if you mount an altimeter at the 100' level of a 200' tower,
equiped it with a static tube 100' long,
that the altimeter will read the same regardless if end of the tube,
is stationed at the top or bottom of the tower.

That is a mostly true statement. Conditions inside the tube could
differ
from ambient conditions, this would engender a teeny (but real)
difference
in readings.

Jose

You mean like pressure loss of the long length or something?


Humidity or moisture content comes most readily to my mind.

Peter