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针对岸船卫星双向时间比对中船载时统站空间运动引起的对时误差估算问题,通过分析测量船六自由度运动规律,从而选定考察点,建立测量船质心坐标系;提出在一个对时周期内(约0.27s)船载站考察点空间运动总量估算模型,并给出岸船卫星双向时间比对精度估算方法。在分析测量船各维度运动量对岸船对时精度影响的基础上,得出了校正公式。计算结果表明:正常测量工况下,岸船卫星双向时间比对精度优于9ns;基于现有测量手段,校正后岸船卫星双向时间比对精度可达3.41ns(3σ,取陆基站间对时精度为1ns)。
Aiming at the problem of estimating the timing error caused by the space motion of the STS during the two-way time alignment of the ship and ship, by analyzing the movement rule of the six degrees of freedom of the ship, the inspection points are selected and the centroid coordinate system of the survey ship is established. During the period of time (about 0.27s), the model for estimating the total amount of space motion at the shipborne station is given and the accuracy of two-way time alignment of the satellites is estimated. Based on the analysis of the influence of the movement of each dimension of measurement vessel on the accuracy of the shore-ship alignment, the correction formula is obtained. The calculation results show that the precision of the alignment accuracy of the shore-ship satellite is better than 9ns in the normal measurement conditions. Based on the existing measurement methods, the accuracy of the alignment of the backshore satellite can be 3.41ns (3σ) When the accuracy of 1ns).