A navigation satellite time-frequency integrity autonomous monitoring system and method
A monitoring system and a technology for navigation satellites, applied in the field of navigation satellites, can solve the problems of inability to achieve single-machine-level positioning for whole-system monitoring, affecting the availability and continuity of navigation satellites, and long time for judging faults. The effect of facilitating fault recovery and improving system reliability
Active Publication Date: 2021-12-14
INNOVATION ACAD FOR MICROSATELLITES OF CAS +1
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Problems solved by technology
[0004] The traditional judgment of time-frequency integrity is usually based on ground telemetry. However, due to the limited telemetry channel capacity and telemetry data, many faults cannot be directly determined by the faulty single machine, and it takes a long time to judge the fault, which makes the fault recovery time long. , thus affecting the availability and continuity of navigation satellites
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[0034] In the following description, the present invention is described with reference to various examples. One skilled in the art will recognize, however, that the various embodiments may be practiced without one or more of the specific details, or with other alternative and / or additional methods, materials, or components. In other instances, well-known structures, materials, or operations are not shown or described in detail so as not to obscure the inventive concepts of the present invention. Similarly, for purposes of explanation, specific quantities, materials and configurations are set forth in order to provide a thorough understanding of embodiments of the invention. However, the invention is not limited to these specific details. Furthermore, it should be understood that the embodiments shown in the drawings are illustrative representations and are not necessarily drawn to correct scale.
[0035] In this specification, reference to "one embodiment" or "the embodiment...
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The invention discloses a navigation satellite time-frequency integrity self-monitoring system and method, comprising a high-stable crystal oscillator, a 10MHz phase detection module for a main clock, a 10MHz phase detection module for a backup clock, a 10.23MHz phase detection module, and a health judgment and processing unit. Through the 10MHz phase detection module of the main clock and the 10MHz phase detection module of the backup clock, according to the signal generated by the high-stable crystal oscillator, the 10MHz signal generated by the main clock and the backup clock is monitored, and the 10.23MHz phase detection module is used according to the 10MHz signal generated by the backup clock. The 10.23MHz signal generated by the baseband processor is monitored, and finally the health judgment and processing unit is carried out according to the monitoring results of the main clock 10MHz phase detection module, the backup clock 10MHz phase detection module and the 10.23MHz phase detection module. Fault location.
Description
technical field [0001] The invention relates to the technical field of navigation satellites, in particular to a navigation satellite time-frequency integrity autonomous monitoring system and method. Background technique [0002] Navigation satellites are artificial satellites used to provide wireless navigation signals and navigation information, and provide users with navigation, positioning and timing services. The navigation satellite system has high positioning accuracy and a wide range of services. It can provide all-day, all-weather, and continuous navigation and positioning services. It has become a major national infrastructure in the field of space-time positioning and an important support for the status of a major country and strategic interests. [0003] The load subsystem is the main load for navigation satellites to provide navigation services. It receives the navigation information noted on the ground operation and control, and modulates the navigation informa...
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IPC IPC(8): G01S19/20
CPCG01S19/20
Inventor 李光任前义龚文斌邵丰伟沈苑余志洋沈冠浩宋彬
Owner INNOVATION ACAD FOR MICROSATELLITES OF CAS