What type of errors can affect GPS/GNSS systems?

The influence of multi-path, ionospheric, tropospheric, and receiver errors on GPS/GNSS systems is significant because these factors can lead to inaccuracies in positioning and navigation.

Multi-path errors occur when GPS signals reflect off surfaces like buildings or the ground and then reach the receiver, creating confusion about the true location since the signals can take longer to arrive.

Ionospheric errors are caused by variations in the ionosphere's density, affecting the speed of the GPS signals as they pass through this layer of the atmosphere. These variations can lead to delays in the signal and consequently affect accuracy.

Tropospheric errors arise from atmospheric conditions like humidity and pressure, which can slow down the GPS signals as they travel through the lower atmosphere. These errors can also introduce inaccuracies in position calculation.

Receiver errors are associated with the GPS receiver itself, such as its design, the quality of its components, and how well it processes the incoming signals. Any issues with the receiver can introduce inaccuracies in system performance.

Collectively, these error sources can degrade the reliability and precision of GPS data, making this choice the most comprehensive answer regarding the types of errors that can affect GPS/GNSS systems.