◽  
Author(s):  
A. Anis ◽  
J. N. Moum
Keyword(s):  
Surface Wave ◽  
Sea Surface ◽  
Wave Turbulence
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