空间科学学报2011，Vol.31Issue(4)：459-466,8.
基于实时观测数据的大气密度模式修正
Atmospheric Density Calibration Using the Real-time Satellite Observation
摘要
Abstract
For low Earth satellites, thermospheric density models are widely used in orbit determination and prediction. However, typical models often show density errors of 15%-30% under normal condition and the errors may be much greater during unusually solar and geomagnetic period. Density errors can be translated into orbit errors and effect mission plan, re-entry operations and precise orbit determination. In this paper, on the basis of detected data of Shenzhou, a kind of model calibration is expected to be developed on real-time detected data. By analyzing and comparing the character of density error for the national atmosphere model NRLMSISE-00, a kind of average calibration method is developed for relative quiet geomagnetic field （Ap ≤ 30）. During the quiet geo- magnetic field, the errors of model at the same local time and latitude are considered approximately identical, so the error may be substituted by average error at the same station. The results of model are tested based on Shenzhou 4 data by two means and both are improved in accuracy. The errors of 20% decreased to 6% by real-time error calibration. The errors of one day in advance decreased to 7.8%, two days in advance decreased to 9.4% and three days in advance decreased to 10.5%.关键词
神舟探测/大气密度/模式修正Key words
Shenzhou detection/Atmospheric density/Model calibration分类
天文与地球科学引用本文复制引用
苗娟,刘四清,李志涛,秦国泰,唐歌实..基于实时观测数据的大气密度模式修正[J].空间科学学报,2011,31(4):459-466,8.基金项目
载人航天与深空探测飞行力学实验室开放基金项目资助 （）
