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Star sensor calibrating method based on detection data of high-precision telescope

A star sensor and detection data technology, applied in the field of spacecraft, to achieve the effect of improving the accuracy of attitude measurement

Inactive Publication Date: 2017-02-22
SHANGHAI SATELLITE ENG INST
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Problems solved by technology

[0004] In order to solve the problem of high-precision attitude measurement of space-based telescopes, the purpose of the present invention is to provide a star sensor calibration method based on high-precision telescope detection data, which can meet the needs of future space exploration missions

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  • Star sensor calibrating method based on detection data of high-precision telescope

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Embodiment Construction

[0015] The embodiments of the present invention are described in detail below: the present embodiment is implemented on the premise of the technical solution of the present invention, and detailed implementation is provided, but the protection scope of the present invention is not limited to the following embodiments.

[0016] like figure 1 As shown, the embodiment of the present invention provides a star sensor calibration method based on high-precision telescope detection data, including the following steps:

[0017] S1. Use a high-precision telescope to shoot multiple star maps in the current field of view, and use the star point centroid algorithm to extract the center of the star image, and perform multi-frame averaging on the star point coordinates of the star map to reduce the influence of the random error of the telescope;

[0018] S2. Use the star sensor to shoot multiple star maps in the current field of view, and use the star point centroid algorithm to extract the ...

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Abstract

The invention relates to a star sensor calibrating method based on detection data of a high-precision telescope. The star sensor calibrating method comprises the following steps: shooting on a number of star maps in the current view field on an orbit by using the telescope and a star sensor respectively, and in order to reduce influence of a random error, performing multi-frame averaging on star coordinates of the star maps and performing other on-orbit processing; performing comparative analysis on observation data of the high-precision telescope and star map data of the star sensor; according to a star sensor calibrating model, determining a star sensor calibrating coefficient so as to achieve high-precision calibration of the star sensor. By the star sensor calibrating method based on the detection data of the high-precision telescope, provided by the invention, influence of atmospheric refraction and other factors on ground calibration can be eliminated, calibration parameter changes caused by temperature, vibration and other reasons can be compensated, high-precision on-orbit calibration of the star sensor can be achieved, and the accuracy of star sensor measurement is further improved; therefore, the star sensor calibrating method has an engineering application value.

Description

technical field [0001] The invention relates to the field of spacecraft, in particular to a star sensor calibration method based on high-precision telescope detection data. Background technique [0002] As a typical detection object, exoplanets carry the significance of discovering habitable planets and extrasolar life, and are the hot spot and focus of current research. Develop fine spectral measurement technology, build large-scale space telescopes, study exoplanet atmospheres, finely characterize the physical and chemical characteristics of exoplanets, and continue to carry out research on exoplanets with higher precision, greater depth, and stronger efforts. Discover and explore. [0003] However, exoplanet detection puts forward higher requirements on the accuracy and stability of space-based telescopes. As a high-precision attitude measurement device, the star sensor still cannot meet the needs of very high-precision space science detection. Therefore, it is urgent ...

Claims

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Application Information

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IPC IPC(8): G01C25/00
CPCG01C25/00
Inventor 王伟张恒潘耀李金岳毕振瀚
Owner SHANGHAI SATELLITE ENG INST
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