顾及波浪影响和深度约束的水下控制网点绝对坐标的精确确定

为解决传统海底控制网点绝对坐标确定费时费力、垂直解精度不高的问题，提出一种顾及波浪影响和深度约束的水下控制网点绝对坐标精确确定方法。首先，开展了波浪影响研究，提出水下控制网点间高差确定方法以及利用该高差和GNSS垂直解的网点绝对高程确定方法。在此基础上，提出附加深度约束的圆走航单点绝对三维基准传递法、深度约束的二维自由网平差法及联合点间高精度深度差的组合约束平差法和三维联合约束平差法。最后对提出的方法进行验证。该方法可提高作业效率，将传统方法高程确定精度提高了1个量级。

Determination of Absolute Coordinate of Underwater Control Point Taking Waves and Depth's Constraint into Account

To solve the problem that traditional underwater control point absolute positioning is time-consuming and laborious with low vertical precision,itis put forward that an accurate method with constraints of depth while taking waves into account to get absolute coordinate of underwater control point.Firstly,studiesarecarried outon the wave impact.And methods are put forward to determine the elevation difference between underwater points and the absolute elevation with GPS vertical values and the elevation difference.On this basis,methods are put forward,such asthe circle navigationwith depth's constraint to get single point's absolute coordinate,2D free net adjustment with depth's constraint, integrated constraint adjustment,with accurate elevation difference,and 3D combined adjustment with accurate elevation difference.Finally,the experimental results show that the proposed methods can double the efficiency of traditional methods and improveprecision by one order of magnitude.