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Troposphere Refraction Lab

Satisfactory Essays

The Troposphere has atoms and molecules which affect the radio waves between the satellite and the receiver. Due to the amount of gas present in this area group velocity decreases and the Zenith angle contributes to the troposphere refraction. The lower the zenith angle the more affected is the tropospheric refraction. Ionosphere and Troposphere has an influence on pseudo range and Carrier phase measurement because of electrons present in this region that obstruct the signal waves from the rover to the satellite, (Parker, 2003). Virtual Reference system with the GPSNET software is able to model these errors and thus the errors are reduced. The Troposphere is non dispersive for frequencies below 30 GHz, however the Troposphere adds a slight distance to the range measurement. …show more content…

Both the L1 and L2 frequencies are affected in the same manner and there is no calculation that can be performed to eliminate this effect. Modelling of the Troposphere is a technique which can be which can be up to 95 present effective; however the remaining five percentage is difficult to remove. The effect on the signals travelling through the Troposphere to a receiver can be different than that on the signal travelling to the base station, because the Troposphere is not homogeneous. This can cause the corrections applied at the rover to cause inaccuracies, particularly when working some distance from the base receiver. Care should therefore be taken to limit the distance between the rover and the

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