摘要
导航星发射的载波信号在导航领域有着重要的应用,测量载波发射频率准确性对卫星转发系统实现高精度定位、测速、授时有着重要的意义。文章分析了影响载波发射频率的载波上行多普勒频率和转发器本征频率等因素,利用卫星转发系统地面站基带测量的载波频率减去发射载波的下行多普勒频移的方法,根据地面站基带测量码伪距时延得到发射载波的下行多普勒频移,由此测算卫星转发系统载波发射频率的准确性。实际测试结果表明,以C1频点为例,卫星转发系统载波发射频率准确性为3.5e-13。
The carrier signal transmitted by the navigation star has an important application in the navigation field. Measuring the accuracy of the carrier transmission frequency is of great significance for the high- precision positioning,speed measurement and timing of the transponder satellite navigation system. In this paper,the carrier uplink Doppler frequency and the eigenfrequency of the transponder affecting the carrier transmission frequency are analyzed. The satellite exit carrier frequency is obtained by subtracting the downlink Doppler frequency of the transmitting carrier from the carrier frequency measured by the base station of the ground- based satellite forwarding system. The ground station baseband measurement code pseudorange delay obtains the carrier downlink Doppler frequency,thereby measuring the accuracy of the carrier transmission frequency of the transponder satellite forwarding system. The actual test results show that,with the C1 frequency point as an example,the accuracy of the carrier transmission frequency of the forward-based satellite system is 3.5e-13.
作者
崔群超
荆文芳
CUI Qun-chao;JING Wen-fang(National Time Service Center,Chinese Academy of Sciences,Xi’an 710600,China;University of Chinese Academy of Sciences,Beijing 100049,China)
出处
《电子设计工程》
2019年第16期96-100,共5页
Electronic Design Engineering
基金
国家重大专项(Y913ZX1701)
关键词
卫星导航
载波频率
准确性
测量
satellite navigation
carrier frequency
accuracy
measurement
