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Acta Armamentarii ›› 2021, Vol. 42 ›› Issue (11): 2368-2378.doi: 10.3969/j.issn.1000-1093.2021.11.010

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Cross-validation and Optimization of SWIR Star Catalogue in Celestial Navigation

ZHANG Geng1, LI Chonghui1, ZHANG Chao1, DU Xingzhen2, LIU Changhao3   

  1. (1.PLA Strategic Support Force Information Engineering University,Zhengzhou 450001,Henan,China;2.Unit 61206 of PLA,Beijing 100042,China; 3.Unit 95972 of PLA,Jiuquan 735018,Gansu,China)
  • Online:2021-12-27

Abstract: Continuous day and night star surveys in the short-wave infrared band are expected to realize all-time celestial navigation in near-earth space,which is of great significance for improving the usability and continuity of celestial navigation systems.A short-wave infrared star catalogue with complete information is an essential foundation for all-sky celestial navigation. Since there is a lack of the information about the motion of stars necessary for celestial navigation and the extremely uneven distribution of stars, the existing infrared star catalogues,such as two micron all sky survey (2MASS) and wide-field infrared survey explorer, cannot be directly applied to astronomical positioning and orientation. Based on the analysis of the current main star catalogues,2MASS infrared star catalogue and the visible light Tycho-2 catalogue are certified and a short-wave infrared star catalogue containing complete information of the stars themselves is presented.Then the quasi-uniform star catalogue division method is used to analyze the characteristics of the cross-validated star catalogue. The star catalogue is optimized using the “angle distance + magnitude” weighted screening method. The short-wave infrared star catalogue is obtained with an average star distribution density of 0.5 stars per square degree and a coefficient of variation of 0.14 throughout the sky.

Key words: celestialnavigation, short-waveinfraredstarcatalogue, 2MASScatalogue, cross-validation, pixelizationofsphere

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