I saw it on the History Channel... three giagantic spheres looming over the 
planet Earth, and the narrator said, "GPS is based on the intersection of 
three spheres from three satellite transmissions, at two points."

All I did was calculate those two points.  ALRIGHT?  Include yourself among 
the others in "instead on relying on others."

I made a life out of Bouguer anomalies and corrections.  WHO NEEDS THEM?

-- 
Jon G.
jon8338@peoplepc.com
http://mypeoplepc.com/members/jon8338/math/index.html


"junoexpress" <MTBrenneman@gmail.com> wrote in message 
news:b4c25598-8086-4060-b44c-7a5e6f0e7455@i76g2000hsf.googlegroups.com...
On Sep 5, 1:35 pm, "Jon G." <jon8...@peoplepc.com> wrote:
> Here is the math that calculates position from 3 satellites. There are 2
> points of intersection of 3 spheres of known radii, which are determined 
> by
> time-stamped transmissions from the satellites.
>
> http://www.geocities.com/jongiff2000/GPS_math.xls
>
> Jon Giffen
> jon8...@peoplepc.com


Pick up a book (see Spilker, Tsui, or Enge & Misra) and do some
reading instead of relying on others or the Internet solely for your
info. As you are hopefully learning, this is not a very reliable
strategy.

But if you find this all too taxing for your mind, then at last read
http://en.wikipedia.org/wiki/Pseudorange
(*read*, don't *skim*, got it)

Cheers Quaker,

M