EGM2008和北斗地基增强系统在工程测量中的应用  

Application of EGM2008 and Beidou Foundation Augmentation System in Engineering Measurement

作　　者：李玉忠 LI Yuzhong

机构地区：[1]青海省基础测绘院,青海西宁810000

出　　处：《地理空间信息》2020年第9期84-86,I0006,共4页Geospatial Information

摘　　要：通过实际项目验证了北斗地基增强系统和全球EGM2008重力模型的精度,并尝试采用了“互联网+位置(北斗)”的新的外业作业方式。结果表明,经过基准面差异改正后得到的EGM2008重力模型高程异常精度在研究区内可达到1.2 cm;实验测区北斗地基增强系统与JSCORS的平面差异在3 cm以内。In this paper,we examined the accuracy of the Beidou foundation augmentation system and the global EGM2008 gravity model in the actual projects,and attempted to adopt the new field operation mode of"Internet+Location(Beidou)".The result shows that the elevation accuracy of the EGM2008 model can reach 1.2 cm in the region after the correction of the datum plane gap.The difference between the Beidou foundation augmentation system and the JSCORS in the experimental area is less than 3 cm.

关 键 词：北斗地基增强系统 EGM2008重力模型 高程异常 JSCORS 

分 类 号：P228.4[天文地球—大地测量学与测量工程]