低轨卫星轨道根数型广播星历预报  

Prediction of broadcast ephemeris for low Earth orbit satellites based on nonsingular elements

作　　者：黄昱 张益泽[1] 何丽娜[2] 王珩 HUANG Yu;ZHANG Yize;HE Lina;WANG Heng(Shanghai Astronomical Observatory,Chinese Academy of Sciences,Shanghai 200030,China;School of Earth Sciences and Engineering,Hohai University,Nanjing 211100,China;Shenyang Aerospace University,Shenyang 110036,China)

机构地区：[1]中国科学院上海天文台,上海200030 [2]河海大学地球科学与工程学院,南京211100 [3]沈阳航空航天大学,沈阳110136

出　　处：《导航定位学报》2024年第4期11-17,共7页Journal of Navigation and Positioning

摘　　要：基于第一类无奇点轨道根数的参数模型设计了17~23参数的8种模型,通过拟合参数外推得到预报轨道,研究拟合轨道与预报轨道间的关系,并探究预报精度的影响因素。实验结果表明:增加参数个数对拟合精度有明显提升。相对于全球定位系统(GPS)的16参数模型,20参数模型的预报精度提升26.2%,拟合精度提升71.2%。同时,使用蜂群(Swarm)卫星、重力反演和气候实验(GRACE)卫星、贾森2号卫星及通信、导航预测中断系统(C/NOFS)卫星的实测数据分析了轨道倾角、轨道高度、偏心率和拟合弧长对预报精度的影响。Based on the first type of singular point-free orbital elements,the paper proposed eight models with 17~23 parameters.By extrapolating the fitted parameters,the predicted orbits were obtained,and the relationship between predicted and fitted orbits was investigated,along with an exploration of factors influencing prediction accuracy.Experimental results indicated that increasing the number of parameters significantly improved fitting accuracy.In comparison to the 16-parameter model used for global positioning system(GPS),the 20-parameter model demonstrates a 26.2%enhancement in prediction accuracy and a 71.2%improvement in fitting accuracy.Additionally,the paper analyzed the impact of orbital inclination,orbital height,eccentricity,and fitted arc length on prediction accuracy.The study used precise ephemeries from Swarm,gravity recovery and climate experiment(GRACE),Jason-2,communications/navigation outage forecasting system(C/NOFS)satellites to validate the experimental conclusions.

关 键 词：低轨(LEO)卫星 广播星历 无奇点模型 轨道预报 

分 类 号：P228[天文地球—大地测量学与测量工程]