A high-precision time-frequency source tamed to a time-frequency standard in real time

Abstract

The invention provides a high-precision time-frequency source capable of being tamed to a time-frequency standard in real time. The high-precision time-frequency source can obtain a first time-frequency clock difference sequence generated by a reference side and a global navigation satellite system (GNSS) remotely and in almost real time, and comprises a tamed side; the reference side generates N time-frequency signals of a to-be-calibrated clock; according to the N time-frequency signals and a satellite signal, a second time-frequency clock difference sequence is generated; according to the first time-frequency clock difference sequence and the second time-frequency clock difference sequence, a third time-frequency clock difference sequence between N time-frequency signals of a reference time-frequency source and the N time-frequency signals of the to-be-calibrated clock is obtained; according to the third time-frequency clock difference sequence, a relative frequency difference sequence is computed and acquired; and through the third time-frequency clock difference sequence and the corresponding relative frequency difference sequence, the to-be-calibrated clock is monitored and calibrated. The high-precision time-frequency source capable of being tamed to the time-frequency standard in real time can easily trace time performance and frequency performance of the reference time-frequency source (generally, the time-frequency standard, including a national time-frequency reference) in any laboratory, can trace the time and the frequency back to the International System of Units, and is relatively high in reliability, accuracy and stability.

Description

technical field [0001] The invention relates to the technical field of time-frequency calibration, in particular to a high-precision time-frequency source tamed to a time-frequency standard in real time. Background technique [0002] As an important basic physical quantity, time frequency plays an important role in national economy, national defense construction and basic scientific research. We live in the information age today, with the rapid development of the global telecommunication network, to ensure the normal operation of the telecommunication network requires the accuracy of the network signal transmission frequency to be higher than 1×10 -11 , otherwise the telecommunications network will be paralyzed. Therefore, atomic clocks must be used in network applications, and these atomic clocks need to be synchronized with high-precision time-frequency transfer. [0003] Time-frequency transfer has always been a research hotspot. For a long time, people have used radio...

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Problems solved by technology

[0004] At present, time frequency is becoming more and more important in all walks of life. Many institutions need to use different levels of time frequency standards. However, in the domestic measurement field, only a few countries and industry measurement institutions have continuous operation time scales (time standards). This has resulted in the inability to transmit the time value to units without time standards, or the situation of illegal traceability to GPS, making my country's time and frequency traceability system incomplete and perfect; at the same time, although frequency standards are easier to implement, However, the cost of the atomic clock frequency standard currently used by some units is too high, and it is not suitable for mobile, and it is inconvenient to trace the source

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