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利用中国境内连续运行的GPS跟踪站提供的高时空分辨率的双频观测数据,初步分析了2003年11月3日太阳耀斑期间电离层的波动特性.当天PRN23号GPS卫星的VTEC及其变化率曲线表明,此次电离层波动基本沿着经线向南运动,且主要包含了两种频率的运动.另外,结合局域面VTEC涨落的谱分析及穿刺点与电离层波动的相对运动分析表明,中纬度地区,这两种频率的波动主要体现为周期分别为1小时左右和20~30分钟的运动;周期为1小时左右的大尺度电离层波动,其振幅会达到1~2TECU左右,速度会达到120~150m/s,且波动速度会随着纬度的降低而变快;周期为20~30分钟的小尺度电离层波动,其振幅约为0.4~0.7TECU,速度在30~40m/s左右.
Based on the dual-frequency observations with high spatio-temporal resolution provided by GPS tracking stations continuously operating in China, the fluctuation characteristics of the ionosphere during the solar flare on November 3, 2003 were analyzed preliminarily.The VTEC and its rate of change of the PRN23 GPS satellite on that day The curve shows that this ionospheric fluctuation basically moves south along the longitude line and mainly includes two kinds of frequency motions.In addition, the spectral analysis of the VTEC fluctuation in the local area and the relative motion analysis of the puncture point and ionospheric fluctuation show that In the mid-latitude region, the fluctuations of these two kinds of frequencies are mainly reflected in the periods of about 1 hour and 20 to 30 minutes respectively. The large-scale ionosphere with a period of about 1 hour fluctuates with an amplitude of about 1 to 2 TECU. Will reach 120 ~ 150m / s, and the wave velocity will become faster with the decrease of latitude. The fluctuation of small scale ionosphere with period of 20 ~ 30 minutes is about 0.4 ~ 0.7TECU and the velocity is 30 ~ 40m / s about.