Use International Standard Atmosphere model
implements the mathematical representation of the International Standard Atmosphere values
for ambient temperature, pressure, density, and speed of sound for the input geopotential
This function assumes that temperature and pressure values are held constant for both:
Below the geopotential altitude of 0 km
Above the geopotential altitude of the tropopause (at 20 km)
Calculate International Standard Atmosphere at One Height
Calculate the International Standard Atmosphere at 1000 m.
[T, a, P, rho] = atmosisa(1000)
T = 281.6500
a = 336.4341
P = 8.9875e+04
rho = 1.1116
Calculate International Standard Atmosphere at Multiple Heights
Calculate the International Standard Atmosphere at 1000, 11,000, and 20,000 m.
[T, a, P, rho] = atmosisa([1000 11000 20000])
T = 1×3 281.6500 216.6500 216.6500
a = 1×3 336.4341 295.0696 295.0696
P = 1×3 104 × 8.9875 2.2632 0.5475
rho = 1×3 1.1116 0.3639 0.0880
height — Geopotential heights
Geopotential heights, specified as an m-by-m array.
T — Temperatures
Temperatures, returned as an m-element array, in kelvin.
a — Speeds of sound
Speeds of sound, returned as an m-element array, in meters per second. The function calculates speed of sound using a perfect gas relationship.
P — Pressures
Pressures, returned as an m-element array, in pascal.
rho — Densities
Densities, returned as an m-element array, in kilograms per meter cubed. The function calculates density using a perfect gas relationship.
 U.S. Standard Atmosphere, 1976. U.S. Government Printing Office, Washington, D.C.