Multipath interference is caused by the satellite signal reflection through buildings, vehicles, water and other interfering objects . The delayed signals cause measurement errors that are different for each type of GPS signal due to the dependency on the wavelength. Multipath affects both pseudo range and carrier phase measurements. In GPS static and kinematic precise positioning, the multipath effect is an error source that has to be taken into account. Many studies and developments have been carried out for many years to mitigate or eliminate multipath effect. The GPS observation environment plays an important role in determining the position such as the surrounding buildings that cause s
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