Completeness support information parameter generation method and system suitable for Beidou

A technology that supports information and integrity, applied in the field of satellite navigation, can solve the problems of lack of long-term stable navigation data, short operation time of Beidou system, large integrity risk, etc., and achieve the effect of reducing integrity risk.

Pending Publication Date: 2022-03-08
BEIHANG UNIV
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  • Description
  • Claims
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Problems solved by technology

[0006] The purpose of the present invention is to provide a method and system for generating integrity support information parameters suitable for Beidou, which solves the problem that the Beidou system has a short running time and lacks long-term stable navigation data to analyze its performance, which leads to the inability of different orbiting satellites of the Beidou system. The integrity support message provided by the ground monitoring station can be used to adjust the performance parameters of each core constellation in a timely manner, while the existing GPS ISM algorithm is not suitable for satellites in different orbits of the Beidou system, which may easily lead to greater integrity risk problems

Method used

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  • Completeness support information parameter generation method and system suitable for Beidou
  • Completeness support information parameter generation method and system suitable for Beidou
  • Completeness support information parameter generation method and system suitable for Beidou

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Embodiment 1

[0067] Such as figure 1 As shown in the flow chart, this embodiment provides a method for generating integrity support information parameters suitable for Beidou, and the method includes the following steps:

[0068] S1. Set the initial sampling time and sampling interval, sample the satellite observation data of each orbit of the Beidou system according to the sampling interval within the sampling time, and obtain the satellite observation data sets of each orbit of the Beidou; take 15 minutes as the sampling interval, Select 10 days of satellite data as the Beidou orbit satellite observation data set;

[0069] S2. Calculate the user distance error URE by using the satellite observation data in the Beidou orbit satellite observation data set to obtain the initial sample data set;

[0070] In specific implementation, such as figure 2 In the flow chart shown, step S2 specifically includes:

[0071] S21. Eliminate the abnormal observation data in the Beidou orbit satellite o...

Embodiment 2

[0140] Corresponding to Embodiment 1, the present invention also provides a system for generating integrity support information parameters suitable for Beidou.

[0141] In addition, the method of embodiment 1 of the present invention can also be by means of Figure 5 The architecture shown for Beidou integrity support information parameter generation system is implemented. Such as Figure 5 As shown, the integrity support information parameter generation system may include a satellite observation data acquisition module 1, a satellite observation data set processing module 2, an FCM classification module 3, a data set expansion module 4, a Beidou broadcast URA acquisition module 5, and a URA evaluation module 6 and information sending module 7; some modules can also have subunits for realizing its functions, for example, abnormal data removal unit 2-1 and URE calculation unit 2-2 can also be included in satellite observation data set processing module 2; The expansion module...

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Abstract

The invention provides an integrity support information parameter generation method and system suitable for Beidou, and the method comprises the steps: collecting observation data of each orbit satellite of a Beidou system, correspondingly calculating a user distance error, obtaining an initial sample data set, carrying out the classification of the initial sample data set through an FCM clustering algorithm, and obtaining a plurality of types of sample data sets; according to the method, the URE distribution of the worst condition of various tails of a multi-class sample data set is selected to evaluate the broadcast URA of a Beidou system ground monitoring station, and the broadcast URA most conforming to various satellites of the Beidou system is obtained and sent to a user, so that the obtained broadcast URA better conforms to the requirement of integrity monitoring of the Beidou system. Therefore, the ISM parameters broadcasted by the ground monitoring station conform to the performance of the Beidou system, and the integrity risk when the ARAIM is adopted is reduced.

Description

technical field [0001] The invention relates to the technical field of satellite navigation, in particular to a method and system for generating integrity support information parameters suitable for Beidou. Background technique [0002] In 2008, the US Federal Aviation Administration combined the development status of multi-constellation and multi-frequency satellite navigation systems for the first time to propose the concept of Advanced Receiver Autonomous Integrity Monitor (ARAIM): support the use of dual-frequency signals to eliminate ionospheric errors; It supports the simultaneous use of multiple navigation constellations; it can use the ground monitoring network distributed around the world; and adjust the performance parameters of each core constellation in time through the Integrity Support Message (ISM) provided by the ground monitoring stations, and finally realize vertical navigation on a global scale Performance requirements LPV-200. [0003] In recent years, w...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06K9/62G06F17/18G06F17/10G01S19/23G01S19/37
CPCG06F17/18G06F17/10G01S19/23G01S19/37G06F18/23213G06F18/241
Inventor 王志鹏方堃谢玉文
Owner BEIHANG UNIV
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