一种短波SID监测记录及其在太阳X射线耀斑观测中的应用

本文介绍了北京大学目前进行的电离层观测中的一种SID地面连续监测设备;着重讨论它在太阳耀斑观测方面的应用.通过对1982-1983年资料的分析表明,此方法对太阳耀斑活动十分敏感.所记录到的SID现象与世界上其他主要台站的报告基本上一致.文中介绍的几个实例说明有可能利用SID形态研究耀斑时的X射线强度的时间演变.统计结果还表明1-8A谱段的X射线峰值流量与SID扰动强度之间满足一个较简单的关系式,可据此对较大的太阳X射线耀斑的峰值流量做出估计. 

A Kind of Short Wave Band SID Records and Its Application in the Observation and Study of Solar X-ray Flares

Solar flares with enhanced X-ray emissions usually produce excess ionizations in the ionosphere and cause what generally known as sudden ionospheric disturbances (SID). It has long been established that much of information on the X-ray emission can be based on the observation of SID's. In recent 20 years, although direct observations of the X-ray radiation by satellites have made quantitative data available, SIDmeasurements are still a useful tool, because the method iscomparatively simple, easy to give a quick and continuous patrol.In this paper a sweep frequency device was described for the continuous monitoring of SID's. Emphasis was put to the application of the records in solar X-ray 'flare studies. Analysis of the data from 1982-1983 showed that the method is sensitive to solar flare with X-ray enhancement. Its records of SID's are in very good agreement with those reported by some other stations in the world with different methods except a few small sized disturbances. This shows a reliability of the data. Furthermore, most of the solar soft X-ray (1-8 à) events with a peak flux larger than about 10-3 erg·cm-2·sec-1, can be recognized from the records. The possibility of quantitative study of solar X-ray flux and its time curves with this kind of data were briefly discussed.