Star sensor navigation star catalogue screening method

A technology of star sensor and screening method, applied in astronomical navigation and other directions, can solve the problems of uncertain distribution of star catalogs, many redundant navigation stars, and complicated preparation process of star catalogs, so as to ensure reliability and applicability, and improve distribution. Uniformity, the effect of reducing the storage space of the star table

Active Publication Date: 2018-10-12
BEIJING INST OF CONTROL ENG
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Problems solved by technology

[0008] The problem solved by the technology of the present invention is: to overcome the deficiencies of the prior art, to provide a star sensor navigation star catalo

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  • Star sensor navigation star catalogue screening method
  • Star sensor navigation star catalogue screening method
  • Star sensor navigation star catalogue screening method

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Embodiment Construction

[0032] The inventive method has been applied to the preparation of the Orbit Video Star (Zhuhai No. 1) nano-type star sensor navigation star catalog, and the ground test and on-orbit application show that the inventive method is feasible. In conjunction with this application example, the present invention is as follows figure 1 The detailed steps shown are as follows:

[0033] (1) The star sensor works through the stars in the sensitive sky area, and the two most important information of its detection target are the azimuth and magnitude of the stars. Although the current basic astronomical star catalog contains the azimuth and magnitude of the stars, but specific to the actual product, due to the difference in the spectral response of the detector, it is necessary to use the color index to fit the instrument magnitude used in the calculation product as needed.

[0034] (2) According to the limit detection sensitivity of the product, the selected basic astronomical star catalo...

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Abstract

A star sensor navigation star catalogue screening method comprises the following steps: eliminating navigation stars with the star magnitudes being larger than that of a star sensor limit detection star and navigation stars with the fixed star attribute tags being binary stars or variable stars from a star catalogue, screening alternative navigational stars from the star catalogue from small to large according to the size of the star magnitude and a reference angular distance, and screening secondary alternative navigation stars according to the angular distance between the alternate navigation stars and a target navigation star to obtain a navigation star catalogue. Bright stars with a high signal-to-noise ratio are preferably selected, and the problems of complicated screening process, many redundant navigation stars and uneven distribution of the star catalogue in existing star catalogue screening processes are solved.

Description

technical field [0001] The invention relates to a star sensor navigation star table screening method, which belongs to the technical field of aerospace measurement and control. Background technique [0002] As an essential part of the star sensor software, the navigation star catalog is the basic data to realize its attitude calculation function. Constrained by the limited hardware resources on the star, and the application requirements of high precision, high reliability, and all-day autonomous star map recognition, the navigation star table for star sensors should have the characteristics of small storage space, full sky area coverage, and high coordinate accuracy. , to continuously and quickly provide uniform and accurate navigation star data for product work. [0003] For this application goal, the current common navigation star catalog screening methods for star sensors include "orthogonal grid method", "magnitude weighting method", "accuracy inverse algorithm" and "se...

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Application Information

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IPC IPC(8): G01C21/02
Inventor 周建涛王艳宝王立程会艳武延鹏张运方曹中祥苏畅
Owner BEIJING INST OF CONTROL ENG
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