低纬地区TEC观测的初步分析

1985年6、7月间在低纬地区进行了TEC观测。发现赤道异常的北峰在广州江门一带,峰的位置有波动,低纬地区本地产生的声重波周期低于20—48分钟且随纬度而异;极地产生的大尺度声重波可以传播到广州、香港一带,难于传到海南岛;低纬地区的不均匀结构的出现,集中在2000—0400之间,其尺度不大,漂移没有明显的东向优势。本文还给出了由视速求真实速度的方法,在接近太阳活动低年的1985年夏季仅在三亚看到电离层汽泡。 

A Preliminary Analysis of TEC Observed at Low Latitude Area

An observation of total electron content (TEC) was made in June and July, 1985 at a low latitude area. It is found that the northern crest of equatorial anomaly is somewhat around Guangzhou and Jiangmen with a osscilation to and fro around that position. The observed periods of gravity waves locally produced are less than 20--48 minutes and vary with latitudes. The large scale gravity waves generated in polar region can propagate to Guangzhou, but seldom to Hainan island. Irregularities appear mainly from 20-04 LT and sizes are not large. No dominant eastward drift is observed. Since the minimum of solar activity is approaching bubbles appeared only at Sanya in summer.