Ralph Sansbury wrote:

DOPPLER TEST OF LIGHT SPEED DELAY FROM DISTANT SPACECRAFT
Doppler Test Shows Light Speed Does Not Extrapolate Beyond 1 Minute

An analysis of Doppler data produced by the Pioneer 10 spacecraft
shows that the speed of light delay from the spacecraft when it was
billions of miles and supposedly hours away was, despite this great
distance, actually less than a minute away.

Folks should read at the papers
http://www.google.com/search?q=pione...te%3AarXiv.org