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Difference enhancement method based on aerostat reference station

An aerostat and reference station technology, applied in the field of satellite navigation, can solve the problems of large tropospheric delay difference, unsuitable airspace rover, and increased system construction cost, etc.

Inactive Publication Date: 2016-02-17
ACAD OF OPTO ELECTRONICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] There are three problems in the above: first, the tropospheric delay difference between the air rover and the ground reference station is large. In the case of a low satellite elevation angle, the tropospheric delay between the two stations is even more two orders of magnitude, and the difference cannot be effectively eliminated. Tropospheric errors, the traditional differential system is not suitable for airspace mobile stations; second, in deep mountainous areas, sea level, desert areas, and urban canyon areas, due to complex terrain and harsh climate, these areas are not suitable for laying ground-based reference stations, resulting in unavailability The traditional differential positioning method provides high-precision positioning services for mobile stations in this area; third, the coverage of ground-based reference stations is small. If differential services are to be provided for larger areas, a large number of reference stations need to be deployed, which increases the cost of system construction

Method used

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  • Difference enhancement method based on aerostat reference station
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  • Difference enhancement method based on aerostat reference station

Examples

Experimental program
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Embodiment 1

[0023] see figure 1 As shown, Embodiment 1 of the present invention provides a differential augmentation system based on the aerostat reference station 2, including the aerostat reference station 2, the rover station 3 and the GNSS1.

[0024] The above-mentioned GNSS1 broadcasts satellite navigation signals, and the above-mentioned aerostat base station 2 and the mobile station 3 receive the above-mentioned satellite navigation signals at the same time; The tropospheric delay value to the aerostat reference station 2 and the rover station 3; the aerostat reference station 2 broadcasts differential correction information, and the above differential correction information is the satellite navigation signal received by the aerostat reference station 2 and the troposphere Delay value: the mobile station 3 performs differential positioning calculation according to the received satellite navigation signal and the differential correction information to obtain position information.

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Embodiment 2

[0029] see figure 1 As shown, compared with Embodiment 1, Embodiment 2 of the present invention provides a differential augmentation system based on the aerostat reference station 2. Further, the above-mentioned mobile station 3 includes a second GNSS signal receiving module, an aerostat Reference station 2 information receiving module, second altimetry module, second tropospheric delay estimation module, differential positioning solution module. specifically,

[0030] The aforementioned GNSS1 broadcasts satellite navigation signals.

[0031] The aerostat reference station 2 includes a first GNSS signal receiving module, a differential correction information transmitting module, a first altimetry module and a first tropospheric delay estimation module.

[0032]Wherein, the above-mentioned first GNSS signal receiving module tracks and monitors GNSS to broadcast satellite navigation signals, obtains and sends continuous satellite navigation signals; the above-mentioned differe...

Embodiment 3

[0054] see figure 1 As shown, Embodiment 3 of the present invention provides a differential augmentation system based on the aerostat reference station 2, including the aerostat reference station 2, the rover station 3 and the GNSS1.

[0055] The aerostat reference station 2 includes a first GNSS signal receiving module, a differential correction information transmitting module, a first altimetry module and a first tropospheric delay estimation module.

[0056] The mobile station 3 includes a second GNSS signal receiving module, an aerostat reference station 2 information receiving module, a second altimetry module, a second tropospheric delay estimation module, and a differential positioning solution module.

[0057] GNSS navigation satellites broadcast satellite navigation signals, and the first and second GNSS receiving modules of the aerostat base station 2 and rover 3 receive satellite navigation signals at the same time, and the first and second measurement modules of th...

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Abstract

The invention discloses a difference enhancement method based on an aerostat reference station, and provides a difference enhancement system based on an aerostat reference station. The system comprises the aerostat reference station, a moving station and a GNSS. The GNSS broadcasts satellite navigation signals, and the aerostat reference station and the moving station receive the satellite navigation signals; the aerostat reference station and the moving station measure their respective heights from a sea level and measure troposphere delay values from a navigation satellite to an aerostat and the moving station in real time; the aerostat reference station broadcasts difference correction information which is the satellite signals received by the aerostat reference station and the measured troposphere delay values; and the flow station, according to the received satellite navigation signals and the difference correction information of the aerostat, carries out difference positioning solution so as to obtain position information. The difference enhancement system provided by the invention overcomes the disadvantages existing in a conventional foundation reference station, employs troposphere corrective difference positioning, and solves the defects of small coverage scope, lack of difference reference stations in seas, deserts and remote mountains and large errors caused by mere use of GNSS positioning in a conventional foundation difference method.

Description

【Technical field】 [0001] The invention relates to the technical field of satellite navigation, in particular to a differential enhancement system and method based on an aerostat reference station. 【Background technique】 [0002] As the application of satellite navigation becomes more and more extensive, relying solely on GNSS (Global Navigation Satellite System, Global Navigation Satellite System) can no longer meet people's demand for high-precision applications. [0003] In order to improve the positioning accuracy during navigation and positioning, reducing the measurement error in the satellite navigation signal is one of the feasible measures, and differential GNSS is a widely used and effective method to reduce or even eliminate the measurement error. The traditional ground-based local area differential system chooses to build the reference station on a tall building tens of meters above the ground, and provides differential services to rover users within the line of s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S19/07G01S19/41
CPCG01S19/07G01S19/41
Inventor 史政法陈潇巩应奎
Owner ACAD OF OPTO ELECTRONICS CHINESE ACAD OF SCI