Ionospheric anomaly monitoring method, device and system for ground-based augmentation system
A ground-based enhancement system and anomaly monitoring technology, applied in the directions of measurement devices, radio wave measurement systems, satellite radio beacon positioning systems, etc., can solve problems such as inapplicability, improve accuracy, eliminate defects of nonlinear characteristics, reduce The effect of false alarm rate
Active Publication Date: 2022-03-04
THE SECOND RES INST OF CIVIL AVIATION ADMINISTRATION OF CHINA
View PDF12 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
This method has flaws and needs to process measurements on two frequencies at the same time. According to the International Civil Aviation Organization standards, the airborne subsystems and ground stations of the GBAS system use a single-frequency detection method, so it is not suitable for the GBAS system
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0058] Embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.
[0059] It should be noted that, in the case of no conflict, the following embodiments and the features in the embodiments can be combined with each other; and, based on the embodiments in the present disclosure, those of ordinary skill in the art obtained without creative work All other embodiments belong to the protection scope of the present disclosure.
[0060] It is noted that the following describes various aspects of the embodiments that are within the scope of the appended claims. It should be apparent that the aspects described herein may be embodied in a wide variety of forms and that any specific structure and / or function described herein is illustrative only. Based on the present disclosure one skilled in the art should appreciate that an aspect described herein may be implemented independently of any other aspects and that two or more of t...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The present invention provides an ionospheric anomaly monitoring method, device and system for a ground-based augmentation system. The method includes: receiving the measurement information of each navigation satellite; preprocessing the measurement information of each navigation satellite; The Jensen-Renyi divergence measure of information is used as the cost function of probability distribution estimation, and the quasi-Newton method is used for iterative calculation to estimate the probability distribution of the measurement information of each navigation satellite; for the measurement information of each navigation satellite after preprocessing The code pseudo-range measurement information and the carrier phase pseudo-range measurement information are respectively modeled according to the double-integral Gauss-Markov process and the double-integral Brownian motion process to obtain the discrete-time state equation, and according to the measurement information of each navigation satellite Probability distribution and discrete-time state equation, use nonlinear estimation method to obtain the estimated matrix of ionospheric delay; accumulate and calculate the estimated matrix of ionospheric delay to obtain the accumulated delay value, and monitor whether the ionosphere is abnormal. The invention can improve the accuracy of abnormal monitoring of the separation layer.
Description
technical field [0001] The invention relates to the technical field of GBAS, in particular to a method, device and system for monitoring ionospheric anomalies of a ground-based augmentation system. Background technique [0002] The global satellite navigation system represented by satellite navigation is applied in various fields with its obvious advantages such as all-weather and automation. However, due to the inherent characteristics of the broadcast ephemeris, it cannot completely meet the needs of special industries such as aviation. System (GBAS) and other satellite navigation augmentation systems. When the radio signal transmitted by the navigation satellite passes through the ionosphere, it will produce a distance error related to the total amount of electrons and electromagnetic wave frequency, the carrier phase is ahead of the speed in free space, the Doppler frequency shift error, radio frequency pulse distortion, and signal amplitude attenuation And adverse eff...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Patents(China)
IPC IPC(8): G01S19/07
CPCG01S19/07
Inventor 叶家全刘靖杨萍梁飞李清栋杨正波李鑫李沅锴许健
Owner THE SECOND RES INST OF CIVIL AVIATION ADMINISTRATION OF CHINA