Despite advances in GPS equipment installed at permanent sites, multipath still remains a significant error source. Strobe Correlator technology greatly reduces GPS multipath signals, which can occur when the GPS signals are reflected off tall buildings or other obstructions before captured by the receiver and, thus, increase the distance a signal travels and reduce the accuracy. A GPS receiver using Strobe Correlator performs a series of complex calculations to restore positioning accuracy. I present a technique for evaluating and correcting the multipath at GPS antenna by utilizing the Enhanced Strobe Correlator (ESC) especially in RTK GPS applications. The advanced technique of Enhanced Strobe Correlation is discussed here. In addition, the performance of the technique is presented with the experiments from real multipath environments comparing RTK GPS results with terrestrial ones.