Inter-satellite relative observation method used for satellite formation

Abstract

The invention discloses an inter-satellite relative observation method used for satellite formation, and belongs to the technical field of satellite formation flight space measuring. According to the inter-satellite relative observation method, a star sensor is arranged on an observation satellite; observation conditions of the star sensor are provided, an observed satellite is taken as the relative azimuth measurement reference source of the star sensor by the observation satellite, the star sensor is used for measuring the unit direction vectors of the observed satellite relative to the observation satellite, and the direction vectors of the observed satellite relative to the observation satellite are calculated based on the distance from the observed satellite to the observation satellite obtained via inter-satellite link measuring. The inter-satellite relative observation method is used for system analysis of illumination conditions and observation conditions needed by inter-satellite observation using the star sensor, and a series conditions used for guaranteeing observation quality and precision are provided. The inter-satellite relative observation method can be used for providing high precision relative observation information for satellite formation flying, and solving a problem that navigation precision is low because of lack of satellite formation flying observation information.

Description

technical field [0001] The invention relates to an inter-satellite relative observation method for satellite formation, and belongs to the technical field of satellite formation flight space measurement. Background technique [0002] A satellite formation is generally composed of a reference satellite (or master star) and several accompanying satellites (or slave stars). All satellites in the formation work together to complete space observation tasks that are difficult for a single satellite. Satellite formation flight navigation is one of the key technologies for studying formation flight. The quality of the navigation task depends on the accurate relative state information between satellites. configuration control. [0003] In recent years, with the changes in the accuracy and mission area of ​​satellite formation flight, scholars at home and abroad have conducted a lot of research on satellite formation flight inter-satellite relative measurement technology, mainly incl...

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Problems solved by technology

(2) In view of the absence of navigation signals for satellite formation missions in medium and high orbits, an inter-satellite radio navigation scheme is proposed; although its measurement accuracy is high, its working distance is far away, and its positioning time is short, radio waves are easily interfered by the space environment

(3) Visual measurement is produced with the development trend of deep space and autonomy of satellite formation flight missions. Due to its advantages of low cost and easy realization, it can solve the problem of determining relative pose parameters with high precision at short distances. It plays an important role, but due to the difficulty of feature point extraction and poor anti-occlusion ability, it is not suitable for the relative navigation of medium and long-range satellite formations

[0004] When multiple satellites fly in formation, the number of satellites is often large, and the single-satellite autonomous navigation method often ignores the relative motion information between the satellites during the formation flight.

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