Simulation Study on the Effect of Wind Direction on SAR Imaging Shallow Water Bathymetry

A simulation model of SAR imaging of shallow water bathymetry has been developed according to SAR imaging mechanism of shallow water bathymetry and based on the software toolkit M4S. According to the simulation results of shallow water bathymetry and based on the analysis of shallow water bathymetry ERS-2 SAR images off the west south of Jilong Island, the relationship between the sea surface wind direction and SAR imaging shallow water bathymetry has been improved. The results showed that, the expression of SAR imaging shallow water bathymetry is mainly affected by the sea surface wind direction. When the wind direction is parallel or adverse to the current component in the direction of shallow water bathymetry, dark streaks or bright streaks appear on SAR images. Under crosswind, the bright and dark streaks are alternant. And the adverse wind direction is better for SAR imaging of shallow water bathymetry.

[1]  C. Calkoen,et al.  The Bathymetry Assessment System: Efficient depth mapping in shallow seas using radar images , 2001 .

[2]  P. Brandt,et al.  On the determination of characteristics of the interior ocean dynamics from radar signatures of internal solitary waves , 1999 .

[3]  范开国,et al.  A Review About SAR Technique for Shallow Water Bathymetry Surveys , 2007 .

[4]  Christopher R. Jackson,et al.  Synthetic aperture radar : marine user's manual , 2004 .

[5]  lt,et al.  A review about SAR technique for shallow water bathymetry surveys , 2007 .

[6]  Ingo Hennings,et al.  Radar imaging of submarine sand waves in tidal channels , 1990 .

[7]  W. Alpers,et al.  An improved composite surface model for the radar backscattering cross section of the ocean surface 1. Theory of the model and optimization/validation by scatterometer data , 1997 .

[8]  W. Huangf,et al.  A Spaceborne SAR Technique for Shallow Water Bathymetry Surveys , 2004 .

[9]  W. Alpers,et al.  An improved composite surface model for the radar backscattering cross section of the ocean surface: 2. Model response to surface roughness variations and the radar imaging of underwater bottom topography , 1997 .

[10]  W. Alpers.  Theory of radar imaging of internal waves , 1985 .

[11]  B. Holt,et al.  SEASAT views oceans and sea ice with synthetic aperture radar , 1982 .

[12]  M. Longuet-Higgins,et al.  Radiation stresses in water waves; a physical discussion, with applications , 1964 .

[13]  C. Calkoen,et al.  Island connected sea bed signatures observed by multi-frequency synthetic aperture radar , 1998 .

[14]  S. V. Kijashko,et al.  Role of surface films in ERS SAR signatures of internal waves on the shelf: 1. Short-period internal waves , 1998 .

[15]  J. Vogelzang,et al.  A comparison of the hydrodynamic modulation in some existing models , 1989 .

[16]  W. Alpers,et al.  A theory of the imaging mechanism of underwater bottom topography by real and synthetic aperture radar , 1984 .