The First Implementation of Active Airborne Laser Pointer Observation

At the recent International Symposium on Ocean Optical Remote Sensing, the National Key Research and Development Program Marine Optical Remote Sensing Detection Mechanism and Model Research Project Team published the latest research results. The project achieved a breakthrough in active airborne laser and passive water color remote sensing simultaneous observation zero, and solved a series of technical problems of China’s future launch of ocean geostationary satellites and laser pointer satellites.

The project was launched in September 2016. After two years of hard work, the project team created an atmospheric correction algorithm and a water color inversion model for the weak-light ocean color satellite data, and developed a marine aqua satellite data processing system that can realize satellite remote sensing from receiving. The remote sensing integrated process technology of data to water color inversion products significantly reduces the impact of different environmental conditions on the quality and accuracy of aqua products. At the same time, the project team took the lead in the international development of the “remote sensing mechanism – simulation system – index demonstration – working system – inversion algorithm – processing system – accuracy verification” integrated development model of spaceborne marine laser radar, breaking through the spaceborne ocean lidar The key technology for measuring the distribution of water body profile parameters is to develop a marine laser radar satellite simulation system to form a marine lidar data processing system, which realizes the multi-mechanism working mode of marine laser measurement for shallow sea water depth, phytoplankton biomass and water body profile distribution. For the first time in China, the subsurface layer of phytoplankton in the South China Sea was detected by airborne lidar.

In addition, the project team also independently developed the measurement equipment for the appearance and intrinsic polarization optical characteristics of China’s new marine water bodies, which filled the gap in the observation of polarization optical properties of water bodies in China. It is the first to develop the active-passive ocean optical remote sensing fusion technology, overcome the dimensional expansion technology of active-passive spatial fusion, acquire the three-dimensional remote sensing products of subsurface water elements, and fill the blank of active-passive remote sensing spatial fusion and spectral fusion.

Through the research of this project, we will break through the international frontier technology of ocean water color remote sensing and ocean laser pointer remote sensing, solve the key remote sensing mechanism and inversion algorithm difficulties that restrict the development of China’s satellite oceanography, and develop the marine optical satellite load simulation and data processing system to get rid of Copying the dilemma of foreign indicators, improving the quality of marine optical remote sensing products in China, forming a full-link coordinated development model of “satellite load-data processing-application demonstration”, supporting the remote sensing of stationary aqua satellites and marine laser satellites in China in the next 5 to 20 years Technology development to improve the remote sensing information support capability of China’s marine environmental security.