How GPS Works, Error Modeling

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Error Modeling

Much of the delay caused by a signal's trip through our atmosphere can be predicted.

Mathematical models of the atmosphere take into account the charged particles in the ionosphere and the varying gaseous content of the troposphere.

On top of that, the satellites constantly transmit updates to the basic ionospheric model.

A GPS receiver must factor in the angle each signal is taking as it enters the atmosphere because that angle determines the length of the trip through the perturbing medium.

Hey, THIS IS ROCKET SCIENCE!

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