大气折射引起的卫星测控系统速度误差分析  

Analysis of velocity error of satellite TT&C system caused by atmospheric refraction

作　　者：孙方[1] 朱庆林[1] 刘琨[1] 王红光[1] 林乐科[1] SUN Fang;ZHU Qinglin;LIU Kun;WANG Hongguang;LIN Leke(China Research Institute of Radio wave Propagation,Qingdao 266107,China)

机构地区：[1]中国电波传播研究所,青岛266107

出　　处：《电波科学学报》2022年第5期810-816,共7页Chinese Journal of Radio Science

基　　金：院士工作室基金(A332103Y13,A172003Y01);自然科学基金(61971385)。

摘　　要：由于大气各高度层介电特性的不均匀性,无线电波沿地空链路传播时会产生折射效应,为卫星的定轨测控系统引来不同程度的折射误差.针对单频单站卫星系统的定轨方式,给出了基于多普勒频移测速原理的高精度速度误差修正算法,并与基于距离误差变化率原理的测速算法和实测数据进行了比较,验证了算法的准确性.利用修正算法分别仿真计算了大气折射时延效应和弯曲效应导致的速度误差;基于不同频段、不同轨道高度的卫星系统参数,比较分析了对流层、电离层折射效应造成的速度误差变化特性.分析结果可为当前地空链路的卫星测控系统提供准确的速度误差修正量参考,进而合理准确地评估大气折射对星载单频接收机测速误差的影响.Due to the non-uniformity of the dielectric characteristics of each altitude layer of the atmosphere,the refraction effect will be produced when the radio wave propagates along the earth-air link,which will lead to different degrees of refraction errors to the satellite TT&C system.Aiming at the orbit determination mode of single frequency and single station satellite system,a high-precision velocity error correction algorithm based on Doppler frequency shift velocity measurement principle is given,and compared with the velocity measurement algorithm based on phase path error change rate principle and measured data to verify the accuracy of the algorithm.The velocity refraction errors caused by delay effect and bending effect are simulated and calculated by using the modified algorithm.Based on the satellite system parameters of different frequency bands and different orbital heights,the variation characteristics of velocity error caused by tropospheric and ionospheric refraction are compared and analyzed.The analysis results can provide accurate velocity error correction reference for the current satellite TT&C system of earth-air link,and evaluate the influence of atmospheric refraction on the velocity measurement error of spaceborne single frequency receiver reasonably and accurately.

关 键 词：大气折射 电离层 卫星测控系统 多普勒频移 速度误差 

分 类 号：TN011.3[电子电信—物理电子学]