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- W1912196283 abstract "One of the major problems currently facing
 satellite-based positioning is the atmospheric refraction of
 the GPS signal caused by the troposphere. The
 tropospheric effect is much more pronounced at the
 equatorial region due to its hot and wet conditions. This
 affects the GPS signal due to the variability of the
 refractive index, which in turn affects the positional
 accuracy, especially in the height components. This paper
 presents a study conducted in the Southern Peninsular
 Malaysia located at the equatorial region, to investigate
 the impact of tropospheric delay on GPS height variation.
 Four campaigns were launched with each campaign
 lasting for three days. The Malaysian real-time kinematic
 GPS network (MyRTKnet) reference stations in Johor
 Bahru were used. GPS RINEX data from these stations
 were integrated with ground meteorological data observed
 concurrently from a GPS station located at the Universiti
 Teknologi Malaysia (UTM), at varying antenna heights for
 each session of observation. A developed computer
 program called TROPO.exe based on the Saastamoinen
 tropospheric delay model was used in estimating the
 amount of tropospheric delay. The result reveals that,
 there is inconsistency in the delay variation, reaching
 maximum delay of 18 m in pseudo-range measurement.
 The height component shows variations with a maximum
 value of 119.100 cm and a minimum value of 37.990 cm.
 The result of the simulated data shows 5.00 m of
 differences in height gives an effect or improvement of 1.3
 mm in signal propagation. This indicates that,
 tropospheric delay decreases with increase in antenna
 height." @default.
- W1912196283 created "2016-06-24" @default.
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- W1912196283 date "2009-01-14" @default.
- W1912196283 modified "2023-09-29" @default.
- W1912196283 title "Investigation on the Impact of Tropospheric Delay on GPS Height Variation near the Equator" @default.
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- W1912196283 doi "https://doi.org/10.5130/ajict.v4i3.969" @default.
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