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Usable forcasting method for receiver autonomic excellent monitoring

A technology of integrity monitoring and prediction method, applied in the field of satellite navigation, can solve problems such as reducing the availability of RAIM, and achieve the effect of reducing the dependence on the number of visible satellites and spatial layout, wide application range, and reducing delays and cancellations

Inactive Publication Date: 2007-12-19
BEIHANG UNIV
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Problems solved by technology

The inventor found in the process of invention and creation that after the U.S. government decided to cancel SA in 2000, ionospheric delay became the largest error source for GPS satellite pseudo-range measurement, which is closely related to the elevation angle from the receiver to the satellite and the receiver position. Therefore, If the existing technology continues to be used, the pseudorange measurement error of the satellite can only be selected according to the largest pseudorange measurement error among visible satellites, which will reduce the actual RAIM availability

Method used

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  • Usable forcasting method for receiver autonomic excellent monitoring
  • Usable forcasting method for receiver autonomic excellent monitoring
  • Usable forcasting method for receiver autonomic excellent monitoring

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Embodiment Construction

[0026]As shown in Figure 1, it is a flow chart of a specific embodiment of the availability prediction method for receiver autonomous integrity monitoring of the present invention. The method is a weighted RAIM availability prediction method, which mainly includes the following steps:

[0027] Step 100, receiving satellite position data, satellite unavailable information data, satellite failure information data and airline flight plan data;

[0028] Step 200, according to the prediction preparation data, the prediction preparation data includes satellite position data, satellite unavailability information data, satellite failure information data and airline flight plan data, calculate the parameters of the satellite pseudorange measurement error at a time-space point in the flight plan ;

[0029] Step 300, constructing weighting coefficients according to the parameters of satellite pseudorange measurement errors;

[0030] Step 400, calculating the HPL of the receiver at the s...

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Abstract

A method for predicting usability of receiver perfectness monitor includes receiving satellite position information, satellite unusable information, satellite failure information and flight-plan data of air company; calculating parameter of satellite pseudo-distance measurement error and setting up weighting matrix based on said parameter; calculating HPL of receiver on space-time point assigned by flight-plan data according to weighting matrix, satellite observation matrix, error detection rate and undetected rate then comparing HPL with HAL for obtaining usable state of receiver RAIM.

Description

technical field [0001] The present invention relates to a method for predicting the availability of receiver autonomous integrity monitoring, in particular to the receiver autonomy when an aircraft flies according to the airline flight plan in a system using the Global Positioning System (Global Positioning System, hereinafter referred to as GPS) for navigation. A method for predicting the availability of integrity monitoring belongs to the field of satellite navigation. Background technique [0002] The GPS satellite navigation system can simultaneously provide land, sea and air users with continuous and accurate three-dimensional position, speed and time information all over the world, and has been popularized in military and civilian applications. The world's civil aviation community is promoting the development and application of the Global Navigation Satellite System (Global Navigation Satellite System, hereinafter referred to as GNSS) and various augmentation systems. ...

Claims

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Application Information

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IPC IPC(8): G01S5/02G01S5/14H04B7/185G01S19/23
Inventor 张军朱衍波张淼艳薛瑞
Owner BEIHANG UNIV
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