Open AccessThe influence of color temperature mismatch in star simulator on positioning accuracy and magnitude measurement by star sensor
Author(s) -
Zhiyong Wang,
Shishen Liu,
Hao Sun,
Jingjing Zhang,
Ruyou Li,
Chen Liu
Publication year - 2021
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/2132/1/012034
Subject(s) - magnitude (astronomy) , centroid , calibration , star (game theory) , physics , optics , stars , observational error , computer science , astrophysics , artificial intelligence , mathematics , statistics , quantum mechanics
During the calibrating of star sensor, the calibration accuracy is greatly affected by the mismatch between the color temperature of the light and the to-be-measured star, which further affects the attitude measurement accuracy. This paper studied the near-infrared spectra of stars with different color temperatures, and analyzed the errors on star positioning and magnitude measurement of star sensor due to the color temperature mismatch. The results showed that in the central field of view, the spot centroid deviation caused by spectral mismatch is smaller than that in the edge field of view.And the defocus of the imaging surface also affects the spot centroid deviation. Besides, when calibrating with 6000K color temperature light, the maximum measurement error can reach -1.9126 magnitude.