北斗卫星导航系统电离层模型预报性能分析  

Analysis of the Forecast Performance of BDS Ionospheric Model

作　　者：吴沫 曾欣 魏涛 

机构地区：[1]北京卫星导航中心,北京100094

出　　处：《测绘科学与工程》2014年第4期70-73,共4页Geomatics Science and Engineering

摘　　要：北斗卫星导航系统发播的导航信息中，电离层延迟改正模型参数采用Klobuchar模型进行解算并预报。将Klobuchar模型按用户使用的预报模式和事后处理模式分别进行数据处理得到相应的VTEC，与IGS提供的GIM数据和北斗监测接收机双频数据进行比较，Klobuchar模型结果与GIM数据和双频改正数据之差均值为8—9TECU左右，约占电离层延迟改正比例的30—40％；以双频数据为参考，目前北斗系统采用的模型预报模式与事后处理模式相比电离层延迟改正精度略有降低0．03％-0．73％。The Klobuchar model is used to calculate and forecast ionosphere delay of the BDS broadcasting information. In this paper, VTEC obtained by processing data with the Klobuehar model in forecast mode and post - event processing mode respectively is compared with GIM data provided by IGS and double frequency data from BeiDou monitoring receiver. The average bias between the Klobuchar model result and the GIM data and the BeiDou double frequency correction data is 8 - 9TECU, about 30 - 40% of the ionospheric delay correction. Taking the double frequency data as a reference, the ionospheric delay correction accuracy in the forecast mode is 0.03% - 0.73% lower than that in the post- event processing mode.

关 键 词：北斗卫星导航系统 电离层模型 电离层延迟误差 KLOBUCHAR模型 电离层延迟改正 

分 类 号：TN967.1[电子电信—信号与信息处理]