光电设备大气折射误差实时修正方法  

Real-time atmospheric refraction error correction method for optoelectronic equipment

作　　者：张逢贵 贾鹏德 董浩 ZHANG Fenggui;JIA Pengde;DONG Hao(Southwest China Institute of Electronic Technology,Chengdu 610036,China)

机构地区：[1]中国西南电子技术研究所,成都610036

出　　处：《重庆理工大学学报（自然科学）》2024年第11期179-184,共6页Journal of Chongqing University of Technology：Natural Science

基　　金：国家自然科学基金项目(62131005)。

摘　　要：航天发射测控时对光电设备大气折射实时误差修正普遍使用简化模型,仅利用地面测站的气象参数,修正误差较大;而高精度的大气折射事后修正算法利用分层气象数据计算不同高度折射率,难以满足实时计算要求。针对这种情况,提出一种基于高斯积分的大气折射实时修正方法,充分使用气象剖面数据,采用高斯积分法提升计算运行效率,只需一次数值积分即可得到修正量。研究结果表明:所提方法单次修正耗时在10 ms内,满足实时性要求,且精度明显优于现有简化修正模型,与事后迭代积分方法精度相当。With the rapid development of satellite internet technology,the world’s major space powers and commercial organizations are planning to build large-scale low-orbit constellations,including OneWeb and StarLink.It is predicted the number of satellites in orbit and the frequency of rocket launches will increase sharply,setting much higher requirements for rocket launch measurement tasks.The optoelectronic equipment,crucial in space target information measurement at the space launch site,directly determines the success of a rocket launch mission.Radio waves are susceptible to atmospheric refraction in the process of atmospheric propagation.Atmospheric refraction errors occur in the process of external measurement of data while optoelectronic equipment is employed.Currently,the atmospheric refraction correction method at the space launch site is generally divided into two categories:the ex-post precise correction model and the real-time empirical correction model.The ex-post precise correction model mainly refers to the hierarchical integration method and achieves high accuracy.However,it usually fails to meet the requirements of real-time tasks due to large amounts of iteration integration.The real-time empirical correction model is fast,but it causes certain deviation in the correction results due to the simplified calculation with empirical parameters.To improve the real-time measurement accuracy of optoelectronic equipment during rocket launches,we proposes a new atmospheric refraction correction model based on Gaussian integral.It obtains the tropospheric refractive index at different heights through the meteorological profile data collected by the radio wave refraction corrector.Then,the fitted calculation for initial coefficients of the target relative to the height of the station is conducted.Finally,the apparent distance of the rocket,the true height of the rocket,and the atmospheric refraction correction results of the range,elevation and velocity are calculated through just one integral.To further improve

关 键 词：光电设备 大气折射 误差修正 实时计算 

分 类 号：V556[航空宇航科学与技术—人机与环境工程] TN98[电子电信—信息与通信工程]