Proceedings of the KSRS Conference (대한원격탐사학회:학술대회논문집)
- Volume 1
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- Pages.372-375
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- 2006
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- 1226-9743(pISSN)
Analysis on the Measurement Results of the Focus Motor Position in MSC (Multi-Spectral Camera) on KOMPSAT - II
-
Heo, H.P.
(Optical Payload Department, Korea Aerospace Research Institute)
;
- Kong, J.P. (Optical Payload Department, Korea Aerospace Research Institute) ;
- Kim, Y.S. (Optical Payload Department, Korea Aerospace Research Institute) ;
-
Park, J.E.
(Optical Payload Department, Korea Aerospace Research Institute)
;
- Chang, Y.J. (Optical Payload Department, Korea Aerospace Research Institute) ;
- Lee, S.H. (Optical Payload Department, Korea Aerospace Research Institute)
- Published : 2006.11.02
Abstract
The MSC is a high resolution multi-spectral camera system which is mounted on the KOMPSAT-II satellite. The electro-optic camera system has a refocusing mechanism which can be used in-orbit by ground commands. By adjusting locations of some elements in optics, the system can be focused precisely. The focus mechanism in MSC is implemented with stepper motor and potentiometer. By reading the value of the potentiometer, rough position of the motor can be understood. The exact location of the motor can not be acquired because the information from the potentiometer can not be so accurate. However, before and after certain events of the satellite, like a satellite launch, the direction of the movement or order of the magnitude of the movement can be understood. In this paper, the trend analysis of the focus motor position during the ground test phase is introduced. This result can be used as basic information for the focus calibration after launch. By studying the long term trend, deviation from the best focal point can be understood. The positions of the focus motors after launch are also compared.