Real-time Monitoring Regional Ionospheric Variety of China with BDS Observations
-
摘要: 北斗卫星导航信号采用三个频点工作,可以利用伪距双频组差方法解算电离层电子含量,为实时监视中国区域电离层变化提供新的技术手段.中国中低纬度处于电离层赤道异常变化区,在北纬20°±5°区域时常发生较大梯度的电离层变化.利用北斗实时多频伪距和相位观测数据,采用相位平滑伪距方法计算电离层穿刺点电子含量,分析通过北斗系统GEO卫星监测的电离层周日变化特性;采用多面函数方法拟合中国区域1°×1°分辨率的电离层延迟量,每5min绘制一幅中国区域电离层图,观测区域所有电离层穿刺点拟合残差RMS为2.778TECU;分析北斗系统实时监测中国区域电离层异常情况,当发生电离层异常变化时,相邻两天的VTEC(Vertical Total Electronic Content)峰值相差约60TECU.Abstract: BDS provides uninterrupted PNT service for Asia-Pacific area since 27 December 2012, when China released an official version of the complete BDS Interface Control Document (ICD) for open service Signal-In-Space (SIS). Because BDS signals working at three frequencies, ionospheric delay can be calculated with pseudo-range dual-frequency combination technique and a new technique to monitor ionospheric variety over China is established. Lower-middle latitude area of China is in the ionospheric equator anomalies region and large grads ionospheric varieties often occur within the area of north latitude 20°±5°. Daily variety characteristic of ionospheric delay measured with BDS GEO satellites is analyzed by using BDS real-time pseudo-range observation and adopting carrier phase smoothed pseudo-range. China region ionospheric map is painted in 1°×1° scale with polyhedral fitting every 5 minutes and the average fitting error RMS of all Ionospheric Punch Point (IPPs) is 2.778TECU. The ionospheric anomalies around China monitored with BDS observation shows that the VTEC peak difference between adjacent two days can be 60TECU when large scale ionospheric anomaly occurs.
-
[1] RATCLIFFE J A. Ionosphere Disquisition for Fifty Years[M]. Beijing:Science Press, 1983(拉特克利夫J A. 电离层研究五十年[M]. 北京:科学出版社, 1983) [2] LIN Jian. GPS Ionospheric Observation Techniques and Its Application in Earthquake[D]. Wuhan:Wuhan University, 2011(林剑. GPS电离层观测技术及其在地震中的应用研究[D]. 武汉:武汉大学, 2011) [3] ZHANG Hongping. Study on GPS Based China Regio-nal Ionosphere Monitoring and Ionosphere Delay Correction[D]. Shanghai:Shanghai Astronomical Observatory, Chinese Academy of Sciences, 2006(章红平. 基于地基GPS的中国区域电离层监测与延迟改正研究[D]. 上海:中科院上海天文台, 2006) [4] China Satellite Navigation Office. Beidou Navigation Satellite System Signal In Space Interface Control Do-cument Open Service Signal B1I (Version 1.0)[M]. 北京:中国卫星导航系统管理办公室, 2012(中国卫星导航系统管理办公室, 北斗卫星导航系统空间信号接口控制文件公开服务信号B1I (1.0版)[M]. Beijing:China Satellite Navigation Office, 2012) [5] LIU Jingnan. Principles and Methods of Wide Area Differential GPS[M]. Wuhan:Surveying and Mapping Press. 1999(刘经南. 广域差分GPS原理和方法[M]. 武汉:测绘出版社, 1999) [6] WU Xiaoli, HAN Chunhao, PING Jinsong. Monitoring and analysis of regional ionosphere with GEO satellite observations[J]. Acta Geodaet. Cartog. Sin., 2013, 42 (1):13-18(吴晓莉, 韩春好, 平劲松. GEO卫星区域电离层监测分析[J]. 测绘学报, 2013, 42(1):13-18) [7] DONG Enqiang, SUN Weijie, WU Xiaoli, et al. Application of Curve Surface Fitting in Regional Ionospheric Delay Model with Sparse Station Distribution[C]//China Satellite Navigation Conference (CSNC)Proceedings, Lecture Notes in Electrical Engineering 244. Berlin:Springer, 2013:357-366 [8] LIU Dajie, TAO Benzao. Process Methods of Practicality Observation[M]. Beijing, Mapping Express, 2000(刘大杰, 陶本藻. 实用测量数据处理方法[M]. 北京:测绘出版社, 2000) [9] CHANG Yifeng, CHAI Hongzhou, WANG Min. Study on construction of local marine geomagneti field model based on orthogonal least square multi-surface function[J]. J. Geod. Geodyn., 2012, 32(3):86-89(常宜峰, 柴洪洲, 王敏. 基于正交最小二乘多面函数构建局域海洋地磁场模型研究[J]. 大地测量与地球动力学, 2012, 32(3):86-89) [10] XIONG Nianlu, TANG Cunchen, LI Xingjian. An Introduction to Ionospheric Physics[M]. Wuhan:Wuhan University Press, 1995(熊年禄, 唐存琛, 李行健. 电离层物理概论[M]. 武汉:武汉大学出版社, 1999)
点击查看大图
计量
- 文章访问数: 1262
- HTML全文浏览量: 47
- PDF下载量: 1304
- 被引次数: 0