Hydrographic laser fluorosensing: Status and perspectives
1997; Elsevier BV; Linguagem: Inglês
10.1016/s0422-9894(97)80032-3
ISSN2468-144X
AutoresR. Reuter, R. Willkomm, Oliver Zielinski, W. Milchers,
Tópico(s)Atmospheric and Environmental Gas Dynamics
ResumoIn 1991 the German Ministry of Transport put a Dornier DO 228-212 aircraft into operation, for maritime surveillance of the German territorial waters in the North Sea and the Baltic Sea. The aircraft is equipped with Side-Looking Airborne Radar and a UV/IR scanner for the detection of oil spills. For a more detailed analysis of spills, two new instruments, a Microwave Radiometer and a Laser Fluorosensor, were integrated in 1993. An overview of the Laser Fluorosensor specifications is presented. It is the first instrument of its kind that meets operational requirements for long-term use on board an aircraft. By using a conical scanner, it allows two-dimensional mapping of the sea surface in the nadir range, with 150 m swath width from an altitude of 300 m. Maps of oil film thickness and substance classes are derived from these measurements as part of the pollution control operation. For hydrographic applications the sensor is used to measure the concentration of gelbstoff and algae by their fluorescence, and the attenuation by the water Raman signal. Kriging interpolation between flight tracks is used to generate maps of these parameters. Based on experience with the airborne instrument, the feasibility of fluorescence measurements from space using platforms at altitudes of up to 800 km is studied. A cloudless, horizontally stratified atmosphere, including aerosols and ozone, is taken into consideration. A simulation based on Fermat's principle is used to describe the radiative transfer. The Results are presented in this paper.
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