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单粒子翻转(SEU)是空间仪器受辐射环境影响而产生的最常见的故障之一,而太阳活动是影响空间仪器所在的空间辐射环境的重要因素,为了分析太阳活动对空间仪器单粒子翻转的影响,总结了第24太阳活动周期中,2010年3月~2015年4月,来自3个不同低轨道面上的48个在轨仪器的单粒子翻转情况与太阳活动变化的关系。通过统计分析单粒子翻转数量随时间的变化规律以及对单粒子翻转与太阳黑子数量变化的相关性分析,发现单粒子翻转与太阳活动呈负相关,在太阳活跃期,单粒子翻转数变化曲线在延迟一段时间后与太阳黑子数变化曲线有较强的相关性。这一发现对空间仪器单粒子翻转的预测有重要参考价值,通过对太阳活动变化的观测评估预测特定时段内仪器在空间环境中的可靠性,从而通过设计应对的抗辐射加固方案来规避空间辐射风险。
Single event flip (SEU) is one of the most common failures of space instruments affected by the radiation environment. Solar activity is an important factor that affects space radiation environment where space instruments are located. In order to analyze the effect of solar activity on the single-particle flip of space instruments Influence, summed up the 24th solar activity cycle, March 2010 ~ April 2015, from 48 different on the orbit of the 48 instruments in the single-particle inversion and the relationship between changes in solar activity. Through the statistical analysis of the law of the number of single-particle flipping over time and the correlation between single-particle flipping and the change of the number of sunspots, it was found that the single-particle flipping was negatively correlated with the solar activity. During the solar active phase, After a period of delay and sunspot number curve has a strong correlation. This finding is of great value to the prediction of single-particle flipping in space instruments. By observing the changes of solar activity, the reliability of the instrument in the space environment can be predicted and evaluated in order to avoid space radiation by designing a radiation-proof reinforcement scheme risk.