海南岛三亚哨声观测资料的初步分析

本文主要介绍1983年初在海南岛三亚观测哨声的部分结果.记录到大量哨声,其中包括短哨、多源哨和多路哨;约有10%的哨声下截频在0.8kc/s左右.经分析发现:(1)三亚哨声几乎全部出现在f₀F₂下降的过程中,哨声出现率的峰值在f₀f₂下降最快处,即电子浓度下降变化急剧处;(2)哨声活动和磁暴的关系与中高纬有所不同,存在明显的相反情况. 

A Preliminary Analysis on Whistler Observations at Sanya,Hainan, China

The main features of the whistlers, which were observed at Sanya (18.24°N, 109.5°E; Geomag. Lat. 7.04°N) early in 1983 are described. Agreat number of whistlers were recorded in the observations, including short whistlers, multisource whistlers, and mu-ltipath whistlers. Some of them (about 10%) have the low cutoff frequencies as low as nearly 0.8 kc/s. In addition to the conclusions given in papers 1,2], we further find: (1) the whistlers at Sanya almost always occured during f₀f₂ decreasing and the maximum values o'f whistler occurrence rate appeared just at the time when f₀f₂ decreased most fast, that is, when electron density changes most drastically. (2) the relation between whistler activities and magnetic storms at low latitudes have some differences with that at medium and high latitudes. Sometimes the correlations are reversed. To explain, all these, further observation and study are required.