Abstract
The Signal-to-noise Ratio(SNR) of star-level detection and the energy concentration of a dispersed spot for an lunar-based Optical Telescope(LOT) are tested by using a simulation experiment on ground to verify its detection capability.Unlike the conventional methods that use the effect of CCD hardware parameters on the noise to test the SNR,the new test method directly uses the observation information to compute the SNRs of star targets and the tested uncertainty of object SNRs can be better than 8%.In the test of energy concentration,the centroid algorithm is used to computer the center of the dispersed spot and a Gaussian fitting method is proposed to fit the curve of the energy distribution.The Gaussian fitting method can significantly improve the detection precision of the energy concentration for the dispersed spot,and the testing precision has been improved by 10%.Finally,the detection capability of +15Mv of the LOT is verified by an experiment on the SNR of star level detection and the energy concentration of dispersed spot for the LOT.
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