RESEARCH ON OPTICAL REMOTE SENSING OF IMPROVED SHALLOW WATER BATHYMETRY WITHOUT MEASURED WATER DEPTH

Passive optical shallow water bathymetry algorithms often need some actual measured water depths to participate in model calculation. In recent years, some new bathymetry methods without using the actual measured depth have been developed, such as the dual band log linear model. However, many theoretical assumptions are used in the calculation of the diffuse attenuation coefficient of green band in the model, and the result may be inaccurate. In order to obtain more accurate diffuse attenuation coefficient, Hydrolight is used for water optics simulation, and 30 groups of simulation values of different water components and water depths are obtained. The experimental results of bathymetry model with simulated parameters show that the inversion accuracy of Dongdao Island and Oahu Island is satisfactory, the mean absolute error is less than 2 m, and the mean relative error is 20.9% and 15.9% respectively