CAJ | 학술논문

在导航卫星的卫星钟发生器中，按一定频度测量主备卫星钟之间相位差，并将该相位差值作为卫星钟的监测信息，通过无线通道下行发射。在提出的星载卫星钟长稳测试方法中，首先利用地面接收机解调卫星钟的监测信息，然后进行数据处理获得主备卫星钟之间的相位差样本值，最后通过计算得到卫星钟的长期稳定度特性参数。该方法克服了传统方法需要高精度地面时频参考和复杂测试设备的问题，实现了简单、快速，测量精度能满足测试要求。采用该方法对多个在轨导航卫星进行测试，测试结果与对应卫星钟发射前的地面测试结果一致，该测试方法能准确反映在轨导航卫星钟长期稳定度特性。
재도항위성적위성종발생기중，안일정빈도측량주비위성종지간상위차，병장해상위차치작위위성종적감측신식，통과무선통도하행발사。재제출적성재위성종장은측시방법중，수선이용지면접수궤해조위성종적감측신식，연후진행수거처리획득주비위성종지간적상위차양본치，최후통과계산득도위성종적장기은정도특성삼수。해방법극복료전통방법수요고정도지면시빈삼고화복잡측시설비적문제，실현료간단、쾌속，측량정도능만족측시요구。채용해방법대다개재궤도항위성진행측시，측시결과여대응위성종발사전적지면측시결과일치，해측시방법능준학반영재궤도항위성종장기은정도특성。
In satellite navigation satellite clock generator, the phase difference between the master and the slave satellite clocks is measured according to a certain frequency, and the phase difference is regarded as satellite clock monitoring information that is transmitted through a wireless downlink channel. For the proposed long stability test method of orbital satellite clock,satellite clock monitoring information is first demodulated by the ground the receiver; then, the sample values of the phase difference between the master and the slave satellite clock are finally obtained by data processing; the characteristic parameters of the long-term stability of the satellite clock can be finally calculated. The proposed method overcomes the problem of the traditional method requiring high-precision ground frequency reference and complex test equipment. The proposed method is simple and rapid, and the measurement accuracy meets the test requirements. Using the proposed method of multiple navigation satellite in-orbit testing, the test results agree with the results of ground tests before launch for the same satellite clock. The proposed method can accurately reflect the long-term stability characteristics of the navigation satellite orbital clock.