摘要
电离层延迟是卫星导航定位的重要误差源之一。采用合适的电离层延迟模型可以有效地减弱电离层延迟误差对定位结果的影响。目前在导航定位中运用最广泛的是Klobuchar模型,但Klobuchar模型的修正率只有50%~60%。为了满足日益增长的导航定位精度的需求,不同的精化模型被提出。本文介绍了Klobuchar模型在GPS和BDS系统中的应用,比较了在两个系统应用时的差异。回顾概括了文献在Klobuchar模型的参数精化和模型精化两个方面的研究,并对各种精化模型进行了对比总结。模型精化的结果优于参数精化,未来对于Klobuchar模型的精化更趋向于模型精化。
It is needed to utilize a befitting ionospheric model to eliminate ionospheric delay effectively,one of the most important sources of errors in GNSS. Nowadays,Klobuchar is the most widely used ionospheric model in single-frequency navigation and positioning. As the fact that Klobuchar only possesses a correction rate from 50% to60%,different refined models have been proposed for a higher and higher accuracy of navigation and positioning.The applications and differences of Klobuchar model in GPS and BDS are introduced,and the previous researches on refinements of Klobuchar ionospheric models,including parameter and model refinements,are reviewed and generalized in this paper. Compared with parameter refinement,model refinement has better performance and prospects in Klobuchar model refinement.
出处
《测绘科学技术学报》
CSCD
北大核心
2017年第5期455-460,共6页
Journal of Geomatics Science and Technology
基金
国家自然科学基金项目(61272146)
