A dynamic adaptive Beidou sub-meter level location service comprehensive coverage method

A dynamic self-adaptive and location-based service technology, applied to measuring devices, satellite radio beacon positioning systems, instruments, etc., can solve problems such as sudden changes in positioning accuracy, inability to provide real-time pseudo-ranges for users, and unfavorable user experience

Active Publication Date: 2020-10-09
自然资源部第三大地测量队
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Problems solved by technology

For areas or grids without base stations, none of the above methods have pseudorange corrections, and cannot provide real-time pseudorange differential services for users in this area, causing users to enter areas without base stations (or grids) from the effective coverage area of ​​base stations When , the positioning accuracy changes suddenly, which is not conducive to user experience

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  • A dynamic adaptive Beidou sub-meter level location service comprehensive coverage method
  • A dynamic adaptive Beidou sub-meter level location service comprehensive coverage method
  • A dynamic adaptive Beidou sub-meter level location service comprehensive coverage method

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Embodiment Construction

[0025] The present invention will be further described in detail below in conjunction with the accompanying drawings and examples. The following examples are explanations of the present invention and the present invention is not limited to the following examples.

[0026] Such as figure 1 As shown, a dynamic adaptive Beidou sub-meter level location service full coverage method of the present invention includes the following steps:

[0027] Step 1: Using the reference stations distributed in the area, calculate the pseudorange correction number of a single base station;

[0028] Calculate the pseudo-range corrections of all reference stations in the area, and calculate the pseudo-range corrections of the BDS (Beidou Satellite Navigation System) B1 frequency band and the pseudo-range corrections of the GPS L1 frequency band by using the accurate coordinates of the reference stations and the satellite positions calculated in real time ; According to needs, BDS dual-frequency pse...

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Abstract

The invention discloses a dynamically adaptive Beidou sub-meter location service comprehensive coverage method. The method comprises the steps that reference stations distributed in an area are used to calculate the pseudorange correction number of a single base station; the area is divided into several sub-areas; the pseudorange correction number of the center and four vertices of each sub-area is calculated; the gradient surface of the pseudorange correction number of the area is constructed; the change rate of the pseudorange correction number gradient of the area is analyzed; the pseudorange correction number of the uncovered area of the base station is estimated; whether the change rate of the pseudorange correction number gradient of two sub-areas is greater than 1 / 24000 is judged; the automatically adjusted sub-area division size is used to divide the area into a number of small areas; and the pseudorange correction number gradient value of the area is used as the pseudorange correction number of the sub-area and is sent to a user for positioning. According to the invention, the user is prevented from abrupt change of positioning accuracy during use, and sub-meter location service comprehensive coverage is realized.

Description

technical field [0001] The invention relates to a method for full coverage of location services, in particular to a method for full coverage of dynamic self-adaptive Beidou sub-meter level location services. Background technique [0002] At present, domestic Beidou pseudo-range differential positioning technology is mainly based on single base station differential and grid differential, but the service scope of this method is limited. For areas or grids without base stations, none of the above methods have pseudorange corrections, and cannot provide real-time pseudorange differential services for users in this area, causing users to enter areas without base stations (or grids) from the effective coverage area of ​​base stations When , the positioning accuracy changes suddenly, which is not conducive to user experience. Therefore, there is a need for a dynamic and adaptive full-coverage method of Beidou sub-meter-level location services to prevent users from mutating positio...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S19/37
CPCG01S19/37
Inventor 张晶晶胡可陈现春张熙王黎成兵谭斌张芯
Owner 自然资源部第三大地测量队
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