JSBSim Flight Dynamics Model 1.0 (23 February 2013)
An Open Source Flight Dynamics and Control Software Library in C++
Public Member Functions

MSIS Class Reference

Inheritance diagram for MSIS:
Collaboration diagram for MSIS:

List of all members.

Public Member Functions

 MSIS (FGFDMExec *)
 Constructor.
 ~MSIS ()
 Destructor.
bool InitModel (void)
bool Run (bool Holding)
 Runs the MSIS-00 atmosphere model; called by the Executive Can pass in a value indicating if the executive is directing the simulation to Hold.
void UseExternal (void)
 Does nothing. External control is not allowed.

Detailed Description

Definition at line 229 of file FGMSIS.h.

Member Function Documentation

bool Run ( bool  Holding) [virtual]
Parameters:
Holdingif true, the executive has been directed to hold the sim from advancing time. Some models may ignore this flag, such as the Input model, which may need to be active to listen on a socket for the "Resume" command to be given.
Returns:
false if no error

Reimplemented from FGAtmosphere.

Definition at line 159 of file FGMSIS.cpp.

References FGPropagate::GetAltitudeASL(), FGFDMExec::GetAuxiliary(), FGLocation::GetLatitudeDeg(), FGLocation::GetLongitudeDeg(), FGFDMExec::GetPropagate(), and FGModel::Run().

{
  if (FGModel::Run(Holding)) return true;
  if (Holding) return false;

  double h = FDMExec->GetPropagate()->GetAltitudeASL();

  //do temp, pressure, and density first
  //if (!useExternal) {
    // get sea-level values
    Calculate(FDMExec->GetAuxiliary()->GetDayOfYear(),
              FDMExec->GetAuxiliary()->GetSecondsInDay(),
              0.0,
              FDMExec->GetPropagate()->GetLocation().GetLatitudeDeg(),
              FDMExec->GetPropagate()->GetLocation().GetLongitudeDeg());
    SLtemperature = output.t[1] * 1.8;
    SLdensity     = output.d[5] * 1.940321;
    SLpressure    = 1716.488 * SLdensity * SLtemperature;
    SLsoundspeed  = sqrt(2403.0832 * SLtemperature);
    rSLtemperature = 1.0/SLtemperature;
    rSLpressure    = 1.0/SLpressure;
    rSLdensity     = 1.0/SLdensity;
    rSLsoundspeed  = 1.0/SLsoundspeed;

    // get at-altitude values
    Calculate(FDMExec->GetAuxiliary()->GetDayOfYear(),
              FDMExec->GetAuxiliary()->GetSecondsInDay(),
              h,
              FDMExec->GetPropagate()->GetLocation().GetLatitudeDeg(),
              FDMExec->GetPropagate()->GetLocation().GetLongitudeDeg());
    //intTemperature = output.t[1] * 1.8;
    //intDensity     = output.d[5] * 1.940321;
    //intPressure    = 1716.488 * intDensity * intTemperature;
    //cout << "T=" << intTemperature << " D=" << intDensity << " P=";
    //cout << intPressure << " a=" << soundspeed << endl;
  //}

  Debug(2);

  return false;
}

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The documentation for this class was generated from the following files: