CAJ | 학술논문

简要介绍了扩频测控系统中非相干扩频测距的原理，针对在轨飞行器非相干扩频应答机频率准确度难以准确测量的问题，提出了一种基于星地帧周期固定差统计的卫星时钟准确度的测量方法，编制了下行测量帧解析工具，对卫星实时下传的测量帧数据进行解算，并结合实测距离进行分析处理，推算出应答机实时频率准确度，一定程度上实现了对在轨飞行器时钟系统的健康诊断。
간요개소료확빈측공계통중비상간확빈측거적원리，침대재궤비행기비상간확빈응답궤빈솔준학도난이준학측량적문제，제출료일충기우성지정주기고정차통계적위성시종준학도적측량방법，편제료하행측량정해석공구，대위성실시하전적측량정수거진행해산，병결합실측거리진행분석처리，추산출응답궤실시빈솔준학도，일정정도상실현료대재궤비행기시종계통적건강진단。
The principle of noncoherent ranging in spread spectrum TT&C ( Telemetry, Tracking and Com-mand) system is briefly introduced. Since the frequency stability of on-orbit noncoherent spread spectrum transponder is difficult to obtain, a measurement method based on the statistics of fixed satellite-ground frame period error is proposed and related software tool is developed. By using this tool and analyzing the downlink measurement data frame and the measured range data, the frequency stability of the transponder can be deduced and to some extent, the health diagnosis of the transponder’s clock system can be realized.