CAJ | 학술논문

电离层闪烁是影响卫星导航系统定位性能的重要因素之一。该文介绍了在电离层闪烁的研究中，表征幅度闪烁强度的S4指数。建立电离层闪烁对信号载噪比的影响模型，得到了不同强度的幅度闪烁导致GPS接收机跟踪环路失锁的概率情况。最后分析出，随着载噪比的降低和电离层闪烁强度的增大，接收机跟踪环路的失锁概率也就越大。
전리층섬삭시영향위성도항계통정위성능적중요인소지일。해문개소료재전리층섬삭적연구중，표정폭도섬삭강도적S4지수。건립전리층섬삭대신호재조비적영향모형，득도료불동강도적폭도섬삭도치GPS접수궤근종배로실쇄적개솔정황。최후분석출，수착재조비적강저화전리층섬삭강도적증대，접수궤근종배로적실쇄개솔야취월대。
The ionospheric scintillation which affects the positioning performance of the satellite navigation system is important factor. The paper introduces the S4 index which can give the strength of the amplitude fading. The paper establishes the model of the fluctuation of the c/no by the relationship between Ionospheric scintillation and the c/no. It gets the probability of the GPS receiver tracking loops losing lock in the influence of Ionospheric scintillation. Analysis results show that with the lower c/no and ionospheric scintillation intensity increase the probability of the receiver tracking loops losing lock is greater.