长距离高精度GNSS跨水域水准测量方法研究

Study on Long-distance and High-precision GNSS Water-crossing Leveling Method

文章详细论述了长距离高精度GNSS跨水域水准测量方法的原理,并通过实际测量结果验证所提出的GNSS跨水域水准测量曲线拟合法的技术方案可靠有效。实验表明,在长距离GNSS跨水域水准测量中,非跨水域测量点之间的距离一般不得低于跨水域测量点距离的35%,最好在50%以上;采用曲线拟合法求取长距离跨水域测量点的高差,其精度完全能满足规范要求。

This paper discusses the principle of the long-distance and high-precision GNSS water-crossing leveling method in detail,and the reliability and effectiveness of technical solution of GNSS water-crossing leveling curve fitting method proposed in this paper are verified by the practical measurement results.The experiment shows that in the long-distance GNSS water-crossing leveling,the distance between non-water-crossing measurement points generally should not be less than 35%of that between water-crossing measurement points,preferably more than 50%.The accuracy of altitude difference between long-distance water-crossing measurement points obtained by using the curve fitting method can completely meet the specifications.