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Satellite locating error processing method based on map matching

A satellite positioning and error processing technology, applied in the field of satellite positioning measurement, can solve the problems of low efficiency and low cost requirements of dedicated GPS differential stations, and achieve the effects of eliminating system errors, improving positioning accuracy, and reducing costs

Inactive Publication Date: 2003-11-12
第二炮兵工程学院对外技术服务部
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  • Summary
  • Abstract
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  • Claims
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AI Technical Summary

Problems solved by technology

For vehicle navigation and monitoring systems in small areas, there are fewer monitoring vehicles, low cost requirements, and low efficiency in establishing dedicated GPS differential stations, etc.

Method used

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  • Satellite locating error processing method based on map matching
  • Satellite locating error processing method based on map matching
  • Satellite locating error processing method based on map matching

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Embodiment Construction

[0016] The GPS navigation monitoring system based on the present invention is mainly composed of GPS navigation, a microprocessor, a CD-ROM driver and an LCD display. The specific implementation method is (combined with figure 2 , 3 ):

[0017] 1. Determine four positioning points A, B, C and D within the corresponding area (corresponding to the vector map). The principle of point selection is: the point must be an identification point on the map (such as geodetic reference point, road intersection, etc.), and at the same time it is an accurate point that we can actually measure, and it should be located on the edge of the map as much as possible;

[0018] 2. Use GPS to actually measure the selected four points to obtain measured data;

[0019] 3. Input the parameter data obtained in 1 and 2 into the model, and load the vector map;

[0020] 4. The microprocessor completes the initial calculation of the matching model, and saves the correction values ​​of the lateral devia...

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Abstract

GPS is utilized to measure the four points not arranged in same line within the location area to obtain the actual measured values, which are compared with the latitude and longitude values of the corresponding points on the vector map. Thus, the transverse and longitudinal deviations of the positioning accuracy are obtained. The correction is carried out to eliminate the GPS positioning system error and the manual error in making the vector map effectively. The method does not need the equipment of communication system to transfer the difference positioning information so as to reduce the intermedium steps and lower the cost, providing the features of fast speed, high accuracy and possessing the obvious economical and social benefit.

Description

technical field [0001] The invention belongs to the technical field of satellite positioning measurement, and relates to a satellite positioning error processing method based on map matching. Background technique [0002] The Global Satellite Positioning System (GPS) is a global, omnipotent (land, ocean, aviation and aerospace), all-weather advantaged navigation, positioning, timing, and speed measurement system developed by the U.S. military in the early 1970s in the "meridian satellite navigation and positioning" technology. , consists of three subsystems: space satellite positioning system, ground monitoring system and user receiving system. Has been widely used in many fields such as military and civilian. In developed countries, GPS technology has begun to be used in transportation and road engineering. The car navigation monitoring system is a new technology developed on the basis of GPS. It consists of GPS navigation, autonomous navigation, microprocessor, vehicle ...

Claims

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Application Information

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IPC IPC(8): G01S19/40G08G1/13
Inventor 刘光炳斌余志勇
Owner 第二炮兵工程学院对外技术服务部
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