空间科学学报2025，Vol.45Issue(3)：717-728,12.DOI:10.11728/cjss2025.03.2024-0060
TLE轨道反演大气密度精度评估
Accuracy Assessment of the TLE-derived Orbital Atmospheric Densities
摘要
Abstract
In this research,we derived TLE-based atmospheric densities along CHAMP and GRACE-A orbits,and the density errors were calculated based on the high-accuracy accelerometer densities,em-pirical models errors including NRLMSISE-00,JB2008 and MSIS2.0 were also estimated for comparison.Improvement ratios,which defined as the percentage of TLE density errors smaller than that of empiri-cal models,were given in the subsequent contents,and lay a theoretical foundation for the accuracy and application of the TLE-derived densities.TLE data ranged from 2002 to 2017,and two different kinds of densities,including TLE-averaged and TLE-calibrated densities,were derived.The former ones have a temporal resolution of 3 days,and were independent of the empirical models;the latter ones were cali-brated values which relies on the empirical models.Results indicate that the TLE-averaged densities have a general average error smaller than 5%,and a standard deviation no bigger than 8%;the TLE-cali-brated densities have the minimum errors during geomagnetic quiet conditions,with the improvement ratios bigger than 80%.关键词
TLE反演密度/误差改善率/经验大气模式Key words
TLE-derived densities/Improvement ratios/Empirical atmospheric models分类
天文与地球科学引用本文复制引用
任廷领,罗冰显,苗娟,王荣兰,王昕,刘四清..TLE轨道反演大气密度精度评估[J].空间科学学报,2025,45(3):717-728,12.基金项目
中国科学院国防科技重点实验室基金(CXJJ-22S031)和中国科学院国家空间科学中心攀登项目(E1PD40017S)共同资助 （CXJJ-22S031）
