Study on Water Depth Observation at Chinese CTD Stations in Antarctica Based on Large Deviation Theory

Antarctic marine environment research is of practical significance because Antarctic marine environment monitoring, control and protection are the important tasks both at home and abroad. In this paper, the large deviation mathematical model of the maximum seawater observation depth at Chinese CTD stations in Antarctica is established, the large deviation calculation principle of maximum seawater observation depth at CTD stations in Antarctica is given, and the optimization algorithm of maximum observation depth of seawater at CTD stations is proposed, the examples are analyzed and calculated, the conclusions suggest that (1) The adverse Antarctic environmental conditions have a significant impact on the measurement accuracy, the deeper the sea water is, the greater the impact will be. (2) The eigenvalue of the high precision observation data can be extracted with a smaller number of measurement times in shallow water. (3) It needs multiple measurements to get a certain accuracy of the eigenvalue in deep water.