Originally Posted by
Yaatri
ROTFL
. Precious!
There you go. That's where your problem is.
I suspected that. ...
For an aircraft, what's relevant is the airspeed, that ois speed of the aircraft relative o the air. Passengers are interested in the ground speed, speed of the aircraft relative to ground, or to any other object fixed relative to ground, or in the same inertial frame as the earth. If air speed of the aircraft is 500 m.p.h., it's ground speed will be 600.m.p. in tail winds of 100 m.p.h. and 400 m.p.h. in head winds of the same speed. NOw think about what you claimed about there being no diffeence between ground speed and air speed. What you siad makes absolutely no sense.
The GPS doesn't know whether wind is pushing or engine is pushing sir. It just know one speed sir.
Originally Posted by
Yaatri
GPS measures ground speed. The receiver has to be calibrated to calculate the air speed.
Referenced to you earlier comment, what needs to be calibrated sir?