Abstract
Unlike other satellite navigation systems such as GPS (Global Positioning System), the BeiDou satellite navigation system broadcasts RDSS (Radio Determination Satellite Service) and RNSS (Radio Navigation Satellite Service) signals simultaneously on its GEO (geostationary earth orbit) satellites and provides related navigation services. This paper studies the method of using the RDSS and RNSS signals of BeiDou to achieve accurate frequency and time transmission. We analyze the generation mechanism of RDSS signal and RNSS signal of BeiDou GEO satellite, establish a mathematical model of RDSS and RNSS signal frequency transfer, and derive an equation based on BeiDou’s RDSS and RNSS signals for accurate frequency and time transmission. We also verified the relevant performance of the method through computer simulation. The results show that the combination of RDSS and RNSS signals from the BeiDou satellite system provides a new solution for its application in precise time and frequency transmission. This method is different from other satellite navigation systems such as GPS and is unique to the BeiDou system, with high accuracy and low dependence on satellite orbit accuracy.
Highlights
China is currently developing its global satellite navigation system, that is, BeiDou Navigation Satellite System, with the abbreviation BeiDou system (BDS)
We found that the joint application of the Radio Determination Satellite Service (RDSS) and Radio Navigation Satellite Service (RNSS) signals of the BeiDou’s Geostationary earth orbit (GEO) satellite can realize a new precise time and frequency transfer method
Where PRDSS represents the multiple of the satellite C-S responder local oscillator signal and satellite local oscillator signal fo, and Ni represents the multiple of the satellite RNSS carrier signal and satellite local oscillator signal fo
Summary
China is currently developing its global satellite navigation system, that is, BeiDou Navigation Satellite System, with the abbreviation BDS. We found that the joint application of the RDSS and RNSS signals of the BeiDou’s GEO satellite can realize a new precise time and frequency transfer method. This method is different from the traditional GPS method. We propose a method of BeiDou’s satellite RDSS and RNSS joint precision time and frequency transmission This method is different from the traditional GPS CV method and uses BeiDou’s RDSS and RNSS signals jointly. It is based on the characteristics of BeiDou RDSS/RNSS signals in satellite common clock source and relevance of signal propagation paths. The user forwards the information to the MCS through the satellite (path 3 and path 4 of the RDSS signal)
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