afpt (version 1.0.0)

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)

Arguments

altitude

(geopotential) altitude in meters above sealevel.

Value

Numerical value or array for the density in kg/m3

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

# NOT RUN {
altitude <- seq(0,3000,100) # meters above sealevel
density <- altitude2density(altitude)

# }