Sovremennye problemy distantsionnogo zondirovaniya Zemli iz kosmosa, 2021, Vol. 18, No. 2, pp. 82-94
Modeling of images of the starry sky in problems of ground testing of orientation sensors
G.A. Avanesov
1 , V.A. Shamis
1 , Ya.D. Elyashev
1 1 Space Research Institute RAS, Moscow, Russia
Accepted: 25.02.2021
DOI: 10.21046/2070-7401-2021-18-2-82-94
To test the stellar orientation sensors, two programs for simulating the images of the starry sky were created at the Optical Physics Department of the Space Research Institute RAS. SkyViewer software projects an image of the starry sky onto the dynamic test bench screen. At this stand, the functioning of all stellar orientation devices is tested, and the mathematical apparatus used by them is checked. FrameMaker creates a frame of the starry sky that is identical to the real frames received by the star orientation sensors. These frames allow testing the software at the design and development stage of the stellar orientation sensor without using real instruments. Both programs use the same software modules. These modules are responsible for generating the orbit of the spacecraft (SC), calculating the three-axis motion of the spacecraft, calculating the photometric characteristics of the devices, projecting the starry sky into the plane of the photodetector or monitor screen, forming images of stars in this plane, calculating aberrations, generating extraneous noise and interference on the final image, as well as saving and displaying the results. This article outlines the principles of operation of both programs, and also discusses the main functions of each software module.
Keywords: star orientation sensor, starry sky, dynamic test bench, satellite orbit, triaxial satellite motion, photometry, projection of the starry sky onto a plane, star image, aberration, random and structural noise
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