Register to reply

Calculate Accuracy of GPS?

by godtripp
Tags: accuracy
Share this thread:
Nov22-11, 12:41 AM
P: 54

I need to calculate how accurate a GPS system is using only Special Relativity and a very basic knowledge of GR (without tensors...which is limited).

I'm not sure where to begin however... where does the uncertainty in the measurement come from? How can I calculate the size of the uncertainty of a GPS position?

Any references or insight would be GREATLY APPRECIATED.

Thanks PF,

Phys.Org News Partner Science news on
Experts defend operational earthquake forecasting, counter critiques
EU urged to convert TV frequencies to mobile broadband
Sierra Nevada freshwater runoff could drop 26 percent by 2100
Nov24-11, 03:53 AM
P: 611
You can pretty much calculate the discrepancy using the following equations and quantities-

Time dilation due to gravity (GR)-


where [itex]M=Gm/c^2[/itex]

Time dilation due to velocity (SR)-


Quantities required-
Earth's mass
Earth's (mean) radius
satellite's altitude
satellite's velocity

Register to reply

Related Discussions
What dose d-8 mean in Fortran? Programming & Computer Science 3
DAC accuracy Electrical Engineering 2
Calculate the resolution in linear travel of the tape Introductory Physics Homework 1
CCD accuracy Introductory Physics Homework 0
Newton assumed mass of a light particle is approaching zero General Physics 2