afpt (version 1.1.0.4)

altitude2density: Compute density in International Standard Atmopshere

Description

This function computes the air density at a specified altitude in the Troposphere of the International Standard Atmosphere.

Usage

altitude2density(altitude = 0)

Value

Numerical value or array for the density in kg/m3

Arguments

altitude

(geopotential) altitude in meters above sealevel.

Author

M. Klein Heerenbrink

Details

$\rho ={\rho }_0(1+a\frac{h}{T_0}{)}^{-\frac{g_0}{Ra}+1}$ with ${\rho }_0$ = 1.225 kg/m3, $a$ = -0.0065 K/m, $h$ geopotential altitude in meters, $g_0$ = 9.80665 m/s2, and $R$ = 287.1 J/Kg/K.

References

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

Examples

altitude <- seq(0,3000,100) # meters above sealevel
density <- altitude2density(altitude)