淡水湖泊声速算法改进  

An Improved Method for Calculating Sound Speeds in Freshwater Lakes

作　　者：唐建[1] 高飞[2] 李胜全[2] 

机构地区：[1]南海舰队海洋水文气象中心,广东湛江524001 [2]海军海洋测绘研究所,天津300061

出　　处：《海洋测绘》2016年第3期72-74,78,共4页Hydrographic Surveying and Charting

基　　金：国家自然科学基金(41276088);国家海洋公益性行业科研项目(2012050007-7)

摘　　要：针对常见的海洋声速算法Delgrosso、Wilson、Chen-Millero、Mackenzie、Leroy对淡水湖泊计算不准的问题,利用水下滑翔机在千岛湖测量得到的温、盐、深与声速仪数据,采用最小二乘法研究改进Mackenzie声速算法,主要通过调整初始声速值、(S-A1)及深度二次方变化项这三项的计算系数来提高对淡水湖泊的声速计算精度。结果表明,改进算法对淡水湖泊声速计算效果较好,平均偏差控制在0.5m/s。The common seawater sound speed calculation methods of Delgrosso,Wilson,Chen-Millero,Mackenzie,Leroy cannot provide precise calculation results for freshwater lakes. In this paper,the temperature,salinity,depth and sound speed data from autonomous underwater vehicles in Qian Dao lake are used to analyze the improved Mackenzie calculation method based on the least squares algorithm. The calculation precision of sound speeds in freshwater lakes can be improved mainly by changing three parameters: the initial sound speed,( S-A1) and quadratic change items of depth. The results showthat the improved method can calculate sound speeds of freshwater lakes well,and the average deviation is within 0. 5m / s.

关 键 词：淡水声速 湖泊声速 改进Mackenzie算法 最小二乘法 水下滑翔机 

分 类 号：P229[天文地球—大地测量学与测量工程]