Research of the diurnal variation correction method during the disturbance in marine geomagnetism surveying

Based on the temporal characteristics of the disturbance,the disturbed variation correction method during the disturbance has been given out.The observed data before and after the disturbance have been well analyzed, and the quiet variation have been effectively separated form the disturbance during the disturbance.Combined with the temporal characteristic of each variation,the reasonable diurnal variation correction value will be obtained.The conclusion shows that the method can greatly improve the precision during the disturbance.