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Moon phase-based solar vector direction extraction method

A sun vector and vector direction technology, which is applied in the aerospace field, can solve the problems of blurred edges of the moon and low precision of the sun vector direction, and achieve the effects of simple calculation, wide application range, and reduced impact of measurement errors

Active Publication Date: 2020-07-03
INNOVATION ACAD FOR MICROSATELLITES OF CAS +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the method in this document is suitable for the situation where the distance from the moon is far away, and compared with the outline of the moon's edge, the edge of the moon caused by the sun will be blurred, so the calculated sun vector direction has low accuracy

Method used

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  • Moon phase-based solar vector direction extraction method
  • Moon phase-based solar vector direction extraction method
  • Moon phase-based solar vector direction extraction method

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Embodiment Construction

[0019] 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.

[0020] In this specification, reference to "one embodiment" or "the embodiment...

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Abstract

The invention provides a moon phase-based solar vector direction extraction method. In a lunar sensitive period coordinate system, the included angle invariance between the lunar edge direction and the sun vector direction is utilized, the sun vector direction is calculated by combining a least square method and lunar phase information, satellite navigation is carried out by using the sun vector direction, and the application range is wide.

Description

technical field [0001] The invention relates to the field of aerospace technology, in particular to a method for extracting the sun vector direction based on the moon phase. Background technique [0002] With the development of aerospace technology, the autonomous navigation capability of satellites has become more and more important. Among them, astronomical navigation has become a hot spot for autonomous navigation due to its advantages of high autonomy, strong anti-interference, and no accumulation of errors. It uses external celestial bodies as a reference Satellite autonomous navigation can be quickly realized. As the brightest celestial body on the earth at night, the moon phase changes reflect the relative information between the sun, the moon and the observer, so the sun vector information can be extracted from the moon phase. [0003] The current extraction method of the solar vector method based on the moon phase has a narrow application range and has a large meas...

Claims

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Application Information

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IPC IPC(8): G01C21/02
CPCG01C21/025
Inventor 杨中光朱晓铖蔡志鸣陈雯余金培
Owner INNOVATION ACAD FOR MICROSATELLITES OF CAS