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首页> 外文期刊>Journal of Geophysical Research, A. Space Physics: JGR >Ducting characteristics of Pc 1 waves at high latitudes on the ground and in space
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Ducting characteristics of Pc 1 waves at high latitudes on the ground and in space

机译：电脑1波高的管道特征纬度在地面和空间

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摘要

Well-defined ULF Pc 1 geomagnetic pulsations have been observed simultaneously from a ground array of five search-coil magnetometers in the morning sector of Antarctica on Mar. 23, 2007. Distributed over a very extensive range of geomagnetic latitudes (-62° to -87°, spanning ～2920 km geographically) approximately along a magnetic meridian, the array showed poleward propagation of the Pc 1 waves in the ionospheric waveguide. It is observed that attenuation factors are between ～8 and 20 dB/1000 km and the polarization sense changes from left-hand to right-hand as the waves are ducted poleward. However, a complex polarization pattern (i.e., change in ellipticity and major axis angle) was seen on the ground, which might be attributed to the array being close to the wave injection region where the superposed effect of incident waves and ducted waves is dominant. A CHAMP satellite conjunction showed a transverse and nearly linearly polarized Pc 1 ULF wave at the altitude of the ducting layer (～350 km) over a limited latitudinal extent (-53° to -61° ILAT). The polarization analysis performed using the ground data supports the idea that CHAMP detected the wave activity near the wave injection region. The observations are unique in that the ducted waves, seen over an array with unprecedented geomagnetic latitudinal range and positioning along a magnetic meridian (a condition that provides the most efficient ducting), have rarely been measured before.
机译：定义良好的ULF Pc 1地磁脉动同时,从地面数组五早上探察线圈磁力计南极洲的部门在3月23日,2007年。分布在一个非常广泛的范围地磁纬度(-62°- -87°,跨越~大约在2920公里地理位置)磁子午线,数组显示两极Pc 1波在电离层传播的波导。因素~ 8至20 dB / 1000公里极化变化从左到感觉右手海浪导管向极。然而,一个复杂的偏振模式(例如,椭圆率的变化和主要的轴角)看到地面上,这可能归因于数组被接近波注入区域事件的叠加效应海浪和管道中的波是主导。卫星显示横向联合和近线性偏振电脑1 ULF波高度的管道层(~ 350公里)有限的纬度的程度(-53°- -61°ILAT)。极化分析使用地面数据支持的想法冠军波注入区域附近的波活动。用管道输送的观察是独一无二的波,在以前所未有的数组地磁纬度的范围和定位沿着磁子午线(条件提供最有效的管道),很少被测量过。

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