Final answer:
Most GPS receivers use the Doppler shift of the carrier phase to compute speed. Doppler shift of the carrier frequency of the satellite signals. The Doppler shift is caused by the motion of the GPS receiver relative to the satellites. By analyzing this shift in frequency, the GPS receiver can calculate the speed of the receiver.
Step-by-step explanation:
Most GPS receivers use the Doppler shift of the carrier phase to compute speed. GPS relies on an array of 24 satellites orbiting the Earth, and at least 4 of them are visible from any spot on Earth. Each satellite carries a precise atomic clock. Your GPS receiver detects the signals from those satellites that are overhead and calculates your position based on the time that it has taken those signals to reach you.
To determine your speed, the GPS receiver measures the Doppler shift of the carrier frequency of the satellite signals. The Doppler shift is caused by the motion of the GPS receiver relative to the satellites. By analyzing this shift in frequency, the GPS receiver can calculate the speed of the receiver.