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Satellite navigation and positioning observation value weighing method and device

A satellite navigation and observation value technology, applied in the field of global satellite navigation system positioning, can solve problems such as unsuitable polar changeable observation conditions, and achieve the effects of optimal position reference, easy method and improved stability.

Active Publication Date: 2018-11-16
PLA STRATEGIC SUPPORT FORCE INFORMATION ENG UNIV PLA SSF IEU
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Problems solved by technology

[0005] The purpose of the present invention is to provide a method and device for determining the weight of satellite navigation and positioning observation values, which are used to solve the problem that the GNSS navigation and positioning scheme in the prior art is not suitable for the changing observation conditions of polar regions

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  • Satellite navigation and positioning observation value weighing method and device
  • Satellite navigation and positioning observation value weighing method and device
  • Satellite navigation and positioning observation value weighing method and device

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Embodiment Construction

[0054] The specific embodiment of the present invention will be further described below in conjunction with accompanying drawing:

[0055] The invention provides a method for determining the weight of satellite navigation and positioning observation values, which is especially suitable for determining the weight of BDS satellite navigation and positioning observation values, such as figure 1 and figure 2 shown, including the following steps:

[0056] (1) Obtain the BDS satellite observations, obtain the observations residual matrix according to the observations error equation, and further determine the empirical value of the observations weight ratio according to the observations residual matrix;

[0057] (2) collect the pseudorange of BDS satellite and the observation quantity of carrier in real time, obtain the single epoch non-difference pseudorange noise variance equation, solve described single epoch non-difference pseudorange noise variance equation and obtain the vari...

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Abstract

The invention provides a satellite navigation and positioning observation value weighing method and device. A BDS satellite observation value and observation quantity residual after pre-adjustment areacquired, and a weight ratio of observation values of different track types of the BDS is determined; according to an original observation value, pseudo-range observation value noise of each satellite in the current epoch is solved in real time; and by using the observation value weight ratio and pseudo-range observation value variance, an observation value variance matrix is classified and solved in real time. In consideration of ionospheric disturbance, multipath effects and observation noise, an observation value with better quality is selected to participate in solution, the pseudo-rangeobservation value noise of each satellite in the current epoch is solved, convergence is accelerated, a real-time and reliable positioning result is obtained, and the solution precision is improved. In consideration of effective information in real-time data, the contribution of a different type of observation quantity in positioning and solution is clarified, the positioning stability is improved, the method is easy to extend, and better position reference is provided for GNSS real-time navigation positioning and atmospheric inversion application.

Description

technical field [0001] The invention belongs to the technical field of global satellite navigation system positioning, in particular to a method and device for determining the weight of satellite navigation positioning observation values. Background technique [0002] Weighting of BDS observations means that when using combined observations to solve BDS high-precision navigation and positioning, it is necessary to adopt a certain strategy to give the accuracy information of different constellation configurations and different observations, so as to assign weights to observations with different data quality. different weights, and determine the variance matrix of the observations. The quality of polar GNSS data is greatly affected by the observation environment, and there are large differences in data availability. The weighting method considering the quality of observations can determine the poles more reasonably and improve the stability and reliability of polar satellite ...

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Application Information

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IPC IPC(8): G01S19/42G01S19/43
CPCG01S19/426G01S19/43
Inventor 左宗陈明剑李万里周润杨李滢李俊毅李广云
Owner PLA STRATEGIC SUPPORT FORCE INFORMATION ENG UNIV PLA SSF IEU
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