两种区域似大地水准面再精化方案的绩效分析

Performance Analysis of Two Regional Quasi-geoid Re-refinement Schemes

随着卫星导航定位技术的快速发展,人们对实时获取高精度平面和高程基准成果的需求越来越迫切。厘米级区域似大地水准面精化技术的发展为实时获取大地和高程基准成果提供了可能。分别介绍了利用GNSS/水准点和基于高程异常控制网两种区域似大地水准面再精化的方案思路,结合扬州市似大地水准面精化项目进行设计实施,从工作量、作业时间等多方面对两种方案进行综合比较分析,结果表明,基于高程异常控制网方案大幅提升了区域似大地水准面精化项目的项目绩效,对今后区域似大地水准面精化工作的开展具有较好的参考意义。

With the rapid development of satellite navigation and positioning technology, it is more and more urgent to obtain the high-precision plane and elevation datum in real time. The development of centimeter-level regional quasi-geoid refinement technology has made it possible to obtain real-time geodetic and elevation datum results. This paper introduces two regional geoid re-refinement schemes based on GNSS/leveling point and elevation anomaly control network respectively, and combines the design and implementation of Yangzhou geoid refinement project, and makes a comprehensive comparison and analysis of the two schemes from the aspects of workload and operation time. The results show that the scheme based on elevation anomaly control network greatly improves the project performance of regional quasi-geoid refinement project, which has a good reference significance for the implementation of regional quasi-geoid elaboration in the future.