中文摘要：

针对Rob Hare提出的多波束测点位置归算精度估计模型的不足,建立了顾及各项改正数之间相关性的改进模型。在多波束测点位置归算模型的基础上,分析了影响测点位置归算的各项误差来源,推导了各误差源对测点位置归算精度估计的影响量,结合算例,分别利用两种模型计算了各误差源对测点位置归算精度的影响量级,绘制了各误差源的误差曲线图与总位置误差曲线图,通过对计算结果的分析比较,得出了两种模型在评估多波束测点位置归算精度时存在的差异,由于顾及到改正数间的相关性,认为改进模型更加科学合理。

英文摘要：

To resolve the problem of the insufficient precision estimation model for multibeam measurement point position reduction presented by Rob Hare, an improved model is built considering the correlation among corrections. On the basis of the new model, this paper analyzes the influence of various error sources on measurement point, and deduces the influence quantity of error sources on the reduction precision estimation of measurement point position. Combined with calculating examples, the error curve of each error source as well as the total position error curve are derived by using two kinds of models to calculate the influence level of error sources on measurement point position reduction. Through analysis and comparison of calculated results, the differences of the two models are obtained when assessing the reduction precision of multibeam measurement point position. In the light of the correlation among corrections, the improved model is regarded more scientific and reasonable.