Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Beidou GEO satellite precise timing system and method based on directional antenna

A directional antenna and timing system technology, applied in the field of satellite timing, can solve the problems of difficulty in fixing carrier phase ambiguity, limited ability to resist multipath effects, low code pseudorange measurement accuracy, etc., so as to weaken multipath effects and reduce observation noise. , the effect of improving the signal-to-noise ratio

Inactive Publication Date: 2022-02-01
NAT TIME SERVICE CENT CHINESE ACAD OF SCI
View PDF10 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the BDS precise single-point positioning timing method can achieve higher-precision timing, it faces the problems that there are obvious discontinuous steps (sky jumps) at the junction of the sky and the sky in the clock error sequence, and it is difficult to fix the carrier phase ambiguity.
[0005] In addition, the above two methods both use anti-multipath omnidirectional antennas for observation. This type of antenna has small gain, limited ability to resist multipath effects, and low code pseudo-range measurement accuracy.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Beidou GEO satellite precise timing system and method based on directional antenna
  • Beidou GEO satellite precise timing system and method based on directional antenna
  • Beidou GEO satellite precise timing system and method based on directional antenna

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0039] The present invention will be described in further detail below in conjunction with specific examples, but the embodiments of the present invention are not limited thereto.

[0040] BeiDou Navigation Satellite System (BDS) has been officially put into operation, and time service is one of the three basic service functions of BDS. The Beidou system adopts the GEO / IGSO / MEO mixed constellation. Currently, there are 45 Beidou-2 (BDS-2) and Beidou-3 (BDS-3) satellites in orbit, including 8 GEO, 10 IGSO and 27 MEO. Among them, GEO satellites have the characteristics of "stationary" and are always visible to fixed stations on the ground. Compared with MEO satellites, which have invisible arcs every day, GEO satellites are more suitable for observation with directional antennas to provide continuous and stable precision timing services.

[0041] figure 1 It is a schematic diagram of the Beidou GEO satellite precision timing system based on the directional antenna provided by t...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a Beidou GEO satellite precise timing system based on a directional antenna, and the system comprises: a data acquisition unit, a data management unit and a data processing unit, wherein the data acquisition unit and the data processing unit are respectively in communication connection with the data management unit; specifically, the data acquisition unit is used for receiving GEO satellite signals by using a directional antenna, and a GNSS receiver acquires observation data after decoding and sends the observation data to the data management unit; the data management unit is used for receiving and storing the observation data; and the data processing unit is used for acquiring the observation data from the data management unit and resolving the clock difference of a receiver clock relative to the time of the Beidou satellite navigation system according to the observation data. The directional antenna is used for observation, so that the signal-to-noise ratio can be improved, the multipath effect and observation noise can be weakened, the code pseudo-range measurement precision is improved, the integer characteristic of carrier phase ambiguity can be recovered, and precise timing based on the Beidou GEO satellite carrier phase observed quantity is realized.

Description

technical field [0001] The invention belongs to the technical field of satellite timing, and in particular relates to a Beidou GEO satellite precision timing system and method based on a directional antenna. Background technique [0002] Time service is one of the basic service functions of BeiDou Navigation Satellite System (BDS). Usually, static timing users use anti-multipath omnidirectional antennas and high-performance GNSS receivers to make observations, so as to receive signals broadcast by all satellites within the visible range and achieve timing. [0003] In the prior art, timing methods mainly include a BDS one-way timing method and a BDS precise single-point positioning timing method. Among them, for the BDS one-way timing method, the user needs to receive more than 4 GNSS satellite signals at the same time, and use code pseudo-range observations, broadcast satellite orbits and clock differences to calculate the receiver clock and the clock relative to the BDS s...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): G01S19/44
CPCG01S19/44
Inventor 杨海彦杨旭海王海雪孙保琪韦沛张喆钦伟瑾
Owner NAT TIME SERVICE CENT CHINESE ACAD OF SCI
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products