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RTK algorithm for correcting tropospheric empirical model by using real test meteorological parameters and application

An empirical model and meteorological parameter technology, applied in meteorology, ICT adaptation, measurement devices, etc., can solve the problems of reduced positioning accuracy and reliability, large tropospheric delay residuals, etc., to solve positioning difficulties and correct tropospheric delay errors , Guarantee the effect of engineering precision

Pending Publication Date: 2020-12-18
CHINA THREE GORGES PROJECTS DEV CO LTD +2
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Problems solved by technology

[0008] The existing RTK technology has greatly reduced positioning accuracy and reliability in the case of short baseline and large height difference. The core reason is that in this case, the tropospheric delay residual in the double-difference observation equation is too large to be ignored.

Method used

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  • RTK algorithm for correcting tropospheric empirical model by using real test meteorological parameters and application
  • RTK algorithm for correcting tropospheric empirical model by using real test meteorological parameters and application
  • RTK algorithm for correcting tropospheric empirical model by using real test meteorological parameters and application

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Embodiment

[0089] The application of the present invention to correct the tropospheric delay error under the short baseline and large height difference of a reference station is an embodiment of the present invention. The present invention is applied to the correction algorithm of the tropospheric delay error under the short baseline and large height difference of other reference stations. Has a guiding role.

[0090] A reference station is located at a hydropower station in the upper reaches of the Jinsha River at the junction of Luquan County in Yunnan Province and Huidong County in Sichuan Province. The maximum horizontal distance of the service area of ​​the reference station is within 3km, and the maximum height difference exceeds 600m. Most of the service areas and the reference station have a height difference of more than 100m, which are distributed on both sides of the river, which is in line with the actual environment of short baseline and large height difference.

[0091] Ste...

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Abstract

The invention discloses an RTK algorithm for correcting a tropospheric empirical model by using real test meteorological parameters. The method comprises the following steps: step 1, storing an observation value of a reference station and actually measured meteorological elements of the observation value in real time; 2, selecting a global troposphere empirical model, and calculating zenith troposphere delay; 3, establishing the relationship between evelation, a global empirical model ZTD and a meteorological elements ZTD; 4, correcting the global empirical model ZTD of the reference station and the moving station by using the correction model, and obtaining a reference station observation value correction amount by solving the difference between the two models; and 5, correcting the reference station observation value by utilizing the reference station observation value correction amount, broadcasting the corrected reference observation value to the moving station, and carrying out double-difference RTK calculation by the moving station to obtain a three-dimensional coordinate of the moving station. The method has the advantage that the RTK service positioning precision and reliability are improved. The invention further discloses a continuous operation base station service system suitable for the special environment.

Description

technical field [0001] The invention relates to the technical field of relative positioning of a global positioning navigation system, more specifically, it relates to an RTK algorithm and an application of an empirical model of the troposphere corrected by measured meteorological parameters. More specifically, it is an RTK algorithm that corrects the tropospheric empirical model based on measured meteorological parameters. The invention also discloses the application of the RTK algorithm for correcting the tropospheric empirical model of the measured meteorological parameters, that is, the continuous operation reference station service system suitable for special environments, wherein the special environment refers to the situation of short baseline and large height difference. Background technique [0002] Thanks to the rapid development of global positioning and navigation systems, the emergence of RTK (Real-time kinematic, real-time dynamic) carrier phase difference tech...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S19/44G01W1/10
CPCG01S19/44G01W1/10Y02A90/10
Inventor 姚宜斌於三大杨爱明张良马能武权录年张辛伍中华肖玉钢张锋马瑞许超钤张琦胡明贤义崇政李星袁乐先张燊
Owner CHINA THREE GORGES PROJECTS DEV CO LTD
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