CAJ | 학술논문

对中俄联合火星星-星电离层掩星技术体制进行了分析和介绍,采用三维射线追踪方法对电离层掩星事件的电波观测值进行了模拟计算,并利用模拟的掩星观测数据进行了电子密度廓线反演,结果说明仿真算法可靠.利用仿真的方法,分别对掩星电波相位观测误差和卫星轨道误差等带来的反演误差进行了个例计算和分析,结果得到:5%周的相位测量误差对白天电离层掩星探测结果的影响可以忽略,而夜间电子密度测量的绝对误差小于4×108 m-3;卫星轨道误差对掩星的主要影响是导致电离层高度抬升或下降.结果表明,中俄联合火星电离层掩星探测技术体制先进,可望获得高精度的电子密度廓线;其技术体制也可以用于月球电离层环境的探测.
대중아연합화성성-성전리층엄성기술체제진행료분석화개소,채용삼유사선추종방법대전리층엄성사건적전파관측치진행료모의계산,병이용모의적엄성관측수거진행료전자밀도곽선반연,결과설명방진산법가고.이용방진적방법,분별대엄성전파상위관측오차화위성궤도오차등대래적반연오차진행료개례계산화분석,결과득도:5%주적상위측량오차대백천전리층엄성탐측결과적영향가이홀략,이야간전자밀도측량적절대오차소우4×108 m-3;위성궤도오차대엄성적주요영향시도치전리층고도태승혹하강.결과표명,중아연합화성전리층엄성탐측기술체제선진,가망획득고정도적전자밀도곽선;기기술체제야가이용우월구전리층배경적탐측.
The Mars ionosphere radio occultation experiment between the Chinese YH-1 spacecraft and the Russian Phobos-Grunt spacecraft orbiting Mars will be the first satellite to satellite radio occultation experiment in history, which will achieve high quality iono-spheric electron density profiles. The technique used in this experiment is analyzed and introduced. Simulations of the radio occultation have been completed. Forward calculations of the radio wave observable for the ionospheric radio occultation events have been done with the 3D ray tracing method and a simple Chapman ionosphere background model. The backward inversion with the forward calculated radio occultation observation data gives re-liable and consistent ionospheric electron density profiles, which show the reliability of the simulation algorithms. With the simulation method, the effects of errors from the radio signal phase measurement and the orbit determination of the satellite on the inversion are analyzed in cases. Results show that phase errors of 5% circle have a negligible effect on the daytime ionosphere radio occultation, and lead to an absolute error of less than 4×108m3 for nighttime electron density profiles. Orbit errors of the satellite mainly pose a systematic rising or descending to the ionosphere height. The above results show that Sino-Russian cooperative Mars ionosphere radio occultation experiments is expected to achieve high qual-ity Mars ionosphere profiles. Their technique regime can be used for the lunar ionosphere exploring.