Which of the following effects must be accounted for to make accurate measurements with global positioning system satellites?

Question

Quizplus · Accepted Answer

To make accurate measurements with global positioning system (GPS) satellites, all of the following effects must be accounted for: light travel times, special relativity, and gravity. Light travel times must be taken into consideration because the GPS signal travels at the speed of light, which means that even a small delay can result in a significant positional error. The effects of special relativity must also be taken into account because the GPS satellites are moving at high speeds relative to the surface of the Earth, which causes time dilation effects that can lead to positional errors if not accounted for. Finally, gravity must be accounted for because the GPS signal must travel through the Earth's atmosphere, which causes delay and refraction effects that can also lead to positional errors if not taken into consideration.

Which of the Following Effects Must Be Accounted for to Make