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Satellite navigation system integrity monitoring method and system based on networked low earth orbit satellites

A satellite navigation system and integrity monitoring technology, applied in the field of satellite navigation, can solve the problems of unavailable integrity monitoring and low reliability of integrity monitoring, so as to improve the ability and reliability of integrity monitoring and rapid alarm, reduce geometric Dependence on the distribution, the effect of reducing the probability of influence

Active Publication Date: 2018-12-14
BEIJING FUTURE NAVIGATION TECH CO LTD
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Problems solved by technology

The space-based augmentation system can realize the integrity monitoring of global non-precision approaches, but it must require that the geometric distribution of the current observable satellites is good, and it is prone to the situation that the integrity monitoring is not available
[0003] It can be seen that the availability of the existing space-based augmentation system for the integrity monitoring of the satellite navigation system depends on the geometric distribution of the current observable satellites, so the reliability of the integrity monitoring is not high

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  • Satellite navigation system integrity monitoring method and system based on networked low earth orbit satellites
  • Satellite navigation system integrity monitoring method and system based on networked low earth orbit satellites

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[0031] Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided for more thorough understanding of the present disclosure, and to fully convey the scope of the present disclosure to those skilled in the art.

[0032] figure 1 A satellite navigation system integrity monitoring method based on networked low-orbit satellites according to an embodiment of the present invention is shown. The satellite navigation system here can include: any number of systems in the GPS system of the United States, the Beidou Satellite Navigation and Positioning System (BDS) of China, the GLONASS system of Russia, and the GALILEO system of the European Union,...

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Abstract

The invention discloses a satellite navigation system integrity monitoring method and system based on networked low earth orbit satellites. The method comprises the steps that each low earth orbit satellite receives a navigation signal of a navigation satellite system and ranging signals of the adjacent low earth orbit satellites, and a navigation message and a pseudo-range observed quantity are obtained; each low earth orbit satellite executes integrity monitoring by use of the obtained navigation message and pseudo-range observed quantity; each low earth orbit satellite receives integrity monitoring results of at least two adjacent low earth orbit satellites, so that at least three groups of integrity monitoring results are obtained, and whether a navigation satellite has a fault is comprehensively judged according to the integrity monitoring results; and each low earth orbit satellite broadcasts a judgment result to a ground user. The system comprises a navigation satellite navigation signal receiver, an adjacent low earth orbit satellite link transceiver, an integrity monitoring data acquisition device, an integrity monitoring separate processing device, an integrity monitoringjoint processing device and an integrity monitoring joint processing result transmitter. Through the satellite navigation system integrity monitoring method and system, the satellite fault can be effectively monitored, and the probability that the navigation result of the user is influenced by a fault signal is lowered.

Description

technical field [0001] The invention relates to the field of satellite navigation, in particular to a method and system for integrity monitoring of a satellite navigation system. Background technique [0002] Integrity refers to the ability to provide timely warnings to users when the system cannot be used for normal navigation, positioning or system error exceeds the limit. Integrity is important for many applications when using satellite navigation and positioning systems, but it is critical for life safety services such as civil aviation and maritime. In order to improve the integrity of satellite navigation, international civil aviation has given three solutions: ground-based augmentation, satellite-based augmentation and space-based augmentation. The ground-based augmentation system is to set up a monitoring station near the airport to monitor the integrity of the visible satellites and calculate the pseudo-range difference information, and send the difference informat...

Claims

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Application Information

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IPC IPC(8): G01S19/20
CPCG01S19/20
Inventor 穆旭成
Owner BEIJING FUTURE NAVIGATION TECH CO LTD
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