Signal Process and Accuracy Analyses of the Reticon Detector Used for Precise Positional Measurement

By using the output signals of the Reticon detectors attached to the Lower Latitude Meridian Circle,two methods,moment method and cross-correlation function method,are used to analyze the precision of positional measurement.The results show that when the measured system is stable,the precision of the Reticon used to detect the variation in position is better than ±0.01 pixel for a single measurementment.