ionoSpherical.cpp File Reference

Data Structures
struct	SphBasis

Functions
int	configIonModelSphhar (Trace &trace)
	configures the spherical harmonics model.
bool	ippCheckSphhar (GTime time, VectorPos &ionPP)
	rotates the Ionosphere piercing point time: I time of observations (to update the rotation matrix) IPP: I Ionospheric piercing point to be updated
double	ionCoefSphhar (Trace &trace, int ind, IonoObs &obs, bool slant)
	Evaluates spherical harmonics basis functions int ind I obs I Ionosphere measurement struct latIPP - Latitude of Ionosphere Piercing Point lonIPP - Longitude of Ionosphere Piercing Point angIPP - Angular gain for Ionosphere Piercing Point.
double	ionVtecSphhar (Trace &trace, GTime time, VectorPos &ionPP, int layer, double &var, KFState &kfState)
	Estimate Ionosphere VTEC using Spherical Cap Harmonic models gtime_t time I time of solutions (not useful for this one Ion_pp I Ionosphere Piercing Point layer I Layer number vari O variance of VTEC.
void	ionOutputSphcal (Trace &trace, KFState &kfState)
bool	getEpcSsrIono (Trace &trace, GTime time, SSRAtmGlobal &atmGlob, Vector3d &rRec, AzEl &azel, double &iono, double &var)
bool	getIGSSSRIono (Trace &trace, GTime time, SSRAtm &ssrAtm, Vector3d &rRec, AzEl &azel, double &iono, double &var)

Function Documentation

configIonModelSphhar()

int configIonModelSphhar

(

Trace &

trace

)

configures the spherical harmonics model.

Specifically it initializes: shar_valid time validity of a rotation matrix (the rotation matrix will chase the sun position) Sph_Basis_list List of ionosphere basis time: I time of observations (to update the rotation matrix) IPP: I Ionospheric piercing point to be updated

Since the spherical harmonic model has global validity, the check always return 1

Author: Ken Harima @ RMIT 29 July 2020

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getEpcSsrIono()

bool getEpcSsrIono	(	Trace &	trace,
		GTime	time,
		SSRAtmGlobal &	atmGlob,
		Vector3d &	rRec,
		AzEl &	azel,
		double &	iono,
		double &	var )

Parameters

trace	Debug trace
time	time of ionosphere correction
atmGlob	SSR atmospheric correction
rRec	receiver position
azel	Satellite azimuth and elevation
iono	Ionosphere delay (in TECu)
var	Ionosphere variance

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getIGSSSRIono()

bool getIGSSSRIono	(	Trace &	trace,
		GTime	time,
		SSRAtm &	ssrAtm,
		Vector3d &	rRec,
		AzEl &	azel,
		double &	iono,
		double &	var )

Parameters

trace	Debug trace
time	time of ionosphere correction
ssrAtm	SSR atmospheric correction
rRec	receiver position
azel	receiver position
iono	Ionosphere delay (in TECu)
var	Ionosphere variance

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ionCoefSphhar()

double ionCoefSphhar	(	Trace &	trace,
		int	ind,
		IonoObs &	obs,
		bool	slant )

Evaluates spherical harmonics basis functions int ind I obs I Ionosphere measurement struct latIPP - Latitude of Ionosphere Piercing Point lonIPP - Longitude of Ionosphere Piercing Point angIPP - Angular gain for Ionosphere Piercing Point.

int slant I 0: coefficient for VTEC, 1: coefficient for STEC

Parameters

ind	Basis function number
obs	Ionospheric observation metadata
slant	apply slant factor, false: coefficient for VTEC, true: coefficient for STEC

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ionOutputSphcal()

void ionOutputSphcal	(	Trace &	trace,
		KFState &	kfState )

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ionVtecSphhar()

double ionVtecSphhar	(	Trace &	trace,
		GTime	time,
		VectorPos &	ionPP,
		int	layer,
		double &	var,
		KFState &	kfState )

Estimate Ionosphere VTEC using Spherical Cap Harmonic models gtime_t time I time of solutions (not useful for this one Ion_pp I Ionosphere Piercing Point layer I Layer number vari O variance of VTEC.

returns: VETC at piercing point

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ippCheckSphhar()

bool ippCheckSphhar	(	GTime	time,
		VectorPos &	ionPP )

rotates the Ionosphere piercing point time: I time of observations (to update the rotation matrix) IPP: I Ionospheric piercing point to be updated

Since the spherical harmonic model has global validity, the check always return 1

Author: Ken Harima @ RMIT 29 July 2020

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