For the detection and repair of cycle-slip for un-differenced GNSS triple-frequency observations,current algorithms have difficulties in efficiency,stability and even some special cycle-slip combinati
Multipath is the main factor affecting the positioning accuracy degradation in the Time & Code Division-Orthogonal Frequency Division Multiplexing(TC-OFDM)system.There is no effective mitigation metho
Passive hydrogen maser(PHM)has the advantages of high frequency stability and low frequency drift.It has been widely used in the navigation system and frequency calibration.Atomic transition signal am
International time transfer experiment based on GPS-and BDS-precise point positioning(PPP)technique is carried out using final(ISC)and rapid(ISR)precise satellite clock products provided by iGMAS(inte
Each observation station in the VLBI has an independent hydrogen clock.In particular,on rare occasions the phase lock synthesizer loss phase lock on the signal from the hydrogen maser cavity resulting
As an important load of BDS,the performance of satellite-borne atomic clock directly affects the service level of navigation system.Based on the requirements of navigation system on atomic clocks in o
Analysing the mechanism of nonlinear variations in GPS stations coordinates time series is an effective way to improve the coordinates accuracy of GPS stations.The constellation design characteristic
A novel approximate analytical method is presented for calculating parameters of Whispering Gallery Mode(WGM)in a sapphire dielectric resonator(SDR).It is based on ray optics and wave theory.The frequ