X射线极光强度与亚暴指数AE的相关关系  

A relation between the auroral X-ray total intensity and the substorm index-AE

作　　者：赵亮[1] 涂传诒[2] 

机构地区：[1]北京大学地球物理学系,北京100871 [2]中国科学院空间天气学重点实验室,北京100081

出　　处：《地球物理学报》2005年第4期739-743,共5页Chinese Journal of Geophysics

基　　金：国家自然科学基金项目(40174045;40336053和重点项目40436015);国家重点基础研究项目(G2000078405)共同资助.

摘　　要：研究了Polar卫星的极区电离层X射线成像仪(PIXIE)得到的极光X射线成像强度AI(AuroralIntensity)与磁层亚暴指数的相关关系.本文发现,在所选取的1997年至2001年的部分数据中,从完整的X射线图像得到的极光X射线总强度和AE指数有很好的线性相关关系,在全部83组数据中有56.6%的数据的线性相关系数都在0.60以上(相关系数最大为0.97).所以本文认为极光X射线总强度可以作为新的磁层亚暴卫星实时监测指数.In this short report a new aurora intensity index (AI) is defined as the total X-ray intensity derived from the images obtained by the aurora X-ray camera of PIXIE on board the Polar satellite. We found a linear relationship between the magnetosphere sub-storm index (AE) and the new aurora intensity index (AI). We found that among the 83 data sets chosen from 1997 to 2001, 566% of which has the linear correlation coefficients larger than 060 (the maximum is 097). We suggest that the auroral X-ray intensity (AI) be a candidate of a new real-time index obtained from satellite observations for monitoring magnetosphere sub-storms.

关 键 词：极光 实时监测 极光X射线强度(AI) AE指数 线性相关 

分 类 号：P318[天文地球—固体地球物理学]