[snips]
"zigoteau" wrote in message
om...
Bob Cain wrote in message
...
Mine, which involves no approximation, yields:

Vp(d,t) = Vd(t - (d - Sd(t-d/c))/c)

I am sorry, Bob, but the second equation does involve an approximation.

Zigoteau.

I agree completely, and I would like to point out that if you evaluate the
above equation at d=0 you get an result identical to my equation (8) in my
analysis at
http://www.silcom.com/~aludwig/Physi...on/dopdist.htm, which has
been posted for quite a while now. Rod Elliot presented the same equation
before I did. I present this equation as an approximate analysis, but show
that it is quite accurate. I also show that this equation is completely
equivalent to the good old fashioned "Doppler distortion" that folks have
been using for years. Just follow the link under "interesting issues" for a
proof of this statement. As far as I am aware you are not claiming your
analysis is novel, Zigoteau, so I don't mean this as a personal criticism.
I just want to set the record straight for people not familiar with the
history.
Art Ludwig