The object of the study is to model the electromagnetic scattering by time-evolving sea surfaces illuminated by high frequency surface wave radars. A common way to simulate this case is to consider the scattering at grazing incidence. Recent studies have focused on so-called exact methods. As such methods are very time and memory consuming, it becomes important to implement techniques to reduce the calculation costs. Another important issue is to better understand the interactions between the electromagnetic waves and moving sea surfaces. We present in this article our simulator main characteristics and a comparison between simulated data and measurements.
L'objectif de cette étude est de modéliser la diffusion électromagnétique par des surfaces océaniques, lorsqu'elles sont éclairées par des radars hautes fréquences à ondes de surface. L'approche communément retenue est d'étudier la diffusion en incidence rasante. Des études récentes s'appuient sur des méthodes dites exactes. Comme de telles méthodes impliquent des temps de calculs et des volumes de données prohibitifs, il devient important d'implémenter des techniques permettant de réduire ces coûts. L'enjeu est également de comprendre les interactions entre l'onde électromagnétique et la surface océanique. Nous présentons dans cet article les principales caractéristiques de notre simulateur et une comparaison avec des mesures.
Mots-clés : ROS, Surface de mer, Onde de surface, Modélisation électromagnétique, Diffusion électromagnétique
Yaël Demarty 1; Laetitia Thirion-Lefevre 2; Vincent Gobin 3
@article{CRPHYS_2010__11_1_87_0,
author = {Ya\"el Demarty and Laetitia Thirion-Lefevre and Vincent Gobin},
title = {Modelling of the electromagnetic scattering by sea surfaces at grazing incidence. {Application} to {HF} surface wave radars},
journal = {Comptes Rendus. Physique},
pages = {87--95},
publisher = {Elsevier},
volume = {11},
number = {1},
year = {2010},
doi = {10.1016/j.crhy.2010.01.003},
language = {en},
}
TY - JOUR AU - Yaël Demarty AU - Laetitia Thirion-Lefevre AU - Vincent Gobin TI - Modelling of the electromagnetic scattering by sea surfaces at grazing incidence. Application to HF surface wave radars JO - Comptes Rendus. Physique PY - 2010 SP - 87 EP - 95 VL - 11 IS - 1 PB - Elsevier DO - 10.1016/j.crhy.2010.01.003 LA - en ID - CRPHYS_2010__11_1_87_0 ER -
%0 Journal Article %A Yaël Demarty %A Laetitia Thirion-Lefevre %A Vincent Gobin %T Modelling of the electromagnetic scattering by sea surfaces at grazing incidence. Application to HF surface wave radars %J Comptes Rendus. Physique %D 2010 %P 87-95 %V 11 %N 1 %I Elsevier %R 10.1016/j.crhy.2010.01.003 %G en %F CRPHYS_2010__11_1_87_0
Yaël Demarty; Laetitia Thirion-Lefevre; Vincent Gobin. Modelling of the electromagnetic scattering by sea surfaces at grazing incidence. Application to HF surface wave radars. Comptes Rendus. Physique, Propagation and remote sensing, Volume 11 (2010) no. 1, pp. 87-95. doi : 10.1016/j.crhy.2010.01.003. https://comptes-rendus.academie-sciences.fr/physique/articles/10.1016/j.crhy.2010.01.003/
[1] Doppler spectrum of sea echo at 13.56 mc/s, Nature, Volume 175 (1955), pp. 681-682
[2] First-order theory and analysis of MF/HF/VHF scatter from the sea, IEEE Trans. Ant. Prop., Volume 20 (1972), pp. 2-10
[3] Radio measurements of oceanic winds at long ranges: An evaluation, Radio Sci., Volume 10 (1975) no. 10, pp. 853-857
[4] et al. HF radar wave and wind measurement over the Eastern China Sea, IEEE Trans. Geosc. Rem. Sens., Volume 40 (2002), pp. 1950-1955
[5] Directional sea spectrum determination using HF Doppler radar techniques, Radio Sci., Volume 12 (1977), pp. 415-424
[6] Measuring rms wave height and the scalar ocean wave spectrum with HF skywave radar, J. Geophys. Res., Volume 85 (1980), pp. 2759-2771
[7] An evaluation of wave parameters measured using a single HF radar system, Can. J. Rem. Sens., Volume 28 (2002) no. 2, pp. 205-218
[8] An empirical method to derive ocean waves from second-order Bragg scattering: Prospects and limitations, IEEE J. Ocean Engrg., Volume 31 (2006) no. 4, pp. 804-811
[9] Kingsley, HF radars: physical limitations and recent developments, Coastal Engineering, Volume 37 (1999), pp. 201-218
[10] Small-slope approximation in wave scattering by rough surfaces, Sov. Phys. JETP, Volume 62 (1985), pp. 65-70
[11] A physically-based two scale electromagnetic model for backscatter from ocean-like surfaces, IGARSS, Volume 1 (1996), pp. 600-602
[12] Two families of non-local scattering models and the weighted curvature approximation, Waves Random Media, Volume 14 (2004) no. 4, pp. 563-580
[13] Theoretical study of the Kirchhoff integral from two-dimensional randomly rough surface with shadowing effect: application on the backscattering coefficient for a perfectly conducting surface, Waves Random Media, Volume 11 (2001) no. 2, pp. 91-118
[14] Bistatic scattering coefficient from one- and two-dimensional random surfaces using the stationary phase and scalar approximation with shadowing effect – comparisons with experiments and application to the sea surface, Waves Random Media, Volume 11 (2001) no. 2, pp. 119-147
[15] A critical survey of approximate scattering wave theories from random rough surfaces, Waves Random Media, Volume 14 (2004) no. 4, p. R1-R40
[16] et al. Numerical simulation of backscatter from linear and nonlinear ocean surface realizations, Radio Sci., Volume 26 (1991), pp. 51-71
[17] et al. Backscattering enhancement of electromagnetic waves from two-dimensional perfectly conducting random rough surfaces: A comparison of Monte Carlo simulations with experimental data, IEEE Trans. Ant. Prop., Volume 44 (1996), pp. 748-756
[18] et al. A method of moments model for VHF propagation, IEEE Trans. Ant. Prop., Volume 45 (1997), pp. 115-125
[19] On the discretization of the integral equation describing scattering by rough conducting surfaces, IEEE Trans. Ant. Prop., Volume 46 (1998), pp. 150-161
[20] Numerical simulation of scattering from time-varying, randomly rough surfaces, IEEE Trans. Geosc. Rem. Sens., Volume 38 (2000), pp. 1616-1625
[21] Modelization of the scattering of electromagnetic waves from the ocean surface, PIER, Volume X (2003) no. 4, pp. 102-128
[22] et al. Measurements of wind-wave growth and swell decay during the joint north sea wave project (JONSWAP), Deutsche Hydrographische Z., Volume A (1973) no. 12
[23] Demarty, Modélisation cohérente de la diffusion électromagnétique par des surfaces de mer tridimensionnelles en incidence rasante. Application aux radars HF à ondes de surface, Thèse de Doctorat, Université Pierre et Marie Curie, 2008
[24] Full digital high frequency surface wave radar: French trials in the Biscay Bay, IEEE RADAR (2008)
[25] National Oceanic and Atmospheric Administration (NOAA) http://www.ndbc.noaa.gov/station_page.php?station=62001 (National Data Buoy Center)
Cited by Sources:
Comments - Policy