低高度角地基GPS联合反演大气折射率廓线

Joint inversion of atmospheric refractive profile based on the low-elevation ground-based GPS observation

为充分利用电磁波在大气中传播所携带的信息反演大气折射率廓线,提高低高度角地基GPS反演折射率廓线的精度,本文通过多目标优化反演算法NSGA-II,基本实现了GPS电磁波传播损耗和相位延迟观测量的最优联合反演。数值试验表明,联合反演效果明显优于传统的GA(Genetic Algorithm)单目标反演算法,加噪试验进一步证明了最优联合反演算法在反演折射率廓线方面的可行性及优越性。

To make full use of the information carried by the electromagnetic wave propagation in the atmosphere to invert the atmospheric refractive profile,and to improve the inversion precision based on the low altitude angle ground GPS,this paper has realized the joint optimal synchronous inversion with the GPS electromagnetic wave propagation loss and phase delay by the multi-objective optimization inversion algorithm NSGA-II. Numerical experiment shows that the joint inversion effect is superior to the traditional single objective GA（ Genetic Algorithm） inversion,and noise adding test further demonstrates that joint optimal synchronous inversion has feasibility and superiority in the inversion of refractive profile.