风云二号F星太阳X射线探测器在轨探测初步成果

发布时间：2017-12-31 05:17

本文关键词：风云二号F星太阳X射线探测器在轨探测初步成果　出处：《地球物理学报》2014年11期 　论文类型：期刊论文

【摘要】：风云二号系列卫星以自旋稳定方式工作于地球静止轨道,太阳X射线探测器是该系列卫星的重要有效载荷,监测太阳耀斑爆发过程,并对太阳质子事件等灾害性的空间天气事件进行预警.卫星自旋一周,该探测器完成一次全日面观测,记录太阳X射线的能谱与流量.2012年初,太阳活动进入第24周峰年,风云二号卫星太阳X射线探测器的在轨运行取得了良好的观测结果.相比于过去的太阳X射线探测器,风云二号F星的太阳X射线探测器应用了硅漂移探测(Silicon Drift Detector,SDD)技术,对GEO轨道海量的高能带电粒子采取了有效的屏蔽措施,可以对更"软"的X射线进行观测,能谱分辨率本领达到国际先进水平,对太阳耀斑的量化定级精度更高,在轨初步观测结果表明,精确的能谱探测能力可提高太阳质子事件预警能力,能道响应的时间特性比过去的探测数据更准确地反映了太阳耀斑的加热过程和带电粒子加速特性.本文介绍了风云二号F星太阳X射线探测器的设计及其发射前的标定试验结果,并且对发射后在轨运行获得的初步探测成果进行分析和讨论.
[Abstract]:The Fengyun 2 series of satellites work in geostationary orbit in a spin-stabilized manner. The solar X-ray detector is an important payload for the series satellites to monitor the process of solar flare burst. The satellite spins a week, the probe completes a full solar plane observation, records the solar X-ray energy spectrum and the flow rate in early 2012. Solar activity enters the peak of its 24th week, and good results have been obtained from the on-orbit operation of the Fengyun-2 solar X-ray detector, compared with the previous solar X-ray detector. The solar X-ray detector of Fengyun2F uses silicon Drift detector (SDD) technology. Effective shielding measures have been taken for the massive high-energy charged particles in the GEO orbit, which can be used to observe the more "soft" X-ray, and the energy spectrum resolution ability reaches the international advanced level. The accuracy of quantification of solar flares is higher than that of solar flares. The preliminary observation results in orbit show that accurate energy spectrum detection ability can improve the early warning ability of solar proton events. The time characteristics of the energy channel response reflect the heating process of solar flares and the acceleration characteristics of charged particles more accurately than the previous data. This paper introduces the design and pre-launch of the solar X-ray detector of Fengyun II F star. The result of calibration test. The preliminary detection results obtained after launch are analyzed and discussed.
【作者单位】：中国科学院国家空间科学中心;中国气象局国家卫星气象中心;
【基金】：国防科工局与国家财政部联合资助项目“风云二号卫星工程型号项目资金”资助
【分类号】：P182.2
【正文快照】： 斑级别,实时预警太阳质子事件.在太阳大气宁静时1引言期,X射线流量极低,当太阳耀斑爆发时,耀斑区突然释放大量的X射线,磁重联过程中大量高能带电耀斑是太阳突然释放巨大能量和物质的剧烈爆粒子被磁场加速并可能对外释放高能太阳质子.对发过程,可引发地磁扰动、电离层突发扰动

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