Analyzing Measured Evidence for Inducing Factors of SEU From In-Flight Data of NSSC-SPRECMI on OPUS CZ-4C

Abstract

This study investigates the dynamics of single-event upsets (SEUs) in space environments as detected by the National Space Science Center (NSSC)’s space particle radiation effect comprehensive measuring instrument (SPRECMI), which comprises linear energy transfer (LET) and proton detectors along with an SEU monitor. Positioned at an altitude of 1025 km and an inclination of 63.5°, the in-flight data reveal that inducing factors from the South Atlantic Anomaly (SAA) are predominant contributors to SEUs with 97.34% of SEUs occurring in this region despite its limited exposure time of 12.75% of the daily orbit. Our results not only underscore the dominant role of protons in influencing SEU rates but also validate the accuracy of SEU rate calculations derived from particle detection over long-term periods achieving a close agreement with a relative error (RE) of 7.01%. Nevertheless, the study finds limited daily-scale correlational dynamics between SEU rates and individual inducing factors, indicating the need for further research into optimal temporal scales for analyzing these relationships. Moreover, this study presents a systematic data processing and analysis case using comprehensive in-flight detection data and provides experimental evidence for the inducing factors of SEUs.