What are the different sources of errors in GPS and how can they be mitigated?

Question

Accepted Answer

Sources of errors in GPS include atmospheric conditions, satellite clock errors, multipath interference, and receiver errors.

Atmospheric conditions such as ionospheric and tropospheric delays can cause signal distortion.
Satellite clock errors can lead to inaccuracies in time synchronization.
Multipath interference occurs when signals bounce off buildings or other obstacles before reaching the receiver.
Receiver errors like signal noise or hardware malfunctions can also introduce inaccuracies.
Errors can be mitigated through techniques like differential GPS, which uses a reference station to correct for signal distortions.
Selective availability (SA) was a deliberate degradation of GPS signals by the US government for security reasons, but it was turned off in 2000 to improve accuracy for civilian users.

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