资源一号卫星星内粒子探测器与神舟二号X射线探测器对高能电子探测的比较分析

利用资源一号卫星和神舟二号留轨舱上搭载的高能粒子探测设备对2001年2～6月同一时段内的资料进行了对比分析. 神舟二号飞船X射线探测器的观测结果反映的空间高能电子的分布, 表明在400km的较低高度上, 地理纬度40°附近以及SAA地区也可以观测到数百keV的高能电子. 资源一号卫星的探测结果显示了在800km高度附近, 同一时段内若干兆电子伏特的高能电子的全球分布. 后者出现的最低地理纬度和相应的经度位置则和前者是一致的, 说明两个高度上高能粒子的分布仍然都受地磁场控制, 粒子主要来源于地球辐射带. 资源一号卫星高能粒子探测器的能挡与神舟二号飞船X射线探测器的能挡不同, 彼此可以较好地补充. 但由于神舟二号轨道倾角较低, 全面的对比也受到一定的局限, 在进一步深入分析现有资料的同时, 可以在本文基础上设计更好的联合探测方案.

A comparison between detections of energetic electron by ZY1/CBMC and SZ2/XD

From February to June in 2001, there are two instruments for energetic particle detections on board of ZY1 (CBERS 1) and SZ2 respectively. In this paper, data of energetic electrons from ZY 1/CBMC and SZ 2/XD were compared for this same period. The energetic electron data from SZ 2 by a X ray detector (XD) gives electron distribution at a height of 400 km with a declination of 42°, while Energetic Particle Detector in side the cabin of ZY 1 is on a polar orbit at a height of 800km, giving the global distribution of electrons of 0.5～2MeV . The results of the comparison showed that, although the height is different, the low est latitudes where the energetic electrons are observed and the longitudinal di stribution are almost the same. This indicates that down to an altitude around 4 00km, the energetic electrons are still controlled by geomagnetic field. This al so shows that a coordinated analysis of data from these two satellite series are very helpful for understanding the lower part of earth's radiation belts.