Single-line time service and time keeping method based on global navigation satellite system (GNSS)

Abstract

The invention discloses a single-line time service and time keeping method based on a global navigation satellite system (GNSS). The method comprises the following steps of S1, receiving a satellite signal by a GNSS receiver; S2, performing down-conversion and A / D conversion on the satellite signal; S3, capturing, tracking and demodulating satellite signals to obtain original message information; S4, decoding to obtain a measured value and navigation message information of the satellite; S5, performing PVT calculation to obtain the position, speed and time information of the GNSS receiver; S6, performing time service and time keeping processing on the GNSS receiver; and S7, the GNSS receiver outputting positioning information and time service information. According to the method, GNSS navigation and time service functions are provided at the same time, navigation, positioning information and time service information of a GNSS receiver are outputted and broadcasted through the same serial port, so the equipment obtains accurate time information while obtaining the positioning information, and a serial port is saved for the equipment.

Description

technical field [0001] The invention relates to the application field of the global satellite navigation system, in particular to a single-line time service and timekeeping method based on the global satellite navigation system GNSS. Background technique [0002] With the development of satellite navigation industry, GNSS satellite navigation system has covered various global or regional navigation systems including GPS, Beidou, GLONASS, Galileo, QZSS, IRNSS and so on. Navigation, positioning and timing are the main research directions of GNSS applications. Among them, GNSS timing has a wide range of applications in various fields such as communications, electric power, transportation, finance, smart cities, aerospace, and national defense. [0003] GNSS timing is to use the GNSS receiver to receive more than 4 navigation satellite signals, and perform PVT calculations to obtain the position and clock error of the GNSS receiver according to the synchronized satellite measure...

AI Technical Summary

Problems solved by technology

[0006] The present invention solves the problem that the time when the GNSS receiver outputs position information and time information is delayed compared with the UTC standard time and the traditional 1PPS time service occupies a single serial port, and provides a single-line time service based on the global satellite navigation system GNSS and timing method, the method provides GNSS navigation and timing functions at the same time, the navigation, positioning information and timing information of the GNSS receiver are output and broadcast through the same serial port, so that the device can obtain accurate time information while obtaining positioning information , and save a serial port for the device

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