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GBAS integrity assessment and processing method and system

A technology for evaluating processing and integrity, applied in the field of satellite navigation, achieving high availability and increasing sample sampling frequency

Active Publication Date: 2015-09-02
BEIHANG UNIV
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Problems solved by technology

[0005] The present invention provides a GBAS integrity evaluation processing method and system, which fundamentally solves the problem of both high confidence of GBAS and high availability of the system by improving the sampling efficiency

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  • GBAS integrity assessment and processing method and system
  • GBAS integrity assessment and processing method and system
  • GBAS integrity assessment and processing method and system

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Embodiment Construction

[0030] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0031] figure 1 It is a flow chart of the GBAS integrity assessment processing method according to the first embodiment of the present invention; as figure 1 As shown, the GBAS integrity assessment processing method of this embodiment may specifically include the following steps:

[0032] Step S100, obtain the time-related error of GBAS, and dec...

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Abstract

The invention provides a GBAS integrity assessment and processing method and system. The method comprises the steps of obtaining a time-related error of a GBAS, decomposing the obtained linear system based on the time-related error to obtain a first unknown sub system G1, a second unknown sub system G2 and a known sub system H; conducting timing model fitting for the first unknown sub system G1 and the second unknown sub system G2 respectively to obtain the model parameter and fitting residue of the first unknown sub system G1 and the model parameter and fitting residue of the second unknown sub system G2; obtaining the envelope of the time-related error according to the model parameter and fitting residue of the first unknown sub system G1, the model parameter and fitting residue of the second unknown sub system G2, and the unit pulse response of the unknown sub system H; obtaining the protection level of the GBAS according to the envelope of the time-related error; and comparing the protection level and a preset alarm limit, and generating an alarm signal when the protection level exceeds the preset alarm limit.

Description

technical field [0001] The invention relates to satellite navigation technology, in particular to a GBAS integrity evaluation processing method and system. Background technique [0002] At present, the satellite navigation Ground Based Augmentation System (GBAS) widely uses differential positioning technology to improve positioning accuracy. At the same time, the integrity monitoring algorithm is used to measure and monitor the correctness of the error correction information provided by the system. GBAS realizes integrity monitoring by calculating the Protection Level (PL) and comparing it with the specified Alarm Limit (AL), and giving an alarm when the alarm limit is exceeded. [0003] In the process of calculating the protection level, it is always assumed that the error obeys the Gaussian distribution, but the actual error does not obey the Gaussian distribution, and there are not enough samples to determine the true distribution of the error. Therefore, a method called...

Claims

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Application Information

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IPC IPC(8): G01S19/20
CPCG01S19/20
Inventor 张军朱衍波方堃薛瑞赵鹏
Owner BEIHANG UNIV
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