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Errors of GPS
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caused by reflected radio signals from surfaces near the GPS receiver
Multipath interference
the electromagnetic field that the receiver’s internal electronics generate when it’s turned on.
Receiver noise
GPS errors are largely due to water vapor in this layer of the atmosphere. It is fairly insignificant to GPS.
Tropospheric interference
Causes the GPS satellite radio signals to be refracted as they pass through the earth’s atmosphere
Ionospheric interference
Variation in satellite orbits due to gravitational pull and solar pressure fluctuations.
Orbit errors
Caused by slight discrepancies in each satellite’s four atomic clocks.
Satellite clock errors
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