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- W566694590 abstract "Multipath is one of the factors degrading the accuracy of position measurements obtained with the Global Positioning System (GPS). We investigated the effects of multipath on the carrier phase measurements and the resulting bias on relative GPS positions for observation times longer than several hours. We first model the phase error due to multipath from a single plane reflector geometry. The model is then employed to estimate upper limits of the multipath bias for general receiver environments. We also consider bias due to multipath from the flat ground, from nearby objects and from tilted ground, obtaining formulae for each situation that depend only on reflector characteristics and geometry. We find that the multipath phase error gives rise to vertical biases smaller than 2 mm and horizontal biases smaller than 1 mm if carrier-phase observations are averaged for at least several hours and if some basic precautions are taken regarding the placement of the receiving antenna." @default.
- W566694590 created "2016-06-24" @default.
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- W566694590 date "1994-01-01" @default.
- W566694590 modified "2023-10-03" @default.
- W566694590 title "Analytical estimation of carrier multipath bias on GPS position measurements" @default.
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- W566694590 doi "https://doi.org/10.6028/nist.tn.1366" @default.
- W566694590 hasPublicationYear "1994" @default.
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