calculating doppler values of GPS satellites using ephemirs data

Hi,

I am trying to calculate the azimuth, elevation, pseudo range and the
doppler values of gps satellites.
I have figured out how to calculate to azimuth, elevation and the pseudo
range w.r.t to a known reference location (help from Sam's web page).
But I still haven't figured out how to calculate the doppler values.

Can somebody explain the procedure to calcualte the doppler values of the
GPS satellites w.r.t to a known referene location?

Thanks in advance.
Dee

__jakal__ wrote:

Looking at
http://scienceworld.wolfram.com/physics/DopplerEffect.html

it is simply (not all that simple) a matter of calculating the
*relative* velocity of the satellite in orbit and the observer.

See: http://relativity.livingreviews.org/open?pubNo=lrr-2003-1&page=node9.html