PROPAGATION CHARACTERISTICS OF LOW-LATITUDE Pi2 PULSATIONS IN EAST-WEST DIRECTION
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摘要: 1996年10月10日至11月29日在地磁北纬29.6°附近(L=1.3)的新疆喀什、甘肃安西和北京,沿东西方向建立了地磁脉动观测台链.根据观测数据,研究了低纬Pi2脉动东西方向的传播特性和偏振特性,发现黄昏区以东向传播的右旋偏振为主,2000LT以后逐渐转为以西向传播的左转偏振为主,在2230LT有一个传播方向的突变.整个夜间偏振主轴方向基本以0000LT为界,0000LT前以NE-SW方向为主,0000LT后以NW-SE方向为主.Abstract: An array of three low-latitude pulsation stations was established at Kashi, Anxi and Beijing near geomagnetic latitude 29.6°N (L = 1.3) from Oct. 10 to Nov. 29 in 1996. According to observation data, propagation and polarization characteristics of low-latitude Pi2 pulsations are studied. It is found that eastward propagation with right-handed polarization is dominant in dusk, westward propagation with left-handed polarization are dominant after 2000LT. There is a sudden change of propagation at 2230LT. 0000LT (midnight) is a demarcation line of major axes azimuth basically. NE-SWare dominant before the midnight. NW-SE are dominant after the midnight.
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Key words:
- Low-latitude /
- Pi2 pulsations /
- East-west propagation.
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