PPP high precision positioning method based on dual-band GNSS smartphones

A smart phone and positioning method technology, which is applied in the field of high-precision navigation, can solve the problems of low positioning accuracy, lack, and instability of mobile phone terminals, and achieve the effects of easy promotion, strong stability, and low cost

Active Publication Date: 2019-07-26
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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Problems solved by technology

[0006] Therefore, there is a lack of a positioning method in the prior art that makes full use of the physical basis of dual-frequency GNSS smart phones to achieve high-precision positioning services and overcome the shortcomings of low and unstable positioning accuracy at the current mobile phone

Method used

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  • PPP high precision positioning method based on dual-band GNSS smartphones
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  • PPP high precision positioning method based on dual-band GNSS smartphones

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Embodiment Construction

[0032] In order to enable those skilled in the art to better understand the technical solutions of the present invention, the present invention will be further described in detail below in conjunction with specific embodiments.

[0033] The embodiment of the present invention provides a PPP high-precision positioning method based on a dual-frequency GNSS smart phone. The schematic diagram of the high-precision navigation hardware system for a dual-frequency GNSS smart phone is as follows figure 1 As shown, the flow chart of the method is as figure 2 shown, including:

[0034] S1. The dual-frequency GNSS smartphone collects GNSS broadcast ephemeris, GNSS preliminary positioning results, and dual-frequency observation values. The dual-frequency observation values ​​include dual-frequency pseudorange and carrier phase observation values.

[0035] Among them, the pseudorange and carrier phase observation equations are

[0036]

[0037]

[0038] Among them, g represents th...

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Abstract

The invention discloses a PPP high precision positioning method based on dual-band GNSS smartphones and relates to the technical field of high precision navigation.AGNSS satellite positioning system with accuracy higher than 10 m is neededfor supporting so that the method can be realized on the dual-band GNSS smartphones. According to the PPP high precision positioning method, through IGS/iGMASmessaging assistance, high precision positioning of the decimeter level or above can be achieved by using a PPP algorithm on GNSS original received data. Preliminary positioning results and original carrier dataprovided by the GNSS satellite positioning system are obtained by thesmartphones through a dual-frequency GNSS receiver, correction data of a precise orbit and a clock correction are achievedthrough mobile internet access IGS/ iGMAS system by the smartphones.High precision positioning results are calculated by conducting the PPP algorithm on the smartphones. According to the PPP high precision positioning method, the problem caused by low positioning accuracy of the smartphone now is solved, under the market situation in which the dual-frequency GNSS smartphones gradually become a trend, positioning accuracy of the smartphones is dramatically improved to build infrastructures for location-based service development and better meet high-precision positioning requirements in an era of 5G and internet of things technology.

Description

technical field [0001] The invention relates to the technical field of high-precision navigation, in particular to a PPP high-precision positioning method based on a dual-frequency GNSS smart phone. Background technique [0002] At present, GPS, Beidou and other satellite navigation technologies have been able to provide individuals with positioning services with an accuracy better than 10m. It is not enough to meet the needs of specific cities or higher precision navigation positioning. The frontiers and hotspots of real-time high-precision positioning mainly include precise single-point positioning technology and network RTK technology, which are also the main technical means of real-time high-precision dynamic positioning at present and in the future. [0003] From the current development of real-time high-precision positioning technology, there are mainly two real-time high-precision positioning service systems. One is to rely on the reference station system to provide...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S19/44G01S19/40
CPCG01S19/44G01S19/40
Inventor 康国华徐伟证张琪张文豪张晗周宏涛吴佳奇刘奇弦王强刘宗强
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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