Single-frequency GPS receiver, in order to weaken the influence of power in mind the house, the general is the use of ionospheric models provided by the navigation data, or other suitable ionospheric model measurements to be corrected, but this model is still perfect. the current model to correct about 75% efficiency.
This method is the use of two or more receivers, the simultaneous observation of the same satellite, seeking to weaken the influence of ionospheric refraction, especially when the short distance between the observation station (20km), due to the satellite signal to reach each station, similar to the path, through the media situation, by simultaneous observations of each station on the same satellite signals and poor, can be a significant weakening of the ionospheric refraction, and its residual error will not exceed 0.000001. For single-frequency GPS receiver, the importance of this approach is particularly evident.
Tropospheric observations can be divided into dry weight and wet components. The dry components of atmospheric humidity and pressure, while the wet component of atmospheric humidity on the signal propagation path. Dry component, through the atmospheric data of the ground; the wet component is not yet possible to accurately determine. For conveying a short baseline (
This method is the use of two or more receivers, the simultaneous observation of the same satellite, seeking to weaken the influence of ionospheric refraction, especially when the short distance between the observation station (20km), due to the satellite signal to reach each station, similar to the path, through the media situation, by simultaneous observations of each station on the same satellite signals and poor, can be a significant weakening of the ionospheric refraction, and its residual error will not exceed 0.000001. For single-frequency GPS receiver, the importance of this approach is particularly evident.
Tropospheric observations can be divided into dry weight and wet components. The dry components of atmospheric humidity and pressure, while the wet component of atmospheric humidity on the signal propagation path. Dry component, through the atmospheric data of the ground; the wet component is not yet possible to accurately determine. For conveying a short baseline (
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