Data quality analysis system and method of global satellite navigation system

A global satellite navigation and data quality technology, applied in satellite radio beacon positioning systems, radio wave measurement systems, measurement devices, etc., can solve the problems of lack of system-wide data quality analysis standards for single-point positioning capabilities, cost, etc.

Pending Publication Date: 2021-03-26
中国星网网络应用有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, currently commonly used GNSS data processing software such as Rtklib and Teqc do not have the capability of system-wide data quality analysis and standard single-point positioning. The present invention designs a GNSS data quality analysis system, which incorporates GPS, BDS, GLONASS, Galileo, QZSS, and IRNSS into the analysis range, and can also process BDS-3 data at the same time, and can intuitively display the processing results. Save time for technicians to troubleshoot problems

Method used

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  • Data quality analysis system and method of global satellite navigation system
  • Data quality analysis system and method of global satellite navigation system
  • Data quality analysis system and method of global satellite navigation system

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Experimental program
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Embodiment 1

[0050] In this embodiment, the coordinates and time of the satellite navigation system connected to the system of the present invention are unified, specifically including:

[0051] GS-84 is similar; the IRNSS system adopts the IRNSST time system, the starting time is 1999 / 8 / 22 00:00:00, which is 13s earlier than UTC, and the coordinate system is WGS-84;

[0052] The BDS system adopts the BDST time system, the starting time is UTC 2006 / 1 / 1 00:00:00, and the coordinate system is CGCS2000;

[0053] The GPS system adopts the GPST time system, the starting time is UTC 1980 / 1 / 6 00:00:00, and the coordinate system is WGS-84;

[0054] The GLONASS system adopts the GLOT time system, and the coordinate system is PZ90;

[0055] The Galileo system adopts the GST time system, the starting time is 1999 / 8 / 22 00:00:00 UTC, which is earlier than UTC13s, and the coordinate system is the GTRF coordinate system;

[0056] Before inputting the data quality analysis system of the present inventio...

Embodiment 2

[0059] This embodiment further describes the data processing module. The data processing module includes a visible satellite number calculation unit, a PDOP value calculation unit, a multipath calculation unit, a ranging noise unit calculation unit, and a signal-to-noise ratio extraction unit.

[0060] When performing multipath calculation, the multipath calculation formula is used to give the results of different frequency point combinations, which is convenient for comparing the multipath sizes of different frequency point combinations. The pseudorange multipath of frequency point i is expressed as:

[0061]

[0062] Among them, P i is the pseudorange observation value of frequency point i; L i is the carrier phase observation value of frequency point i; f i is the frequency of the carrier phase of frequency point i, B i is the superposition of phase ambiguity parameter, hardware delay and multipath effect, and i and j are two different frequency points, that is, i≠j. ...

Embodiment 3

[0065] Currently commonly used open source GNSS data processing software does not have the BDS-3B1C, B2a frequency point data processing capabilities, the present invention improves on this point. When standard single point positioning is performed in this embodiment, group delay correction should be performed on these two frequency points.

[0066] Correct the pseudo-range observations of the two frequency points. When the two frequency points are pilot components, there are:

[0067] p B2adc =p B2ap -c*T GDB2ap ;

[0068] p B1cpc =p B1Cp -c*T GDB1Cp ;

[0069] When two frequency points are data components, there are:

[0070] p B2adC =p B2ad -c*(T GDB2ad +ISC B2ad );

[0071] p B1CdC =p B1Cd -c*(T GDB1Cd +ISC B1Cd );

[0072] Among them, T GDB2ap is the delay difference of the B2a pilot component, T GDB1Cp is the delay difference of the B1C pilot component; ISC B2ad is the delay correction term of the B2a data component relative to the B2a pilot componen...

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Abstract

The invention belongs to the field of satellite navigation, and particularly relates to a data quality analysis system and method of a global satellite navigation system. The system comprises a data format conversion module, a data reading and storage module, a data processing module, a data statistical analysis module, a graphic visualization module, and a report output module. According to the system, BDS-3 data can be processed, and the functional defects of existing software are overcome; moreover, data quality analysis and standard single-point positioning can be carried out on a GPS, a GLONASS, a BDS and a Galileo, and data quality analysis and standard single-point positioning can also be carried out on the QZSS and the IRNSS of a regional satellite navigation system.

Description

technical field [0001] The invention belongs to the field of satellite navigation, in particular to a data quality analysis system and method of a global navigation satellite system (Global Navigation Satellite System). Background technique [0002] Under the general trend of developing commercial aerospace, low-orbit satellites have become a research hotspot, and the enhancement of low-orbit satellite navigation is a major direction for the future development of satellite navigation. The low-orbit satellite navigation enhancement is based on the GNSS system. At present, the GNSS navigation system is developing in the direction of multi-system, multi-frequency and multi-mode, including not only the GPS of the United States, the BDS of China, the GLONASS of Russia, and the Galileo global satellite navigation system of Europe; It is also developing its own regional satellite navigation system, such as Japan's quasi-zenith satellite navigation system QZSS, India's IRNSS; the qu...

Claims

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Application Information

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Patent Type & AuthorityApplications(China)
IPC IPC(8): G01S19/39G01S19/07
CPCG01S19/396G01S19/072
Inventor张亮吕增利李兴斌龚致远
Owner中国星网网络应用有限公司