doubledtr{};//!< Relativistic clock correction term
// Time
int32_tWN{};//!< Week number
int32_ttow{};//!< Time of Week
// satellite positions
doublesatpos_X{};//!< Earth-fixed coordinate x of the satellite [m]. Intersection of the IERS Reference Meridian (IRM) and the plane passing through the origin and normal to the Z-axis.
doublesatpos_Y{};//!< Earth-fixed coordinate y of the satellite [m]. Completes a right-handed, Earth-Centered, Earth-Fixed orthogonal coordinate system.
doublesatpos_Z{};//!< Earth-fixed coordinate z of the satellite [m]. The direction of the IERS (International Earth Rotation and Reference Systems Service) Reference Pole (IRP).
// Satellite velocity
doublesatvel_X{};//!< Earth-fixed velocity coordinate x of the satellite [m]
doublesatvel_Y{};//!< Earth-fixed velocity coordinate y of the satellite [m]
doublesatvel_Z{};//!< Earth-fixed velocity coordinate z of the satellite [m]
protected:
charSystem{};//!< Character ID of the GNSS system. 'G': GPS. 'E': Galileo. 'B': BeiDou