The International Standard Atmosphere (ISA) is a static atmospheric model of how the pressure, temperature, density, and viscosity of the Earth's atmosphere change over a wide range of altitudes or elevations.

International standard atmosphere in elevation -2000 to 30000 metre - pressure, temperature, density, viscosity, thermal conductivity and velocity of sound.

Since the real atmosphere never remains constant at any particular time or place, a hypothetical model must be employed as an approximation to what may be expected. This model is known as the standard atmosphere.

Also known as the ICAO Standard Atmosphere, ISA is a standard against which to compare the actual atmosphere at any point and time. The ISA is based on the following values of pressure, density, and temperature at mean sea level each of which decreases with increase in height:

Pressure, temperature, density, viscosity and speed of sound variation for the international standard atmosphere (ISA) can be calculated for a range of altitudes from sea level upward. This is done using an exact solution to the hydrostatic equation for a column of air.

The ICAO Standard Atmosphere or ISA is a standard against which to compare the actual atmosphere at any point and time. (ICAO = International Civil Aviation Organization). The real atmosphere differs from ISA in many ways.

2023年8月21日 · The International Standard Atmosphere (ISA) is a comparative benchmark representing normal atmospheric conditions irrespective of location, turbulence, moisture, etc. By the 1950s, the International Civil Aviation Organisation had the ISA encoded as uniform quantities at mean sea level.

The International Standardization Organization (ISO) has defined a standard atmosphere based on the model established by the ICAO in their Document 7488/2, Second Edition, 1964. The data in Table B.1 define the state variables at sea level (SL) and the gravitational acceleration at 45 northern latitude on which the potential altitude is based.

It is essential to construct a model atmosphere for calibration of instruments and aircraft testing. This model atmosphere is known as the International Standard Atmosphere shortened as ISO or ISA. This model extends to 32 kilometres above the surface of earth.

The International Standard Atmosphere (ISA) is an atmospheric model of how the pressure, temperature, density, and viscosity of the Earth's atmosphere change over a wide range of altitudes. It consists of tables of values at various altitudes, plus some formulas by which those values were derived.