A.V.H.F. propagation phenomenon associated with aurora
A.V.H.F. propagation phenomenon associated with aurora
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AVH.F.
DOI：
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发表时间：
1951
期刊：
影响因子：
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通讯作者：
R. Moore
中科院分区：
文献类型：
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作者：
R. Moore
本文叙述了在极光显示期间，业余无线电爱好者在28 ~ 148兆赫兹频率上观测到的异常传播。这种现象在1939年首次与极光联系在一起，其特征如下：
(1)一个非常高的衰落率，使语音调制变得难以理解
(2)定向天线在指向北方（朝向极光）时效果最佳
(3)缺乏跳跃效应
(4)极化变化不大
将无线电现象的报告与极光的目视观测相比较表明，这种效应在地磁纬度56°以下的极光显示中最为常见，尽管高纬度地区缺乏业余观测站可能会影响这些数据。在获得更精确的衰落数据之前，推迟发展一个合适的理论。
Anomalous propagation observed by radio amateurs at frequencies of 28 to 148 Mc during displays of aurora polaris is described. This phenomenon, first correlated with aurora in 1939, is characterized by the following features:
(1) A very high fading rate, such that voice modulation is rendered unintelligible
(2) Directional antennas give best results when pointed north (toward the aurora)
(3) Lack of skip effect
(4) Little change in polarization
Comparison of reports of the radio phenomenon with visual observations of aurora indicates this effect is most common with auroral displays extending below 56° geomagnetic latitude, although the lack of amateur stations at high latitudes may influence these data. Until more precise fading data are available, development of a suitable theory is deferred.