Wensink, G.J.; Hesselmans, G.H.F.M.; Calkoen, C.J. (1999). The bathymetry assessment system, in: Ollier, G. et al. (Ed.) Third European Marine Science and Technology Conference Lisbon, 23-27 May 1998: session report seafloor characterisation/mapping including swath bathymetry, side-scan sonar and geophysical surveys. pp. 49-54
In: Ollier, G.; Cochonat, P.; Victor, L.M. (Ed.) (1999). Third European Marine Science and Technology Conference Lisbon, 23-27 May 1998: session report seafloor characterisation/mapping including swath bathymetry, side-scan sonar and geophysical surveys. Office for Official Publications of the European Communities: Luxembourg. ISBN 92-828-5060-9. 134 pp., meer
In the presence of current and wind, submerged topographic features of the seabed produce contrasts in radar images. These contrasts can be quantitatively understood and modeled, based on hydrodynamics and electromagnetic scattering theory. A suite of models has been developed based on the generally accepted imaging mechanism, which consists of three steps: (1) surface current modulation by the bathymetry, (2) modulation of the (small) wave spectrum by wave-current interaction, and (3) radar backscattering by the sea surface. In order to invert this depth-radar backscatter relation, a data assimilation scheme has been developed. These numerical models have implemented, leading to the Bathymetry Assessment System (BAS). An example of an application in the Dutch coastal waters is presented.
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