DOPPLER EFECTE ?
My test
bulb -----pipe -----camera --------> 30 km/s
Your Example
airplane ----30 km/s + 100 m/s -->.......station -----> 30 km/s
bulb ( source ) and camera ( sensor ) are roped to the Earth
bulb and camera have got the same velocity 30 km/s !!!
We not have typical doppler shift
IT IS APPARENT DISTANCE SHIFT ???
1 please see what is it apparent point
>>> click animation Below imortant picture
Earth and Sun have got the same velocity . Sun started ring 1 wave in point 1 ( wave 1 is going C respect to point where signal started) after 5-6 minutes Earth and Sun Will be in new point 4
Earth will register signal that started in poin 1 ( in past )
link to above image
http://2.bp.blogspot.com/-yrD2uFLkznM/Ua6hkakJkII/AAAAAAAAA80/9O4Y-yFYbsY/s1600/222.JPG important info to above piture
Point source S is radiating light equally in all directions. The amount passing through an area A varies with the distance of the surface from the light.
DOPPLER
ORAC DO YOU UNDERSTAND BELOW PICTURE
(
frequency Hz and Amplitude of the signal it is not two the same problems --- if the source and sensor have got the same velocity we will register only !!! amplitude of signal shift (graph shape )!!!)
link to above picture
http://1.bp.blogspot.com/-wvjTus-1msQ/UlMZg_mrSYI/AAAAAAAABMk/ZEZHIZQA6Sg/s1600/23.JPG ELECTRIC TEST ZERO ( resistance of wire /or /and signal shape )
link to above picture
http://3.bp.blogspot.com/-FTEj6Y-2f9U/UlOg3Q6y7II/AAAAAAAABM0/tkyYFv7oc4c/s1600/24.JPG 
