Analysis of Correlation Relationship in Dynamic Data from TT&C Ship-borne Trajectory Measurement Equipments

The study and analysis of correlation relationship in TTC ship-berne trajectory measurement data show:using difference method to correct the stability of measured data can eliminate its change tendency and the stability requirement would be satisfied.It is known that partial correlation function reflects the correlation between x_t,x_s,which changes little after difference method treatment,so partial correlation function should be mainly used as basis when analyzing correlation between measurement data.The treatment result shows:correlation step-length of slant range R is about 30 steps and correlation time is about 3s,more than that of other measurement elements,showing R has stronger correlation and slant range measured at a certain time is more likely to be affected and restricted by that measured at previous time.Correlation steps of other measurement elements are about 15 steps,and correlation time is about 1.5s.