README.md

ISA_package

This ISA package contains many functions for calculating many parameters about the International Stardard Atmosphere (ISA).

Equations extracted from Wikipedia and recalculated personally for avoiding errors.

Programmed for MATLAB in MATLAB 2012b.

ISA.m

International Standard Atmosphere (ISA)
This function models the International Standard Atmosphere (ISA) between 0 and 47000 m from the surface.

INPUT DATA

z --> Altitude (m).

OUTPUT DATA

T --> Temperature (K)  
P --> Pressure (Pa)  
rho --> Density (kg/m^3)  

altitudeCalc.m

Altitude Calculation Function
This function calculates the altitude in which the condition stablished as a parameter is correct.

INPUT DATA

n --> String which can be:
	'T' --> The parameter is a temperature (K).
	'P' --> The parameter is a pressure (Pa).
	'rho' --> The parameter is a density (kg/m^3).
v --> Value of n in the units specified above (IS).

OUTPUT DATA

d --> Altitude in m that matches the specified condition.

ISA_P.m

Pressure Calculation Function for the International Standard Atmosphere (ISA)
This function calculates the pressure at a specified altitude.

INPUT DATA

z --> Altitude (m)

OUTPUT DATA

P --> Pressure (Pa)

ISA_rho.m

Density Calculation Function for the International Standard Atmosphere (ISA)
This function calculates the density at a specified altitude.

INPUT DATA

z --> Altitude (m)

OUTPUT DATA

rho --> Density (kg/m^3)

ISA_T.m

Temperature Calculation Function for the International Standard Atmosphere (ISA)
This function calculates the temperature at a specified altitude.

INPUT DATA

z --> Altitude (m)

OUTPUT DATA

T --> Temperature (K)

parmCalc.m

Parameter function for ISA parameters
This function returns the value of the parameters used in the ISA equations as function of altitude.

INPUT DATA

z --> Altitude (m).

OUTPUT DATA

lambda --> Temperature gradient (K/m).
T --> Reference temperature at a specified altitude (K).
P --> Reference pressure at a specified altitude (P).
rho --> Reference density at a specified altitude (kg/m^3).

realNum.m

Real Number Selection Function
This function selects the real numbers of an array of 1 row and returns only that real values, eliminating those with imaginary part.

INPUT DATA

m --> Complex number 1 row array

OUTPUT DATA

n --> Real number 1 row array