// *************************************************************************
/// @name Temperature access functions.
/// There are several ways to get the temperature, and several modeled
/// temperature values that can be retrieved. The U.S. Standard Atmosphere
/// temperature either at a specified altitude, or at sea level can be
/// retrieved. These two temperatures do NOT include the effects of any bias
/// or delta gradient that may have been supplied by the user. The modeled
/// temperature and the modeled temperature at sea level can also be
/// retrieved. These two temperatures DO include the effects of an optionally
/// user-supplied bias or delta gradient.
// @{
/// Returns the actual modeled temperature in degrees Rankine at a specified
/// altitude.
/// @param altitude The altitude above sea level (ASL) in feet.
/// @return Modeled temperature in degrees Rankine at the specified altitude.
public override double GetTemperature(double altitude)
{
double GeoPotAlt = GeopotentialAltitude(altitude);
double T;
if (GeoPotAlt >= 0.0)
{
T = StdAtmosTemperatureTable.GetValue(GeoPotAlt);
if (GeoPotAlt <= gradientFadeoutAltitude)
{
T -= temperatureDeltaGradient * GeoPotAlt;
}
}
else
{
// We don't need to add TemperatureDeltaGradient*GeoPotAlt here because
// the lapse rate vector already accounts for the temperature gradient.
T = StdAtmosTemperatureTable.GetValue(0.0) + GeoPotAlt * LapseRates[0];
}
T += temperatureBias;
if (GeoPotAlt <= gradientFadeoutAltitude)
{
T += temperatureDeltaGradient * gradientFadeoutAltitude;
}
return(T);
}
/// Returns the standard temperature in degrees Rankine at a specified
/// altitude.
/// @param altitude The altitude in feet above sea level (ASL) to get the
/// temperature at.
/// @return The STANDARD temperature in degrees Rankine at the specified
/// altitude.
public virtual double GetStdTemperature(double altitude)
{
double GeoPotAlt = GeopotentialAltitude(altitude);
if (GeoPotAlt >= 0.0)
{
return(StdAtmosTemperatureTable.GetValue(GeoPotAlt));
}
else
{
return(StdAtmosTemperatureTable.GetValue(0.0) + GeoPotAlt * LapseRates[0]);
}
}