FY2D卫星与GOES卫星空间粒子观测结果的对比分析

风云二号D星(FY2D)搭载的空间粒子探测器可以观测10～300 MeV的质子和≥350 keV与≥2 MeV的电子.卫星在轨测试阶段，空间粒子探测器观测到了空间环境宁静期间地球同步轨道的电子昼夜周期变化的典型特征，并在卫星发射后的12月15日首次观测到了有代表性的 2级太阳质子事件(SEP)，观测到的较高能量质子比较低能量质子更快地恢复到平静时的状态.通过比较FY2D卫星与GOES卫星的探测结果，既显示了同步轨道区域不同位置高能电子通量扰动时间的一致性，也显示了高能电子通量具强烈的晨昏不对称性.通过对太阳质子事件和地磁平静时期该轨道空间高能粒子环境特征的分析和研究，并与GOES卫星同期的观测结果进行相关性分析，结果表明仪器确实具备了监测空间环境扰动和预警能力，探测结果可以用于研究地球同步轨道粒子空间分布、起源和传输等科学目的.

Comparison first results of space particle detector of FY2D with GOES

Space particle detector on board FengYun2D(FY2D) satellite has the capabilities to observe 10～300 MeV protons and ≥350 keV, ≥2 MeV electrons. During the first in-flight test phase, at geosynchronous orbit，energetic electrons showed the typical characteristics of noon-midnight asymmetries and a level 2 solar energetic proton events (SEP)was observed on Dec.15. After the peak of the SEP, the flux of protons with comparatively higher energy decreased more quickly. By comparison the results of FY2D and GOES with different local time at geosynchronous orbit, energetic electrons showed the properties of synchronous disturbance and intense dawn-dusk asymmetry. During the SEP and the quiet time, we analyzed the space particles environment at geosynchronous orbit and compared the correlation of contemporaneous results of FY2D with GOES. The evidence indicates that the instrument has the capabilities of inspecting and warning. And the results can be used to investigate the particles distributions at geosynchronous orbit or to research the particles transport and origin.