Use of airborne LIDAR for research in fisheries oceanography

摘要

At present, the requirements on truth and accuracy of providing initial data in the interests of fisheries oceanography is increased. Also it is very important to get complex data from large sea areas in a short time. One way of that, is to use airborne remote sensing data from different type remote sensing equipments, and next is to use new type equipments. Therefore during last several years PINRO has used new remote sensing methods for providing fisheries oceanography information, which are based on using LIDAR systems - LIght Detection And Ranging. Ocean airborne remote sensing LIDAR methods are based on the analysis of intensity, spectra, polarization, angular and temporal characteristics of the reflected LIDAR echo-signal, which appears by sounding water subsurface layers with short strong laser pulses. The LIDAR was designed and manufactured by "MULTITEKH" company from St.- Petersburg in 2001. It was named polarization aviation LIDAR (PAL-1). This LIDAR system was installed and operates onboard of the research aircraft Antonov-26 (An-26) named "Arktika". PAL-1 is operated by PINRO specialists. PAL-1 has no analogues in Russia in modern stage for carrying out air research in the interests of fisheries oceanography. During this time PAL-1 was highly successfully, reliably, effectively and qualitatively used in remote sensing detection of upper sea water layers (penetration depth is dependent on sea transparency), including oceanographic parameters (transparency, picnocline depth, subsurface plankton concentration), detection of fish aggregations, and first mackerel, determination of vertical profiles and optical characteristics for difference water type (masses).