EXTRACTING BATHYMETRY FROM MULTI-TEMPORAL SPOT IMAGES

摘要

In this paper, we investigate the potential of multiple images acquired by the opticalear infrared sensor of the SPOT (Satellite Pour l'Observation de la Terre) satellites for the retrieval of water depth (bathymetry) information. We make use of known methods of depth retrieval from optical data that are based on the attenuation of sunlight by the water column, but in addition we use the known water level differences in multiple images acquired at different stages of the tidal cycle. The known water level difference is used to get an estimate of the attenuation coefficient of the water without having ground truth. The results are reasonable for shallow water.