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High precision time and frequency has become one of the core technologies in the modern world weapon system. Its main purpose is to provide a unified time benchmark for each subsystem in the system.
In the information age in which time is measured and planned in decimals and seconds, it is self-evident that accurate time and unity of time are important to win the victory of modern war. Whether it is the command of joint operations of the whole army, communication support of the whole army, weapon platform operation, weapon test, network informatization, identification of friend or foe of Navy and air force, military communication network / reconnaissance network / early warning radar network, cooperative operation of multi arms weapons, time and frequency measurement and testing, etc., all cannot do without the time service support of Beidou system. Beidou system has become an important foundation and guarantee for building an information-based army and winning an information-based war. It has become an organic part of military combat effectiveness and greatly improves combat effectiveness.
From the perspective of application requirements and prospects of Beidou time service in the field of communication, Beidou second generation time service products are also better than Beidou-1 in application scenarios and anti-interference ability, and Beidou second generation products can completely compete with GPS products. Especially for some important communication fields, the application of Beidou time service will enhance the security of the network in an all-round way. Compared with other countries' satellite navigation systems, this advantage can not be replaced.
From all aspects, Beidou system can fully meet the requirements of domestic communication network for high performance and high reliability of time-frequency reference signal. It is imperative to accelerate the application of Beidou time service in the field of communication.
Rubidium atomic frequency standard can achieve high performance index and adaptability to harsh environment in a small volume. It combines the long-term stability of satellite receiver output signal with the short-term stability of local clock to realize clock speed synchronization
The system has many monitoring functions, such as satellite traim monitoring, time-based satellite availability monitoring, time-based absolute phase difference monitoring, phase jump monitoring, local oscillator performance monitoring, output signal performance degradation monitoring and so on, so that the equipment has better reliability and availability
Modern closed-loop control time keeping theory and Kalman digital filtering technology are used to control and tame the internal high-precision rubidium clock of the aircraft by using the received Beidou high-precision time reference, so that the output 1PPS signal of the system is synchronized with the time reference of the satellite, and the output signal can maintain a stable value for a long time
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