atmoslapse - Use Lapse Rate Atmosphere model

Syntax

Description

[T, a, P, rho] = atmoslapse(height, g, heatRatio, characteristicGasConstant, lapseRate, heightTroposphere, heightTropopause, density0, pressure0, temperature0) implements the mathematical representation of the lapse rate atmospheric equations for ambient temperature, pressure, density, and speed of sound for the input geopotential altitude. To customize this atmospheric model, specify the atmospheric properties in the function input.

The function holds temperature and pressure values below the geopotential altitude of 0 km and above the geopotential altitude of the tropopause.

Input Arguments

height	Array of m-by-1 geopotential heights, in meters.
g	Scalar of acceleration due to gravity, in meters per second squared.
heatRatio	Scalar of specific heat ratio.
characteristicGasConstant	Scalar of characteristic gas constant, in joule per kilogram-kelvin.
lapseRate	Scalar of lapse rate, in kelvin per meter.
heightTroposphere	Scalar of height of troposphere, in meters.
heightTropopause	Scalar of height of tropopause, in meters.
density0	Scalar of air density at mean sea level, in kilograms per meter cubed.
pressure0	Scalar of static pressure at mean sea level, in pascal.
temperature0	Scalar of absolute temperature at mean sea level, in kelvin.

Output Arguments

T	Array of m-by-1 temperatures, in kelvin.
a	Array of m-by-1 speeds of sound, in meters per second. The function calculates speed of sound using a perfect gas relationship.
P	Array of m-by-1 pressures, in pascal.
rho	Array of m-by-1 densities, in kilograms per meter cubed. The function calculates density using a perfect gas relationship.

Examples

Calculate the atmosphere at 1000 m with the International Standard Atmosphere input values:

[T, a, P, rho] = atmoslapse(1000, 9.80665, 1.4, 287.0531, 0.0065, ...
    11000, 20000, 1.225, 101325, 288.15 )

T =

  281.6500

a =

  336.4341

P =

  8.9875e+004

rho =

    1.1116

References

U.S. Standard Atmosphere, 1976, U.S. Government Printing Office, Washington, D.C.

See Also

atmoscira | atmoscoesa | atmosisa | atmosnonstd | atmospalt

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