Navigation satellite time system and its autonomous recovery method

US12099126B2 · kind B2 · utility

Assignees

• INNOVATION ACADEMY FOR MICROSATELLITES OF CAS · CN
• SHANGHAI ENGINEERING CENTER FOR MICROSATELLITES · CN

Inventors

• Baojun Lin · Hohhot, CN
• Wenbin Gong · Shanghai, CN
• Xinying Lu · Shanghai, CN
• Yuan Shen · Beijing, CN
• Tingting Chen · Shanghai, CN
• Qianyi Ren · Shanghai, CN
• Yongshan Dai · Shanghai, CN
• Zhiyang Yu · Ningbo City, CN
• Guang Bo Li · Shanghai, CN
• Xia Hong · Shanghai, CN
• Xiaoli Tian · Shanghai, CN

Key dates

• Filing date: Oct 29, 2019
• Grant date: Sep 24, 2024
• Expiry date: Jan 1, 2041

Classification

• Technology area (CPC G): Physics
• CPC primary: G01S19/256
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A navigation satellite time system and its autonomous recovery method are provided, including a load time system, the load time system is configured to generate and maintain the load time, and the load time system comprises an space borne atomic clock, a time-frequency processing unit and a plurality of load time backups module, the time information of the load time is obtained from the ground station time; the pulse-per-second signals of the load time are generated and maintained by the space borne atomic clock and the time-frequency processing unit; when the time-frequency processing unit fails, the first-level recovery state is triggered: the time-frequency processing unit compares the time information and the pulse-per-second signals reversely output by the multiple load time backup modules to perform load time recovery.