Home > Altitude
Altitude is the elevation of an object from a known level or datum, called zero level. Most often this level is defined as the absolute sea level, but it can vary. In aviation, the term altitude is used to describe elevation above mean sea level, the term height refers to elevation above a ground reference point and the term flight level is the elevation according to a standard pressure altimeter setting.
Atmospheric pressure decreases with altitude.
In North America and the UK altitude is usually measured in feet. In continental Europe and other parts of the world altitude is measured in metres.
- High altitude = 1500m – 3500m
- Very High altitude = 3500m – 5500m
- Extreme altitude = 5500m – above
- Troposphere — 8 km (above poles) – 18 km (above equator).
- Tropopause
- Stratosphere — 10km (above poles) 50 km (above equator),contains the Ozone layerThe ozone layer is that part of the Earth's stratosphere which contains ozone. The total quantity of ozone in the ozone layer is not very large; if just the ozone were compressed to the pressure of the air at sea level, it would be only a few millimeters
- MesosphereThe mesosphere is the layer of the Earth's atmosphere that is directly above the stratosphere and directly below the thermosphere. The mesosphere is located about 50-80/85km above Earth's surface. Within this layer, temperature decreases with increasing a — 50 km – 80 km
- ThermosphereThe thermosphere is the layer of the Earth's atmosphere directly above the mesosphere and directly below the exosphere. Within this layer, ultraviolet radiation causes ionization. see also: ionosphere) The thermosphere, named from the Greek thermo for hea — 100–200 km (1000°–1500° KThe kelvin (symbol: K is the SI unit of temperature, and is one of the seven SI base units. It is defined by two facts: zero kelvin is absolute zero (when molecular motion stops), and one kelvin is the fraction 1/273. 16 of the thermodynamic temperature o)
- ExosphereThe exosphere is the uppermost layer of the atmosphere. On Earth, its lower boundary is estimated at 500 km to 1000 km above the Earth's surface, and its upper boundary at about 10,000 km. It is only from the exosphere that atmospheric gases, atoms, and m — 500 km – 10,000km (outer space)
See Also
- Altitude sicknessAltitude sickness (also: acute mountain sickness (AMS) or altitude illness is a pathological condition that is caused by lack of adaptation to high altitudes. It commonly occurs above 2,440 metres (8,000 feet). The symptoms are headaches, fatigue, shortne
In astronomyAstronomy which etymologically means " law of the stars," (from Greek: + nomos) is a science involving the observation and explanation of events occurring outside Earth and its atmosphere. It studies the origins, evolution, physical and chemical propertie and surveyingSurveying is concerned with the accurate measurement and position of points on the Earth's surface, and to the establishment of boundaries. It basically achieves this by measuring the relative horizontal and vertical position of points on the ground, aide, altitude is one of the two coordinates of the horizontal coordinate system, and refers to the vertical angle from the horizon. The other coordinate is azimuth, which refers to the horizontal angle from the north.
Celestial coordinate system
In geometry, an altitude of a triangle is a line passing through one vertex and being perpendicular to the opposite side. See altitude (triangle).
