摘要
随着GPS技术的不断发展，连续运行跟踪站（CORS）已广泛应用于大地坐标框架的建立与维护，基准站的稳定性对区域框架的构建具有重要的作用。本文介绍了基准站稳定性分析的方法，针对全球基准与局部固定基准等方法没有考虑点位在平面与高程方向的季节性与其它随机扰动非线性影响的不足，研究了一种“顾及板块运动与点位非线性影响的区域基准模型”。以位于块体运动强烈的某城市CORS基准网为例，验证了该方法的有效性，并建议定期对基准站进行时间序列和稳定性分析，构建区域动态框架。
With the development of GPS technology, the CORS has been widely used in city datum construc- tion, and the stability of GPS fiducial station plays an important role in establishing and maintaining regional frame. This paper introduced methods for reference station stability analysis and pointed out that traditional methods like global datum and local fixed datum were deficient, since they did not take the seasonal variation of stations in plane and elevation direction and other random disturbance nonlinear effects into consideration. To correct these deficiencies, a regional datum model considering the plate movement and station nonlinear effect was established. The validity of the model was verified with CORS datum network of a certain city located in tectonically active region. It was suggested that time series and stability analysis of GPS reference station should be conducted regularly, and dynamic regional datum be constructed.
出处
《测绘科学与工程》
2012年第2期14-19,共6页
Geomatics Science and Engineering
