RANGE RESOLVED LIDAR FLUOROSENSOR FOR MARINE INVESTIGATION
2. ENEA guest student Shipborne and airborne lidar fluorosensors are currently in use to monitor wide marine surfaces. Important seawater quality parameters can be remotely monitored, such as phytoplankton and CDOM concentration, turbidity and pollutants. Since marine organic substances and phytopla...
| Main Authors: | , , , , , |
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| Format: | Text |
| Language: | English |
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| Online Access: | http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.519.6621 http://las.physik.uni-oldenburg.de/eProceedings/vol01_1/01_1_barbini4.pdf |
| Summary: | 2. ENEA guest student Shipborne and airborne lidar fluorosensors are currently in use to monitor wide marine surfaces. Important seawater quality parameters can be remotely monitored, such as phytoplankton and CDOM concentration, turbidity and pollutants. Since marine organic substances and phytoplankton are stratified in layers floating at different water depths, it is of primary importance for exhaustive ecosystem studies to measure their vertical concentration profiles. A new lidar fluorosensor has been designed and developed in the frame of the Italian Research Program for Antarctica, to re-motely detect these seawater features in a range resolved mode. The system has been mounted in the hold of the research vessel Italica and connected to the lower sea water level through a large size tube down to the ship's keel. Subsurface waters were investigated starting from about 7 m depth. Full operation was achieved during the XV Italian Antarctic Expedition: range resolved LIF signals were collected on four spectral channels, corresponding to laser back-scattering, water Raman, CDOM and Chl-a emission, respectively. Total extinction and information on concentrations depth profiles could be extracted from the data. Different tests were performed on the hardware to gain information about the transceiver and electronic modules. Results of the system performances in terms of range and sensitivity for each spectral channel will be utilised in designing a new compact lidar fluorosensor package to be mounted on an underwater Remotely Operated Vehicle. |
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