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Satellite timing method based on wide area differential reinforcement

A technology of satellite timing and wide-area differential, which is applied to measuring devices, instruments, and radio wave measurement systems, can solve the problems of large geometric precision factor, difficult improvement of satellite real-time timing accuracy, and large random error of pseudo-range observations. The effect of improving timing accuracy, reducing construction cost and simplifying configuration

Inactive Publication Date: 2009-12-23
NAT TIME SERVICE CENT CHINESE ACAD OF SCI
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Problems solved by technology

[0003] The real-time requirements of satellite timing are high, and the current wide-area differential methods that meet the real-time requirements, such as the traditional wide-area differential methods such as WASS in the United States, use a single pseudo-range observation and a unified calculation method for satellite clocks and ephemeris. The distance observation has the disadvantage of large random error, but the unified calculation of star clock and ephemeris has a large geometric precision factor, and the real-time timing accuracy of satellites is not easy to improve

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  • Satellite timing method based on wide area differential reinforcement
  • Satellite timing method based on wide area differential reinforcement
  • Satellite timing method based on wide area differential reinforcement

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Embodiment Construction

[0026] Now in conjunction with embodiment, accompanying drawing, the present invention will be further described:

[0027] In this example: figure 1 The differential network monitoring system in the ground includes the main differential station (master station), which is strictly synchronized with the system time of the satellite navigation system, and multiple secondary differential stations (secondary stations), which are not required to be strictly synchronized with the system time during construction. The space segment consists of multiple satellites visible within the differential network.

[0028] figure 2 Medium M 1 Indicates the main differential station (master station), S k Indicates a navigation satellite, where S 1 Indicates the reference star, E k Indicates the broadcast ephemeris position of the navigation satellite, E 1 Indicates the broadcast ephemeris position of the reference star, E ik The corrected ephemeris position of the navigation satellite afte...

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Abstract

The invention relates to a satellite timing method based on wide area differential reinforcement, which is technically characterized in that each difference station carries out pseudo-range observation of a code phase and a carrier phase, and a main difference station and a satellite navigation system have synchronous time and can both measure a position of a code phase observation value and a carrier phase observation value of a pseudo range. The invention has the main effects of enhancing the accuracy of satellite navigation, and utilizing the method to cause the satellite navigation to achieve 1 nsec to 3 nsec and secondly, simplifying the configuration of a ground monitor system, and lowering the construction cost of a difference network.

Description

technical field [0001] The invention relates to a satellite timing method based on wide-area differential enhancement, which utilizes the differential technology of the satellite navigation system and the technology of the satellite timing method to achieve timing and improve the accuracy of satellite timing. Background technique [0002] Satellite timing is one of the three major functions of satellite navigation system, including timing, positioning and speed measurement. At present, satellite timing mainly depends on ground monitoring system measurement and is given in the satellite navigation message. The satellite timing accuracy given by the navigation message is about 20nsec. about. For users who require higher precision timing, this precision appears too coarse. Therefore, it is necessary to study methods that can further improve satellite timing accuracy. [0003] The real-time requirements of satellite timing are high, and the current wide-area differential metho...

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Application Information

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IPC IPC(8): G01S5/14
Inventor 蔡成林李孝辉吴海涛王文利常兴旺
Owner NAT TIME SERVICE CENT CHINESE ACAD OF SCI
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