Satellite bidirectional time frequency transmission method

A frequency transfer, two-way time technology, applied in transmission systems, radio transmission systems, communication between multiple stations, etc., to achieve the effect of improving accuracy, short-term frequency stability, and simple measurement process

Active Publication Date: 2018-06-08
BEIJING INST OF RADIO METROLOGY & MEASUREMENT
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Problems solved by technology

This method is also based on carrier phase observation parameters, but the method and measurement process

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  • Satellite bidirectional time frequency transmission method
  • Satellite bidirectional time frequency transmission method
  • Satellite bidirectional time frequency transmission method

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Embodiment Construction

[0029] The present invention is described in detail by the following examples. It is necessary to point out that this example is only used to further illustrate the present invention, and can not be interpreted as limiting the protection scope of the present invention. Those skilled in the art can according to the above invention Some non-essential improvements and adjustments have been made to the content. In the case of no conflict, the embodiments and the features in the embodiments of the present invention can be combined with each other.

[0030] The invention provides a satellite two-way time-frequency transmission method, comprising the following steps:

[0031] S1. Establish a satellite two-way time-frequency transfer link;

[0032] The first ground station and the second ground station respectively use mature dual-channel satellite two-way modulation and demodulation commercial equipment, and connect the 10MHz signal and 1PPS signal of the high-performance atomic clo...

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Abstract

The invention discloses a satellite bidirectional time frequency transmission method. The method comprises the following steps of S1. building a satellite bidirectional time frequency transmission link; S2. synchronizing a device timestamp; S3. acquiring four phase difference observation quantities; and S4. calculating a clock difference Tau(t)-Tau(t) of two stations. The satellite bidirectional time frequency transmission method with high precision and high stability can be performed even a user does not change the existing mature commercial device, has a simple measurement process, isparticularly suitable for metering remote time frequency transmission of high-performance atomic clocks like a hydrogen atomic clock and a caesium atomic clock in a laboratory, and can improve remotetime comparison precision and frequency short-term stability remarkably.

Description

technical field [0001] The invention relates to the technical field of time transfer, in particular to a satellite two-way time-frequency transfer method. Background technique [0002] The satellite two-way method of time-frequency transmission is currently the highest-precision time-frequency transmission method internationally recognized. It is widely used in international remote comparison of high-precision time-frequency values, and has an irreplaceable position in time-frequency measurement and traceability methods. The two-way time-frequency transmission of the satellite uses the signal spread-spectrum modulation technology to perform high-precision spread-spectrum modulation on the time-frequency information of the atomic clocks in the two places that needs to be compared and transmitted to form an uplink signal, and transmits the uplink modulated signal of the two places in real time through the satellite-ground link. At the same time, the two stations quickly captur...

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Application Information

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IPC IPC(8): H04B7/185H04B7/26H04J3/06
CPCH04B7/18528H04B7/2693H04J3/0661
Inventor 王海峰张升康王学运王宏博易航
Owner BEIJING INST OF RADIO METROLOGY & MEASUREMENT
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