Abstract
Multipath is one of the prominent error sources in GNSS position fixing which introduces error in code and carrier phase measurements. The error in code phase measurements is large. Having increasing number of satellites with multiple frequencies, the linear combination of signal measurements can be used to estimate and/or mitigate the multipath interference. This paper evaluates the triple frequency approach and its comparison with conventional dual frequency Code Minus Carrier (CMC) technique. It is evident from the results that estimation of multipath error using triple frequency gives unbiased absolute error when compared CMC technique. The mean multipath errors estimate reduced to 0.002 m.
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