Altimeter Calibration Height

On Wed, 07 Mar 2007 21:37:53 -0800, TheSmokingGnu wrote:

The bottom of the landing gear? The height of the static port?

If you want to complicate your question ask about the other end of the
measurement, MSL.

From where do they measure MSL? Sea surface topography is constantly
changing. Do you measure from the tops of the waves? Bottoms? High tide?
Average tide? Average tide in the Pacific or average tide in the Atlantic?
How do you measure MSL in Panama? How do you get an average when currents,
air pressure variations, temperature and salinity variations are constantly
in flux? What about the melting and freezing of snow and glaciers? How
much time do you need to create this average?


--
Dallas