Abstract: In the GPS satellite, signal can easily be disturbed by the objects in the surroundings of the receiver which can reduce the accuracy in the parameters of amplitude and phase of a signal at the receiver side. Due to this low accuracy, reflections will be occurred. These reflections causes multipath that can be occurred at the GPS receiver side, it is one of the major problem in GPS. Multipath is nothing but the signal that reaches the receiving side other then the straight line by two or more paths. To estimate the multipath error, Signal to Noise Ratio (SNR) is used at the GPS receiver. In this, MUSIC algorithm also used to calculate the multipath parameters (amplitude and phase). We estimate the errors occurred due to multipath is further used to improved GPS signal precession.