单站地基北斗信号传播机制及对流层参数反演研究

The research on the key technology of estimation of troposphere refraction parameter with singular ground COMPASS station.The COMPASS signal propagation mechanism is inverstigated with electric wave progation and atmosphere parameter modeling theory.Based on the traditional GNSS point positioning and electromagnetic wave propagation theory,some technical difficulties on COMPASS data preprocessing,error elimination and parameter estimation,are solved.Combined with COMPASS ephemeris,estimation model of troposphere slant delay and bending angle is established.The refractivity profile inversion model is established based on troposphere slant delay and support vector machine optimization arithmetic. The time-varying characteristics of troposphere and COMPASS satellite clock error is investigated and quantified.Combined with COMPASS different elevation signal in little hour and broadcast ephemeris, the model of real time estimation of troposphere refraction parameter is studied and established. At present,the atmospheric sounding technology based on singluar GNSS station has the advantages of high precision,low cost,simple operation and become the focus of international research.The basic study conditions has been matured, and the innovative result will be achieved.The expected production will provide a new method for the study on atmosphere environment detection and refraction error correction.The value is important in the navigation and atmosphere detection domain.

课题围绕单站北斗获取对流层折射参数特征的关键技术开展深入研究，基于电波传播和大气参数空间分布建模理论，研究分析北斗信号传播机制与特性；基于传统GPS精密单点定位原理，解决北斗数据预处理、误差消除方法、参数估计等若干技术难点。结合北斗星历，建立单站北斗估计对流层斜延迟和弯曲角模型；综合利用大气参数模型和传播参数模型，有机结合现代优化算法，建立对流层折射率廓线反演模型。研究并量化对流层的时变特性和北斗卫星钟差时变特性，结合北斗时间序列信号，探索研究一种利用北斗广播星历建立实时获取对流层折射参数的新方法。当前，单站GNSS探测大气技术因具有精度高、成本低、操作简单等优点，成为当今国际研究热点。目前研究条件基本成熟，基于北斗有望取得创新性成果，预期成果为对流层环境探测和折射修正提供新的研究方法和途径，在卫星导航和大气探测领域具有重要意义。

项目建立了单站北斗估计对流层斜延迟和弯曲角模型，综合利用大气参数模型和传播参数模型，有机结合现代优化算法，建立对流层折射率廓线反演模型。研究了对流层的时变特性和北斗卫星钟差时变特性，结合北斗时间序列信号，探索研究并建立了一种利用北斗广播星历建立实时获取对流层折射参数的新方法。单站GNSS探测大气技术因具有精度高、成本低、操作简单等优点，已成为当今国际研究热点。成果在对流层环境探测和环境误差校正等方面具有重要的应用价值。