北斗系统广播电离层参数精度的评估

Initial Assessment of BDS Broadcast Ionospheric Parameters Accuracy

针对北斗系统广播电离层参数精度的评估问题,采用国内陆态网观测数据对CODE格网模型进行精化,并利用精化后的CODE格网模型进行评估。算例采用2013年1月到10月中国陆态网的观测数据,对北斗系统的电离层参数精度进行了日间和夜间的分别评估,结果显示,改正参数在日间的精度平均值为80.5%,在夜间为76.7%,全天平均精度为78.6%,这可为iGMAS监测评估提供一定的参考。

For the evaluation of BDS broadcast ionospheric parameters accuracy,we use hte domestic observations to refine the CODE grid model,and take a evaluation using refinement CODE grid model.Examples using Chinese state network observation data during January to October 2013,the accuracy of BDS ionospheric parameters were assessed separately during the day and night,the results show that the accuracy of correction parameters for the 80.5% average of the day,at night was76.7%,an average accuracy of 78.6%throughout the day,this can provide a reference for iGMAS monitoring and evaluation.