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A high-reliability time-system service device based on gbas

A technology of service equipment and reliability, applied in the field of satellite navigation, can solve the problems of large error and low timer accuracy, and achieve the effect of high accuracy, guaranteed accuracy, and guaranteed time accuracy.

Active Publication Date: 2020-10-09
TIANJIN 712 COMM & BROADCASTING CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of this, the present invention aims to propose a high-reliability time statistics service device based on GBAS, which solves the problem of low precision and large error of the DCP internal timer, and the device can provide GBAS ground equipment and airborne equipment at the same time. more accurate time

Method used

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  • A high-reliability time-system service device based on gbas
  • A high-reliability time-system service device based on gbas
  • A high-reliability time-system service device based on gbas

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Embodiment Construction

[0030] It should be noted that, in the case of no conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

[0031] In describing the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", " The orientations or positional relationships indicated by "vertical", "horizontal", "top", "bottom", "inner" and "outer" are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and Simplified descriptions, rather than indicating or implying that the device or element referred to must have a particular orientation, be constructed and operate in a particular orientation, and thus should not be construed as limiting the invention. In addition, the terms "first", "second", etc. are used for descriptive purposes only, and should not be understood ...

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PUM

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Abstract

The invention provides high-reliability timing system service equipment for a GBAS ground station. Reliable and continuous time frequency unified service can be provided for the GBAS ground station. High-reliability timing system service equipment is introduced into a GBAS ground station. A reference source selection logic is utilized to select one path of RR timing information to finish clock taming to replace a single-antenna clock taming mode. An internal clock is selected by using a high-performance constant-temperature crystal oscillator and atomic clock switching logic. If the RRs all work abnormally, the timing system service equipment uses the internal clock to precisely keep time, and if the RRs recover to work normally in the time keeping process, whether the time providing modeis switched or not is judged according to the time keeping switching logic, and the service is not interrupted while the time precision is guaranteed.

Description

technical field [0001] The invention belongs to the field of satellite navigation, in particular to a GBAS-based high-reliability time system service equipment. Background technique [0002] The Ground-Based Augmentation System (GBAS) is a satellite navigation ground-based local augmentation system that can be used for aircraft precision approach, landing and ground taxiing. On the basis of improving the accuracy of satellite navigation through differential positioning technology, the system adds a series of integrity monitoring algorithms to improve the system integrity, continuity, availability and other performance indicators. Its application can enable the corresponding user equipment configured in the covered airspace to obtain precise positioning and guidance services. [0003] The GBAS ground station generally includes a reference receiver (Reference Receiver, RR) and antenna, a data processing device (Data Communications Processor, DCP), a very-high frequency data b...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S19/43G01S19/25G01S19/20
CPCG01S19/20G01S19/256G01S19/43
Inventor 张建军王萌萌李延波刘金栋高丽哲刘文亮吕自鹏
Owner TIANJIN 712 COMM & BROADCASTING CO LTD