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Extreme value theory-based error envelope method of satellite navigation ground-based augmentation system

A ground-based augmentation system and satellite navigation technology are applied in the field of error envelopes of satellite navigation ground-based augmentation systems, which can solve the problems of reduced system continuity and excessive amplification factor, and achieve the effect of improving continuity

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

[0007] An embodiment of the present invention provides an error envelope method for a satellite navigation ground-based augmentation system based on the extreme value theory to overcome the conservative assumption of the distribution tail in the existing method, resulting in the calculated amplification factor being too large, resulting in a system The problem of reduced continuity

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  • Extreme value theory-based error envelope method of satellite navigation ground-based augmentation system
  • Extreme value theory-based error envelope method of satellite navigation ground-based augmentation system
  • Extreme value theory-based error envelope method of satellite navigation ground-based augmentation system

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Embodiment Construction

[0035] 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 making creative efforts belong to the protection scope of the present invention.

[0036] figure 1 The flow chart of the error envelope method of the satellite navigation ground-based augmentation system based on the extreme value theory provided by the embodiment of the present invention, such as figure 1 As shown, the method of this embodiment may include:

[0037] Step 101: Obtain at least two groups of pseudorange err...

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Abstract

The invention provides an extreme value theory-based error envelope method of a satellite navigation ground-based augmentation system. The method includes the following steps that: at least two groups of pseudo-range error calibration positive sample values are obtained; a first quantile which has an assigned risk and first standard deviation are corresponding to each group of pseudo-range error calibration positive sample values are determined; a second quantile which is corresponding to a total operating risk of the ground-based augmentation system (GBAS) under Standard Gaussian distribution is determined according to the total operating risk of the ground-based augmentation system (GBAS); and amplification factors corresponding to each group of pseudo-range error calibration positive sample values can be determined according to the first quantile, the second quantile and the fist standard deviation. With the above method adopted, the amplification factors can be calculated accurately, and the calculated pseudo-range calibration values can envelope actual errors, and the continuity of the system can be effectively improved.

Description

technical field [0001] The invention relates to satellite navigation technology, in particular to an error envelope method of a satellite navigation ground-based augmentation system based on extreme value theory. Background technique [0002] Ground-Based Augmentation Systems (GBAS for short) use differential technology to improve aircraft positioning accuracy. At present, GBAS can meet the requirements of civil aviation operations up to CAT I, and can be used as the main or even the only navigation system, thus making it possible for the satellite navigation system to replace the traditional land-based radio navigation system. [0003] In order to ensure flight safety, while the airborne equipment of GBAS performs differential positioning in real time, it also needs to calculate the upper limit of the positioning error under the specified risk probability, which is called the protection level. In GBAS, the ground station calculates the pseudorange correction value of each ...

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Application Information

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IPC IPC(8): G01S19/41
CPCG01S19/41
Inventor 薛瑞张军朱衍波王志鹏
Owner BEIHANG UNIV
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