几种电离层模型折射修正效果检验  

Validating Effects of Ionospheric Delay Correction Models

作　　者：陈学军[1] 赵军[1] 王西京[1] 陈建荣[1] 张华[1] 杨慧影[1] 

机构地区：[1]西安卫星测控中心,西安710043

出　　处：《飞行器测控学报》2016年第3期181-187,共7页Journal of Spacecraft TT&C Technology

摘　　要：航天工程任务对航天器外弹道测量数据的精度需求不断提高,电离层折射误差已成为影响航天高精度测量的主要误差源之一。目前国际上基于多种观测数据建立了多种电离层模型,由于模型使用的数据和算法不同而有不同的修正精度。通过分析国内外常用的Klobuchar(克罗布歇)模型、国际参考电离层模型和中国参考电离层模型的特点,利用3个电离层模型对S频段多颗在轨卫星50多跟踪圈次的实测外测数据进行修正,以星载GPS(Global Positioning System,全球定位系统)数据获取的精密星历经过坐标变换、测站与卫星的几何关系计算可得到测站到卫星的距离,将其作为标准值,采用微波辐射计修正对流层折射误差后对3个电离层模型的修正结果进行比较检验,结果表明中国参考电离层模型在中国区域的修正结果优于其他2个模型,可为航天测控实时修正提供参考。With the increasing precision demand of spacecraft trajectory measurement data in space missions, iono- spheric refraction error has become one of major sources affecting high precision measurement of Telemetry Track- ing and Command （TT＆C） . Multifarious ionospheric models have been established based on a variety of observa- tion data in the world. Because of different data and algorithms used in the models, there are different precision of correction results. This paper analyzes the characteristics of Klobuchar, International Reference Ionosphere （IRI） model and Chinese Reference Ionosphere （CRI） model which are used throughout the world. The three models were used for correction analysis for more than 50 passes of the measured tracking data of several on-orbit S-band satel- lites, and the result were compared with standard value from the satellite to the station in combination with coordi- nate transformation and geometric relationship from high precise ephemeris. The correction of tropspheric refraction error is done with microwave radiometer, and the results indicate that CRI model is better than the other two mod- els for the Chinese region.

关 键 词：电离层模型 电离层折射误差 修正精度 中国参考电离层模型 

分 类 号：V557.5[航空宇航科学与技术—人机与环境工程]