Download or view MarsAtmosphereOld.frink in plain text format
/** This is a simple model of Mars's atmosphere provided by NASA.
This is obsolete and should be replaced by the much better
MarsAtmosphere.frink
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.
*/
class MarsAtmosphereOld
{
/** 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 MarsAtmosphereOld.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 20152 days, 21 hours, 44 minutes ago.