AtmJ70 Class Reference

Class implementing the Jacchia 1970 atmospheric density model. More...

#include <sc_atmJ70.h>

Public Member Functions
	AtmJ70 (void)
	Constructor.
	AtmJ70 (double aP, double f, double fHat, double fHat400)
	Constructor with parameters.
	AtmJ70 (double jD, int kTiming, int kSigma, const char fileName[])
	Constructor using solar flux model. More...
bool	Initialize (double jD, int kTiming, int kSigma, const char fileName[])
	Initialize. More...
void	Update (double jD, ml_matrix rECI)
	Update the model. More...
double	GetDensity (void)
	Get the density.
double	GetNumberDensityOfHelium (void)
	Get the number density of helium.
double	GetNumberDensityOfArgon (void)
	Get the number density of argon.
double	GetNumberDensityOfNitrogen (void)
	Get the number density of nitrogen.
double	GetNumberDensityOfOxygen (void)
	Get the number density of oxygen.
double	GetNumberDensityOfMonatomicOxygen (void)
	Get the number density of monatomic oxygen.
double	GetTemperature (void)
	Get the temperature.
double	GetMeanMolecularMass (void)
	Get the mean molecular mass.

Detailed Description

Class implementing the Jacchia 1970 atmospheric density model.

Reference: Models of the Earth's Atmosphere (90 to 2500 kM) NASA SP-8021. Roberts, C.E. Jr, "An Analytic Model for Upper Atmosphere Densities Based Upon Jacchia's 1970 Models", Celestial Mechanics Vol. 4, 1971, pp. 368-377.

Constructor & Destructor Documentation

AtmJ70()

AtmJ70::AtmJ70	(	double	jD,
		int	kTiming,
		int	kSigma,
		const char	fileName[]
	)

Constructor using solar flux model.

Construct the J70 model.

Parameters

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

Member Function Documentation

Initialize()

bool AtmJ70::Initialize	(	double	jD,
		int	kTiming,
		int	kSigma,
		const char	fileName[]
	)

Initialize.

Initialize the J70 model.

Parameters

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

Referenced by AtmJ70ToGround::Initialize().

Update()

void AtmJ70::Update	(	double	jD,
		ml_matrix	rECI
	)

Update the model.

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

Parameters

jD	Julian date
rECI	ECI position in km

References jd_to_day_number(), RADIANS_TO_DEGREES, RADIUS_EARTH, and sun_vector().

Referenced by AtmJ70ToGround::Update().