Altitude
In meteorology, the measure of a height of an airborne object in respect to a constant pressure surface or above mean sea level.
Meteorology / Meteorologist
The science and study of the atmosphere and atmospheric phenomena. Various areas of meteorology include agricultural, applied, astrometerology, aviation, dynamic, hydrometeorology, operational, and synoptic, to name a few. A scientist who studies the atmosphere and atmospheric phenomena.
Constant Pressure Surface
A surface along which the atmospheric pressure is equal everywhere.
Sea Level
The height or level of the sea surface at any time. It is used as a reference for elevations above and below.