空间科学学报2025，Vol.45Issue(1)：113-124,12.DOI:10.11728/cjss2025.01.2024-0023
基于风云三号E星探测的黄昏时热层大气成分比值季节转换研究
Seasonal Transition Study of Thermospheric Atmospheric Composition Ratios at Twilight Based on Fengyun-3E Satellite Detection
摘要
Abstract
Two Fengyun-3 satellites are equipped with Ionospheric Photometers capable of detecting the integrated radiant flux of the OI 135.6 nm and N2 LBH band airglow emissions,from which the ra-tio(referred to as the 135.6/LBH ratio)is derived.Among them,the Fengyun-3E satellite,the second generation of near-polar sun-synchronous orbit satellites,provides airglow observations during dawn-dusk orbits.The 135.6/LBH ratio is typically proportional to the thermospheric atmospheric composition ra-tio of[O]/[N2],reflecting variations in this ratio,which is a significant parameter influencing changes in ionospheric electron density.This paper collects data from Fengyun-3E satellite in the past two years to analyze the seasonal conversion patterns of 135.6/LBH ratio and corresponding parameters in mid to low latitudes.The results showed that the seasonal variation of OI 135.6 nm and N2 LBH band radiation in-tensity was mainly in winter and summer,with rapid changes in spring and autumn,and this change varies with latitude.The 135.6/LBH ratio also shows a rapid transition in spring and autumn,but its peak and valley periods are different from the aforementioned two radiation intensities.The mid lati-tude region shows a seasonal characteristic of high in winter and low in summer,while the opposite is true near the equator,showing a semiannual variation cycle.The study also found that there is asymme-try in the seasonal transition of the 135.6/LBH ratio,which is significantly influenced by latitude and hemisphere.These results demonstrate that the Fengyun satellite ionospheric photometer has good per-formance in detecting seasonal,latitudinal,and hemispheric variations in the composition ratio of the thermosphere atmosphere,providing important basis for research,modeling,and space weather forecast-ing of the ionospheric thermosphere.关键词
风云三号卫星/气辉/热层/季节变化Key words
Fengyun-3 satellite/Airglow/Thermosphere/Seasonal changes分类
地球科学引用本文复制引用
石正,付利平,江芳,毛田..基于风云三号E星探测的黄昏时热层大气成分比值季节转换研究[J].空间科学学报,2025,45(1):113-124,12.基金项目
国家自然科学基金项目(4187040455)和国家重点研发计划项目(2022YFF0503901)共同资助 （4187040455）
