摘要
简要介绍了EGM2008全球重力场模型,以及利用EGM2008模型计算地面点高程异常的原理,指出了在已知GPS控制网内一点正常高的情况下,如何应用该模型通过计算高程异常进而推算网内各点正常高的方法。结合在冀东某地山区和海滨的两个实验区数据,对使用上述GPS高程转换方法所能达到的精度进行了分析,结论认为在小区域内可以达到四等水准测量精度。
Introduced to use EGM2008 model to calculate the elevation of the ground point exception principle. Pointed out that when an elevation known of GPS control network, How to apply EGM2008 through calculating height anomaly and prediction network the method of normal height. Use of jidong somewhere mountainous area and the beach two experimen-tal plot data, to use the GPS height conversion method can achieve accuracy are analyzed, the conclusion is that in the small area can achieve fourth-order leveling precision.
出处
《北京测绘》
2013年第1期79-82,共4页
Beijing Surveying and Mapping
