Contemporary projects requiring real time positions with especially cm
accuracies have begun to employ Real Time Kinematic GPS (RTK GPS)
technique for its speedy and productive nature. As in all types of GPS
techniques, RTK GPS is also vulnerable to multipath errors. The purpose of
this study is to investigate this source of error. This study tries to answer some questions such as how much multipath error causes real time
positioning error, and in what kind of environment this error is the most
effective. A background on multipath error is first given and the
environment causing this effect is widely researched, and then a test that
brings out the most multipath error is conducted. The findings are presented,and conclusions and suggestions are included for future researches.