Authors: Yunting Li Jun Zhang Wenwen Hu Jinwen Tian
Publish Date: 2013/09/29
Volume: 115, Issue: 4, Pages: 561-570
Abstract
The highprecise star sensor calibration method requires highaccurate turntable collimator star point plate or other highprecision devices that are very expensive We present a simple and available method to calibrate the principal point focal length radial distortion tangential distortion and installation error of star sensor in laboratory and without having high accurate or expensive devices The calibration model takes the ordinary camera calibration methods and installation error into account The installation error is modeled by combination of three typical effects the installation of pantiltzoom PTZ initial status PTZ and chargecoupled device which result in six parameters The proposed procedure consists of a closedform solution followed by a nonlinear refining based on maximum likelihood criterion Our calibration method is validated through simulation and real data that shows the superiority with respect to the traditional methods and has the same level as the stateoftheart methods The accuracy of our calibration method is 0015° in the root of mean square distances between testing points and projected ones
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