gSatWrapper Class Reference

Wrapper allowing compatibility between gsat and Stellarium/Qt. More...

#include <gSatWrapper.hpp>

Public Member Functions
	gSatWrapper (QString designation, QString tle1, QString tle2)
void	updateEpoch ()
	This operation update Epoch timestamp for gSatTEME object from Stellarium Julian Date. More...
void	setEpoch (double ai_julianDaysEpoch)
Vec3d	getTEMEPos ()
	This operation isolate gSatTEME getPos operation. More...
Vec3d	getSunECIPos ()
	Get Sun positions in ECI system. More...
Vec3d	getTEMEVel ()
	This operation isolate gSatTEME getVel operation. More...
Vec3d	getSubPoint ()
	This operation isolate getSubPoint method of gSatTEME object. More...
Vec3d	getAltAz ()
	This operation compute the coordinates in StelCore::FrameAltAz. More...
void	getSlantRange (double &ao_slantRange, double &ao_slantRangeRate)
	This operation compute the slant range (distance between the satellite and the observer) and its variation/seg. More...
int	getVisibilityPredict ()
	This operation predicts the satellite visibility contidions. More...
double	getPhaseAngle ()
gTime	getEpoch ()
void	calcObserverECIPosition (Vec3d &ao_position, Vec3d &ao_vel)
	This operation compute the observer ECI coordinates in Geocentric Ecuatorial Coordinate System (IJK) for the ai_epoch time. More...

Detailed Description

Wrapper allowing compatibility between gsat and Stellarium/Qt.

Definition at line 47 of file gSatWrapper.hpp.

Member Function Documentation

void gSatWrapper::calcObserverECIPosition	(	Vec3d &	ao_position,
		Vec3d &	ao_vel
	)

This operation compute the observer ECI coordinates in Geocentric Ecuatorial Coordinate System (IJK) for the ai_epoch time.

This position can be asumed as observer position in TEME framework without an appreciable error. ECI axis (IJK) are parallel to StelCore::EquinoxEQ Framework but centered in the earth centre instead the observer position.

References

Orbital Coordinate Systems, Part II Dr. T.S. Kelso http://www.celestrak.com/columns/v02n02/

Parameters

[out]	ao_position	Observer ECI position vector measured in Km
[out]	ao_vel	Observer ECI velocity vector measured in Km/s

Vec3d gSatWrapper::getAltAz

(

)

This operation compute the coordinates in StelCore::FrameAltAz.

Returns

Vect3d Vector with coordinates (meassured in km)

References

Orbital Coordinate Systems, Part II Dr. T.S. Kelso http://www.celestrak.com/columns/v02n02/

void gSatWrapper::getSlantRange	(	double &	ao_slantRange,
		double &	ao_slantRangeRate
	)

This operation compute the slant range (distance between the satellite and the observer) and its variation/seg.

Parameters

&ao_slantRange	Reference to a output variable where the method store the slant range measured in Km
&ao_slantRangeRate	Reference to a output variable where the method store the slant range variation in Km/s

Returns

void

Vec3d gSatWrapper::getSubPoint

(

)

This operation isolate getSubPoint method of gSatTEME object.

Returns

Vec3d Geographical coordinates
Latitude: Coord[0] measured in degrees
Longitude: Coord[1] measured in degrees
Altitude: Coord[2] measured in Km.

Vec3d gSatWrapper::getSunECIPos

(

)

Get Sun positions in ECI system.

Returns

Vec3d with ECI position.

Vec3d gSatWrapper::getTEMEPos

(

)

This operation isolate gSatTEME getPos operation.

Returns

Vec3d with TEME position. Units measured in Km.

Vec3d gSatWrapper::getTEMEVel

(

)

This operation isolate gSatTEME getVel operation.

Returns

Vec3d with TEME speed. Units measured in Km/s.

int gSatWrapper::getVisibilityPredict

(

)

This operation predicts the satellite visibility contidions.

This prediction can return 4 different states RADAR_SUN when satellite an observer are in the sunlit VISIBLE when satellite is in sunlit and observer is in the dark. Satellite could be visible in the sky. RADAR_NIGHT when satellite is eclipsed by the earth shadow. NOT_VISIBLE The satellite is under the observer horizon

Returns

1 if RADAR_SUN 2 if VISIBLE 3 if RADAR_NIGHt 3 if NOT_VISIBLE

References

Fundamentals of Astrodynamis and Applications (Third Edition) pg 898 David A. Vallado

void gSatWrapper::updateEpoch

(

)

This operation update Epoch timestamp for gSatTEME object from Stellarium Julian Date.

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

• /home/aw/devel/stellarium/0.15/plugins/Satellites/src/gSatWrapper.hpp