Formation LEO satellite inter-satellite time synchronization and evaluation method

A time synchronization and satellite technology, applied in satellite radio beacon positioning systems, measuring devices, instruments, etc., can solve the problems of abnormal maneuvering of LEO satellites, less effective computing resources of satellite platforms, and difficulties in real-time evaluation, and achieve the goal of improving the convergence speed Effect
CN112799105AActive Publication Date: 2021-05-14NO 54 INST OF CHINA ELECTRONICS SCI & TECH GRP
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Applications(China)
Current Assignee / Owner
NO 54 INST OF CHINA ELECTRONICS SCI & TECH GRP
Publication Date
2021-05-14

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Abstract

The invention discloses a formation LEO satellite inter-satellite time synchronization and evaluation method, and belongs to the technical field of satellite time synchronization. The LEO inter-satellite common-view time comparison estimation equation is constrained by adopting the satellite dynamics smooth position, the influence of LEO satellite position errors on the time synchronization performance is weakened, and the problems that initialization is needed when the LEO satellites have abnormal maneuver and satellite platform operation resources are consumed greatly are solved. Besides, the method employs a PTP synchronization method assisted by position information and inter-satellite ranging information to autonomously achieve the inspection and evaluation of the LEO inter-satellite time synchronization performance, solves a problem of autonomous real-time online evaluation of the formation LEO satellite high-precision time synchronization, and meets the demands of autonomous estimation and real-time evaluation of the formation LEO inter-satellite high-precision time synchronization.
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Description

technical field

[0001] The invention belongs to the technical field of precise time synchronization of a satellite navigation system, in particular to an inter-satellite time synchronization and evaluation method of formation LEO satellites. Background technique

[0002] In view of the joint reconnaissance and other requirements for the collaborative work of LEO satellite formations and the requirements of navigation and positioning for low-orbit navigation constellations, how to solve the high-precision time synchronization and real-time evaluation among the formation of LEO satellites is an important problem faced by the current formation of LEO satellites. The time synchronization Performance will directly affect the measurement quality between formation LEO satellites and the service performance of navigation and positioning of LEO navigation satellites.

[0003] However, due to the problems of mission-driven maneuvering and on-orbit mechanical models of LEO satellites, ...

Claims

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