2009•Journal of AstronauticsRequires access

Autonomous Positioning and Timing for Navigation Constellation

Zhi Xiong

Abstract

Constellation autonomous navigation techniques can effectively enhance autonomous navigation performance of navigation constellation and ephemeris,and improve system survivability.In the paper,constellation autonomous navigation method based on inter-satellite ranges is analyzed,decoupling model and condition for position and time from inter-satellite are achieved;resolution process that position updating and time updating are sequentially executed is available.According to features of state equations and measurement equations,distributed kalman algorithm suitable for navigation constellation autonomous navigation is derived.Key simulation techniques are presented.Simulation indicates that navigation constellation autonomous positioning and inter-satellite time synchronization are achieved based on inter-satellite ranges.

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Key concepts: Constellation, Computer science, Satellite navigation, Ephemeris, Satellite constellation, Real-time computing, Satellite system, Position (finance)