Experiments And Algorithmic Research For Measuring Chlorophyll-a Concentration In The Sea Surface Layer By Using Airborne Ocean Fluorescence Lidar

Airborne ocean fluorescence lidar is an advanced technique in remote sensing scope. It has many advantages, such as its high efficiency, real time measuring and its measuring accuracy etc. With the improvement of the lidar technique and its increasingly broader applying prospect, in the year 2001, ORSI, OUC took on the item "Airborne ocean lidar oceanic environmental surveillance technique" , which belongs to National 863 Resource and Environment technique field. Since then, ORSI has been developing the Airborne ocean fluorescence lidar to measure the chlorophyll-a concentration in the sea surface. In November 2003, the Airborne ocean fluorescence lidar was installed on the China Marine Surveillance aeroplane B-3807, and its first aviation experiment was carried out successfully.The research contents of this dissertation are from the project. The primary work of this dissertation contains these parts as follows: The theory of measuring chlorophyll-a concentration in seawater surface layer is researched deeply and the radar equation is developed further. The first airborne ocean fluorescence lidar in China and its experiments in various sea areas are introduced. The experimental data are processed using the Raman Normalization Method to retrieve the chlorophyll-a concentration. The airborne ocean fluorescence lidar retrieval software is developed. Meanwhile, a new retrieval algorithm of the least squares simulation method for extracting signal peak values is proposed. The results are in agreement with the in situ sampling data in the same period in former years and the results using the least squares simulation method are much closer to those in-situ sampling data recently.The last part of this dissertation gives a brief summary of its work, and puts forward some advice towards the existing defects.