AtmJ70ToGround Class Reference

Combined J70 and standard atmosphere model. More...

#include <sc_atmj70toground.h>

Public Member Functions
	AtmJ70ToGround (void)
	Default constructor.
bool	Initialize (double jD, int kTiming, int kSigma, const char fileName[])
	Initialize both the standard atmosphere and J70 models. More...
void	Update (const ml_matrix &rECI, double jD)
	Update the density model using a new ECI location and Julian date. More...
double	GetTemperature (void)
	Return the atmonspheric temperature in K.
double	GetDensity (void)
	Return the atmospheric density in kg/m^3.
double	GetSpeedOfSound (void)
	Return the speed of sound in m/s.
double	GetKinematicViscosity (void)
	Return the speed of sound in m/s.
double	GetPressure (void)
	Return the pressure in N/m^2.

Detailed Description

Combined J70 and standard atmosphere model.

The standard atmosphere is used up to 80 km, and the J70 model is used above. Uses the StdAtm and AtmJ70 classes.

Member Function Documentation

Initialize()

bool AtmJ70ToGround::Initialize	(	double	jD,
		int	kTiming,
		int	kSigma,
		const char	fileName[]
	)

Initialize both the standard atmosphere and J70 models.

Parameters

jD	Julian date
kSigma	Error bars for J70. Can be 0, 1 or 2 (nominal, +2 sig, -2 sig)
kTiming	Timing of solar cycle for J70, can be 0, 1 or 2 (nominal, early, late)
fileName	Path to file containing J70 solar data

Returns

A flag indicating successful initialization of J70

References StdAtm::Initialize(), AtmJ70::Initialize(), and sc_warn().

Update()

void AtmJ70ToGround::Update	(	const ml_matrix &	rECI,
		double	jD
	)

Update the density model using a new ECI location and Julian date.

Parameters

rECI	ECI position in km
jD	Julian date

References AtmJ70::GetDensity(), StdAtm::GetDensity(), StdAtm::GetPressure(), StdAtm::GetSpeedOfSound(), AtmJ70::GetTemperature(), StdAtm::GetTemperature(), RADIUS_EARTH, StdAtm::Update(), and AtmJ70::Update().