Leveling Accuracy Research Based on Trimble 5700 GPS Antenna

摘要

At present, the research on GPS elevation is mostly based on the analysis of the sources errors and the studying of the phase center deviation in different antennas and the methods of collecting the abnormalelevation values. After conducting experiences, the key factor which influent the accuracy is found,is how the phase center deviation in different antennas influent the elevation errors.And then the method of GPSelevation fitting can meet the four standards ofmeasurement accuracy of GPS.