CAJ | 학술논문

为实现广域空基伪卫星网络的精确共视授时，提出了网内传递共视授时方法；为进一步削弱对流层延迟误差的影响，提出了卫星共视选星策略；通过分析 SIN/BD 组合导航系统定位误差的统计特性，在揭示授时误差与组合导航系统定位误差之间数学关系的基础上，又提出采用整网平均法用以减少动态平台定位误差的影响。仿真结果表明：传递共视方法能很好地完成大区域网络的授时，有选星策略比无选星策略的对流层延迟减少约80%，运用整网平均的方法能实现优于0.3 ns的高精度共视授时，所提方法能够大幅度提高动态共视授时的精度。
위실현엄역공기위위성망락적정학공시수시，제출료망내전체공시수시방법；위진일보삭약대류층연지오차적영향，제출료위성공시선성책략；통과분석 SIN/BD 조합도항계통정위오차적통계특성，재게시수시오차여조합도항계통정위오차지간수학관계적기출상，우제출채용정망평균법용이감소동태평태정위오차적영향。방진결과표명：전체공시방법능흔호지완성대구역망락적수시，유선성책략비무선성책략적대류층연지감소약80%，운용정망평균적방법능실현우우0.3 ns적고정도공시수시，소제방법능구대폭도제고동태공시수시적정도。
To achieve high precision time service of wide area pseudo-satellite network, this article proposed the method of transmission common-view time service inside the network, analyzed the errors of the process of common-view time service, put forward the method of satellite common-view selection in order to further reduced the effect of troposphere delay, after that analyzed the distribution of position error of the SIN/BD integrated navigation system, then raised the net average to eliminate the effect of position error, improved the precision of time service of pseudo-satellite network significantly. Simulation result showed that the method of transmission common-view can do a good job to finish the large-scale network time service; common-view selection reduced almost 80% of troposphere delay than none;and net average can achieve the service precision of common-view time less than 0.3 ns, the method that this article proposed can improve the precision of dynamic time service of pseudo-satellite network significantly.