Hyperspectral imaging and full-waveform topo-bathymetric airborne LiDAR platform call for collaboration in multilayered target detection and mapping

The hyperspectral imaging (HSI) allows the detection of absorption features revealing the presence of fluids, minerals, pigments and other organic substances in a single pixel. Its synchronization with topo-bathymetric light detection and ranging (LiDAR) recording the full waveform (FWF) of 1064nm and 532nm laser beam gives for each pixel its light path incident angle and interaction length with surface roughness, vegetation height or water depth with refraction correction at air water interfaces. A few examples of shoreline monitoring and sandbank tracking are presented to highlight the interest of LiDAR-FWF-HSI synchronization to map tree and low vegetation, ground and soil, water surface and sea bottom. Many mixing studies are currently used but all ignore the length of light interaction between their imbricated components. Sedimentary balances are also often biased by vegetation covers. Our platform, shared between Nantes and Rennes, would like to facilitate the access to such FWF-HSI data to sustain the development of new mixing models of interest for environmental and geological studies.