The Effect of 1PPS Time Synchronization upon the Multibeam Echosounding

Time synchronization error is one of the critical error sources in multibeam echosounding survey.Therefore,when carrying on multibeam seabed topography survey,it generally uses GPS's 1PPS signal to achieve accurate time synchronization.This article introduces the 1PPS signal and an analysis of multibeam echosounding system time synchronization principles.In the condition of the absence of synchronized 1PPS,the operator should pay attention to post-processing.Finally the paper gives some recommendations to the field data acquisition.