How is the calculation done to detect the position of the globle.
2006-10-30 14:06:22 · 3 answers · asked by Asanga J 1 in Science & Mathematics ➔ Astronomy & Space
Basically, each GPs satellite broadcasts its time signal and its location. You receiver essentially does a reverse triangulation to find out the location of itself. Since there are three position variables plus time, a minimum of 4 satellites' signals is needed to do the position calculation.
I use the term reverse triangulation, since you don't know where you are, but you know where the satellites are, which is reversed from normal triangulation, where you're trying to figure out where something else is.
Lots of reading here:
http://www.navcen.uscg.gov/gps/geninfo/default.htm
2006-10-30 14:14:05 · answer #1 · answered by arbiter007 6 · 0⤊ 0⤋
We're in outer space. Floating. Durrr.
2006-10-30 14:07:48 · answer #2 · answered by Harsh Noise Wall 4 · 0⤊ 0⤋
By sattelights which contain atomic clocks ... go to howstuffworks.com
2006-10-30 14:14:03 · answer #3 · answered by aaron 5 · 0⤊ 0⤋