Monitoring of Ionospheric Anomaly Using COSMIC Occultation Measurementsormalsize
-
摘要: 分析了COSMIC掩星数据反演电子密度的方法,利用实例研究反演方法的特点,并采用ISR非相干散射雷达获取的电子密度数据进行验证,进而反演了长三角区域SHAO(IGS)站上空在日全食和太阳风暴期间的电子密度廓线图. 通过与平静日期间电离层电子密度进行比较,发现日全食及太阳风暴导致电离层发生的异常变化,从而提出COSMIC掩星数据反演电子密度在监测电离层变化时所具有的优势.Abstract: The paper introduces the method of electron density inversion using COSMIC occultation data, and advantages of the inversion method are analyzed using practical calculation. Meanwhile, electron density profiles obtained from ISR (Incoherent Scattering Radar) are compared and analyzed with those from COSMIC occultation. Finally, electron density profiles over the SHAO (IGS station) which is located in Yangtze river region, are reversed using COSMIC occultation measurements during the total solar eclipse and the solar storm, and are compared with electron density profiles during the quite day. Ionospheric anomaly caused by the total solar eclipse and the solar storm are analyzed. The advantages of the inversion method from COSMIC occultation data have been found by using inversion method to monitor the ionosphere anomaly.
-
Key words:
- COSMIC occultation /
- ISR (Incoherent Scattering Radar) /
- Electron density
-
[1] Lei Xiaolong, Fu Yang, Xue Zhengang. Validation of global VTEC maps constructed using data derived from COSMIC constellation[J]. Chin. J. Space Sci., 2012, 31(6):754-764. In Chinese (雷霄龙, 符养, 薛震刚. 利用COSMIC数据构建的全球垂直TEC图 的验证研究[J]. 空间科学学报, 2011, 31(6):754-764) [2] Wang Hu, Wang Jiexian. Real-time monitoring of ionosphere changes in the Yangtze River Delta region based on GPS technology during the total solar eclipse of 22 July 2009[J]. Chin. J. Geophys., 2011, 54(7):1718-1726. In Chinese (王虎, 王解先. 基于GPS技术实时监测2009年7月22日日全食期间 长三角区域电离层TEC变化[J]. 地球物理学报, 2011, 54(7):1718-1726) [3] Lei J, Liu L, Wan W, Zhang S. Modeling the behavior of ionosphere above Millstone Hill during the September 21—27, 1998 storm[J]. J. Atmos. Solar Terr. Phys., 2004, 66:1093-1102 [4] Lei J, Syndergaard S, Alan G. Burns, et al. Comparison of COSMIC ionospheric measurements with ground-based observations and model predictions: Preliminary results[J]. J. Geophys. Res., 2007, 112, A07308:1-10 [5] Jakowski N, Wehrenpfennig A, Heise S, et al. GPS radio occultation measurements of the ionosphere from CHAMP: Early results[J]. Geophys. Res. Lett., 2002, 29(10):951-954 [6] Morton Y T, Graas F Van, Zhou Q, Herdtner J. Assessment of the higher order ionosphere error on position solutions[J]. Navigation, 2009, 56(3):185-193 [7] Morton Y T, Moore R, Graas F Van. GPS signal propagation mode impact on receiver position errors[C]//2010 Institute of Navigation International Technical Meeting. San Diego: Institute of Navigation, 2010: 596-602 [8] Matteo N A, Morton Y T. Higher order ionospheric error at Arecibo, Millstone, and Jicamarca[J]. Radio Sci., 2010, 45, RS6006:1-12
点击查看大图
计量
- 文章访问数: 1134
- HTML全文浏览量: 70
- PDF下载量: 1982
- 被引次数: 0