Establishment method of daytime star sensor-based infrared star detection navigation star catalogue

Abstract

The invention relates to an establishment method of a daytime star sensor-based infrared star detection navigation star catalogue, and belongs to the technical field of design of aerospace attitude sensors. The method comprises the following steps of extracting fixed stars of which any band is higher than or equal to the magnitude 8 from a 2MASS astronomical catalogue, and removing redundant information to form a basic star catalogue for cross certification; performing star catalogue cross certification on data sources of the obtained basic star catalogue and a check star catalogue; performing data fusion on the data sources of the basic star catalogue and the check star catalogue, which pass the star catalogue cross certification, to obtain a star catalogue database; performing file format finishing database establishment on the obtained star catalogue database, wherein the finished star catalogue database comprises a main data file and a data index file; performing instrument star magnitude conversion on the data source of the finished star catalogue database to establish an instrument star magnitude star catalogue; and performing star catalogue homogenizing on the obtained instrument star magnitude star catalogue, and generating a daytime star sensor-based navigation star catalogue by using the homogenized star catalogue database.

Description

technical field [0001] The invention relates to a method for establishing an infrared star detection and navigation catalog based on a diurnal star sensor, and belongs to the technical field of aerospace attitude sensor design. Background technique [0002] The star sensor is an optical attitude sensor with stars as the measurement target, which can output high-precision attitude information. Star map recognition is the core technology of star sensors, and the establishment of navigation star catalogs is an important prerequisite for star map recognition. At present, star sensors mainly work at night, and the problem of star observation in daytime environment has not been solved yet. [0003] Observing starlight during the daytime in the atmosphere must be affected by scattered sunlight, and the limit value of detectable magnitude will vary greatly due to changes in these conditions. The daylight sky irradiance in the infrared band is much lower than that of visible light,...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the deficiencies in the prior art, provide a method for establishing an infrared star detection and navigation catalog based on a diurnal star sensor, solve the problem of star observation in a daytime environment, and greatly improve the efficiency of short-wave infrared star observation Probability, improve the success rate of star map recognition, so that the star sensor has the ability to work day and night in the atmosphere

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