摘要
高程异常拟合是GPS高程测量应用于实际工作的重要技术手段,高精度地求解高程异常是技术关键。本文提出了顾及EGM2008重力场模型的高程异常拟合方法,通过EGM2008重力场模型计算高程异常长波项,并对剩余高程异常利用加权组合模型进行拟合。通过江苏省某市的实测数据验证顾及EGM2008重力场模型的加权组合模型拟合方法。结果表明,该方法的精度达到了厘米级,高程异常拟合效果最大提升了30%。
Height anomaly fitting is an important technical means that the value of GPS height measurement is applied in practice. In this paper,the height anomaly fitting method based on EGM2008 gravity field model is proposed that the long wave item of height anomaly is calculated through EGM2008 gravity field model and the residual height anomaly is fitted through weighted composite model. The measurmnent data is used to verify the performance of weighted combination model based on EGM2008 gravity field model in the city of Jiangsu province. Numerical results show that the method proposed can increase the performance of this method by 30% and reach centimeter-level in height anomaly fitting.
出处
《测绘通报》
CSCD
北大核心
2018年第1期28-32,共5页
Bulletin of Surveying and Mapping
基金
国家自然科学基金(51374209)
国家重点研发计划课题(2016YFB0502102)
