Two-way satellite time transfer method based on carrier phase

A carrier phase, two-way time technology, applied in transmission monitoring, transmission system, digital transmission system, etc., can solve the problem that the accuracy is difficult to break through higher, and achieve the effect of ensuring effectiveness, improving time synchronization accuracy, and improving accuracy

Active Publication Date: 2012-07-04
NAT TIME SERVICE CENT CHINESE ACAD OF SCI
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Problems solved by technology

At present, TWSTFT uses a two-way time transfer method based on pseudo-range measurement. Due to t

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  • Two-way satellite time transfer method based on carrier phase
  • Two-way satellite time transfer method based on carrier phase
  • Two-way satellite time transfer method based on carrier phase

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Embodiment Construction

[0022] Now in conjunction with embodiment, accompanying drawing, the present invention will be further described:

[0023] The technical characteristics of the embodiment of the present invention are: firstly, it solves the technical bottleneck of the carrier phase in the application of the satellite two-way time transfer system - the consistency control of the code and the carrier phase at the satellite exit. Secondly, the carrier phase measurement is applied to the satellite two-way time transfer system. Compared with the code pseudo-range satellite two-way time transfer method, its accuracy is improved by 1 to 2 orders of magnitude. The implementation of this method is based on the following conditions: 1. a satellite; 2. at least two user stations, and the basebands of the two user stations can realize the calculation of the code and carrier phase adjustment amount, and the baseband control part transmits the baseband signal according to the calculation result The code and...

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Abstract

The invention relates to a two-way satellite time transfer method based on carrier phase, which solves the technical bottleneck, namely consistency control of satellite exit code and carrier phase, in the application of carrier phase in a two-way satellite time transfer system. In addition, the accuracy of the two-way satellite time transfer system is improved by 1 to 2 orders of magnitude in comparison with a code pseudorange two-way satellite time transfer method by using carrier phase measurement in the two-way satellite time transfer system. The method is implemented based on the following conditions: one satellite and at least two user stations, wherein the base band of the two user stations can calculate modulation amount of a code and the carrier phase, and a base band control part conducts real-time modulation of the code transmitting a base band signal and the carrier phase according to the calculation result, thereby ensuring signals transmitted by the base band to pass through an antenna, an upgoing space link and a repeater, and ensuring the consistency between the code of a downgoing navigation signal and the carrier phase at exit of the repeater.

Description

technical field [0001] The invention relates to a satellite two-way time transfer method based on carrier phase, which can improve the accuracy of the satellite two-way time transfer method by at least one order of magnitude. Background technique [0002] Since the first artificial satellite was launched in 1957, people have been exploring the possibility of using satellites for time synchronization. In 1962, the United States Naval Observatory (USNO) and the British Royal Physical Laboratory (NPL) used TELSTAR (the first active communication satellite) to conduct a transatlantic time comparison experiment. In 1965, USNO and Japan's Communication Research Laboratory (CRL) used RELAYII for a time comparison test across the Pacific Ocean, and the comparison accuracy was between 0.1us and 1.0us. [0003] In the 1980s, the United States built GPS, and the former Soviet Union built GLONASS (Global Navigation satellite system, GLONASS). Both of them have high-performance spacebo...

Claims

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Application Information

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IPC IPC(8): H04B7/185H04B17/00H04L7/033H04B17/309
Inventor 卢晓春荆文芳王雪邹德财成芳
Owner NAT TIME SERVICE CENT CHINESE ACAD OF SCI
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