Download or view MarsAtmosphere.frink in plain text format
/** This is a simple model of Mars's atmosphere for modeling re-entry.
See:
https://www.grc.nasa.gov/WWW/K-12/airplane/atmosmrm.html
These equations give nonsensical results (e.g. negative Kelvin
temperatures) above 100 km.
A better option might be to find the Mars-GRAM data files which
require getting through broken NASA webpages.
*/
class MarsAtmosphere
{
/** Calculates temperature, pressure, and density of Mars's atmosphere at
the given altitude.
parameters:
altitude
returns:
[temperature, pressure, density]
*/
class getTPD[altitude] :=
{
if altitude < 7000 m
t = C[-31 - 0.000998 (altitude/m)]
else
t = C[-23.4 - 0.00222 (altitude/m)]
if t < 0 K
t = 0 K
p = .699 kPa exp[-0.00009 * (altitude/m)]
if t > 0 K
rho = (p / kPa) / (.1921 m^3/kg (t/K))
else
rho = 0 kg/m^3
return [t, p, rho]
}
}
Download or view MarsAtmosphere.frink in plain text format
This is a program written in the programming language Frink.
For more information, view the Frink
Documentation or see More Sample Frink Programs.
Alan Eliasen was born 19979 days, 21 hours, 40 minutes ago.