Quote:
Originally Posted by stillsearching
Whats this mean? I didn't understand a word you just said. : P
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The gauge would have to sample station pressure(which is atmospheric pressure uncorrected for altitude), ambient temps and humidity at least every minute to give a good average.
Atmospheric pressure changes with elevation changes. If you drop 200 ft then the pressure would also rise .2" or thereabouts.
Density altitude is a measurement of station pressure, temperature and humidity combined to calculate what altitude the current air density is equal to.
Here in Atlanta the elevation is around 1000 ft ASL, but I have seen DA's as high as 3700 ft.