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ISSN 2070-7401 (Print), ISSN 2411-0280 (Online)
Sovremennye problemy distantsionnogo zondirovaniya Zemli iz kosmosa
CURRENT PROBLEMS IN REMOTE SENSING OF THE EARTH FROM SPACE

  

Sovremennye problemy distantsionnogo zondirovaniya Zemli iz kosmosa, 2014, Vol. 11, No. 2, pp. 165-174

Development of effective light-protective baffle construction for star tracker

O.V. Filippova1 , R.V. Bessonov1 , G.A. Avanesov1 
1 Space Research Institute RAS, Moscow, Russia
This article describes the construction principles of a star tracker's light-protective baffle, as well as methods to improve its geometric design. The available ways to enhance the suppression due to changes in manufacturing technology of the baffle are analyzed. A brief description of the historical development path of the light-protective baffle design and the main problems that had to be overcome to ensure the proper side illumination suppression are presented.
The role of the star tracker’s optical elements in suppressing side illumination is described. The results of researching the star tracker’s light-protective system, as well as theoretical and experimental determination of the side illumination acceptable level depending on hardware and software being used are given. The possibilities for further development of light-protective system in order to improve star tracker’s performance are described.
The experimental part of the work consists in measuring the diffuse ratio of different coatings, dissipation at the edges of the baffle diaphragm, side illumination suppression ratios of lens and baffle. Measurements confirming the correctness of the theoretical model and consistent with the simulation results were carried out.
Keywords: star tracker, baffle, suppression ratio, illumination intensity distribution, lateral lighting, attitude determination, and angle of lighting, edge of diaphragm
Full text

References:

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