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Adaptive precise time establishing method for navigation satellite inter-satellite link equipment

An inter-satellite link and navigation satellite technology, applied in the field of satellite communication and precision measurement, can solve problems such as whole-week ambiguity, and achieve the effect of avoiding zero-value calibration and complex broadband detection.

Active Publication Date: 2016-10-26
NAT UNIV OF DEFENSE TECH
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Problems solved by technology

In practice, the uncertainty of the phase measurement of the reference signal, the uncertainty of the 1PPS jump edge detection, and the uncertainty of the phase difference between the two will cause the whole circle to be blurred.

Method used

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  • Adaptive precise time establishing method for navigation satellite inter-satellite link equipment
  • Adaptive precise time establishing method for navigation satellite inter-satellite link equipment
  • Adaptive precise time establishing method for navigation satellite inter-satellite link equipment

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Embodiment Construction

[0023] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0024] The navigation satellite inter-satellite link equipment self-adaptive precise time establishment method of the present invention, its steps are:

[0025] S1: Full-second detection of 1PPS from the space-borne time-frequency unit;

[0026] S2: An analog reference clock signal is provided by the on-board time-frequency unit, and the phase is strictly consistent with 1PPS. The inter-satellite link device obtains the fine scale of the local clock by tracking and measuring the phase of the reference clock signal;

[0027] S3: Perform ambiguity processing on the local clock to generate a local time that is precisely synchronized with the satellite system time.

[0028] In the above-mentioned step S1, the process of whole second detection is: the inter-satellite link equipment adopts the working clock (the frequency is f w , the per...

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Abstract

The invention discloses an adaptive precise time establishing method for navigation satellite inter-satellite link equipment. The method comprises the steps of (S1) carrying out whole second detection on the 1PPS from a spaceborne time frequency unit, (S2) providing a path of analog reference clock signal by the spaceborne time frequency unit, maintaining strict phase consistence with 1PPS, wherein the inter-satellite link equipment obtains the fine scale of a local clock through the tracking measurement of a reference clock signal phase, (S3) carrying out ambiguity processing on the local clock, and generating a local time which is precisely synchronous with a satellite system time. The method has the advantages of a simple principle, easy realization, and the improvement of accuracy.

Description

technical field [0001] The invention mainly relates to the field of satellite communication and precision measurement, in particular to a method for establishing self-adaptive precise time of navigation satellite inter-satellite link equipment. Background technique [0002] The Global Navigation Satellite System (GNSS) can provide all-weather precise position and time information for any place in the earth and near-Earth space. In the global satellite navigation system, maintaining high satellite orbit determination accuracy and clock error determination accuracy is the key to ensure that the navigation receiving terminal obtains the positioning or timing accuracy required by the large system. [0003] The demand for inter-satellite ranging function for precise orbit determination and time synchronization of navigation satellites gave birth to the concept of navigation constellation inter-satellite link. Once the link is established between the navigation satellites through...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G04R20/02
CPCG04R20/02
Inventor 郭熙业杨俊周永彬陈建云孟志军胡梅刘长水
Owner NAT UNIV OF DEFENSE TECH
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