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A WPT system and method for wide-area accurate timing

An accurate and wide-area technology, applied in the field of WPT system, can solve the problems of poor real-time performance, time transfer technology system has not been established, and cannot meet real-time accurate time transfer, etc., and achieve low-cost effects

Active Publication Date: 2020-08-11
BEIHANG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The main problem of the current PPP technology is that data products need to be processed afterwards, and the real-time performance is poor
Since IGS precision products have a certain time delay (17-40 hours for fast products and about one week for final products), they cannot meet the needs of real-time accurate time transmission
On the other hand, GPS is the main high-precision time transfer technology in the world, and a wide-area real-time time transfer technology system based on Beidou has not yet been established.

Method used

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  • A WPT system and method for wide-area accurate timing
  • A WPT system and method for wide-area accurate timing
  • A WPT system and method for wide-area accurate timing

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Embodiment Construction

[0048] The present invention will be further described below in conjunction with the accompanying drawings and examples. It should be understood that the following examples are intended to facilitate the understanding of the present invention, and have no limiting effect on it. In the following embodiments, the Beidou signal is taken as an example for illustration.

[0049] Such as figure 1 Shown, wide-area accurate time service WPT method of the present invention comprises the following steps:

[0050] S1: Obtain time reference refined data products, including real-time precise satellite clock difference products, tropospheric delay products, and satellite-side FCB products. The acquisition steps include the following sub-steps:

[0051] S11: The server accesses the GNSS global observation data stream in real time through the real-time data stream integration software, and decodes, stores, synchronizes and forwards it in real time.

[0052] S12: Based on the IGS tracking st...

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Abstract

The invention discloses a wide-area precise timing system. The wide-area precise timing system is abbreviated with a WPT system and comprises a high-precision time product service platform, a time transfer system and a time synchronous receiver, wherein the synchronous receiver is used for acquiring public satellite signals such as pseudo-range data and broadcast ephemeris by a GNSS antenna, receiving a time reference refined data product from the high-precision time product service platform by the time transfer system and correcting local clock of the synchronous receiver by the time reference refined data product so that accurate synchronization is maintained with satellite-borne clock and a signal such as calibrated 1PSS is acquired and is finally output to an application party. By theWPT system, UTC and Beidou time can be rapidly traced, and time service with a wide-area range superior to 1nanosecond is provided.

Description

technical field [0001] The invention belongs to the field of Wide-area Precise Timing (WPT), and particularly relates to a WPT system and method. Background technique [0002] In the precise time service method of the satellite navigation system, with the improvement of the accuracy and timeliness of the IGS precise ephemeris and clock difference products, the all-in-view method (All-in-view) has become a precise time-frequency transmission technology superior to the CV method. And become an important means of international atomic time (TAI) calculation. Compared with the CV method, the AV method can improve the time transfer path, increase a large amount of data with a high viewing angle, and further improve the stability, reliability and completeness of the time transfer. When the AV method introduces the carrier phase observation value, it is called the PPP time transfer method. Diego et al. studied the time transfer performance of PPP by using the final precise satelli...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G04R20/02G04R20/04G04F5/14
CPCG04F5/14G04R20/02G04R20/04
Inventor 施闯楼益栋于佳亮郭文飞宋伟张东
Owner BEIHANG UNIV
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