Analysis of the ionosphere wave-motion with GPS

Precise vertical total electron contents (VTEC) and its time variation have been obtained by using GPS dual-frequency observations collected by the continuously operating GPS tracking stations distributed over China. Using VTEC data, the wave-motion appearing in the ionosphere on November 3, 2003 is monitored and analyzed when a small solar flare happened. Detailed discussion with the VTEC and its change rate series, which are derived from the observations (data) from PRN23 satellite, indicates that the wave-motion mainly contains two dominant frequencies and propagates almost along the meridian line toward south. Additionally, the fluctuation of the mean VTEC has been calculated in a regional Single Layer Model (SLM) ionospheric shell in the range of N28.0°―34.0° and E118.0°―123.0°. The spectral analysis and the multi-resolution analysis of mean VTEC time series show that the periods of these two components of the wave-motion at middle altitude are around 60 and 25 min separately, and the amplitudes can be up to 1.0―2.0 TECU and 0.4―0.7 TECU respectively. Mean- while, the relative motion between the wave-motion and the Ionosphere Pierce Points (IPPs), which are defined as the cross points between the line-of-sight of the GPS signals and the SLM thin shell, reveals that the traveling speeds of the two components are about 120―150 m/s and 30―40 m/s respectively.

作 者： Zhang Hongping Zhu Wenyao PENG Junhuan HUANG Cheng   作者單位： Zhang Hongping(Shanghai Astronomical Observatory, Chinese Academy of Sciences, Shanghai 200030, China;Graduate School of the Chinese Academy of Sciences, Beijing 100039, China)

Zhu Wenyao(Shanghai Astronomical Observatory, Chinese Academy of Sciences, Shanghai 200030, China;Key Laboratory of Advanced Engineering Survey of SBSM, Tongji University, Shanghai 200092, China)

PENG Junhuan,HUANG Cheng(Shanghai Astronomical Observatory, Chinese Academy of Sciences, Shanghai 200030, China) 

刊 名： 科學(xué)通報(bào)（英文版）  SCI 英文刊名： CHINESE SCIENCE BULLETIN  年，卷(期)： 2005 50(13)  分類號： P3  關(guān)鍵詞： GPS   VTEC   ionosphere wave-motion   relative motion   spectral analysis   wavelet analysis  

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