Class AttitudeConverter


  • public class AttitudeConverter
    extends java.lang.Object
    Convert a given set of heliotropic angles into a quaternion
    • Method Summary

      All Methods Static Methods Concrete Methods 
      Modifier and Type Method Description
      static HeliotropicAnglesRates getHeliotropicAnglesRates​(long gt, Attitude att)
      Calculate the heliotropic angles and rates for a given attitude
      static Quaterniond[] getQuaternionAndRate​(long gt, HeliotropicAnglesRates h)
      Converts heliotropic angles and rates to an attitude quaternion and its derivative
      static Quaterniond[] heliotropicToQuaternions​(double lSun, double xi, double nu, double omega, double lSunDot, double nuDot, double omegaDot)
      Converts heliotropic angles and rates to an attitude quaternion and its derivative
      static double[] heliotropicToQuaternionSrsRates​(double lSun, double xi, double nu, double omega, double lSunDot, double nuDot, double omegaDot)
      Converts heliotropic angles and rates to the attitude quaternion components and the inertial rates in SRS
      • Methods inherited from class java.lang.Object

        clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
    • Constructor Detail

      • AttitudeConverter

        public AttitudeConverter()
    • Method Detail

      • heliotropicToQuaternions

        public static Quaterniond[] heliotropicToQuaternions​(double lSun,
                                                             double xi,
                                                             double nu,
                                                             double omega,
                                                             double lSunDot,
                                                             double nuDot,
                                                             double omegaDot)
        Converts heliotropic angles and rates to an attitude quaternion and its derivative
        Parameters:
        lSun - longitude of the nominal sun [rad]
        xi - solar aspect angle [rad]
        nu - revolving phase angle [rad]
        omega - scan phase angle [rad]
        lSunDot - time derivative of lSun [rad/day]
        nuDot - time derivative of nu [rad/day]
        omegaDot - time derivative of omega [rad/day]
        Returns:
        an array of two quaternions, q (the attitude quaternion) and qDot (the time derivative of q, per day)
      • heliotropicToQuaternionSrsRates

        public static double[] heliotropicToQuaternionSrsRates​(double lSun,
                                                               double xi,
                                                               double nu,
                                                               double omega,
                                                               double lSunDot,
                                                               double nuDot,
                                                               double omegaDot)
        Converts heliotropic angles and rates to the attitude quaternion components and the inertial rates in SRS
        Parameters:
        lSun - longitude of the nominal sun [rad]
        xi - solar aspect angle [rad]
        nu - revolving phase angle [rad]
        omega - scan phase angle [rad]
        lSunDot - time derivative of lSun [rad/day]
        nuDot - time derivative of nu [rad/day]
        omegaDot - time derivative of omega [rad/day]
        Returns:
        double[] array {qx, qy, qz, qw, rateX, rateY, rateZ} with rates in [rad/day]
      • getQuaternionAndRate

        public static Quaterniond[] getQuaternionAndRate​(long gt,
                                                         HeliotropicAnglesRates h)
        Converts heliotropic angles and rates to an attitude quaternion and its derivative
        Parameters:
        gt - GaiaTime
        h - heliotropic angles and their rates in [rad] and [rad/day]
        Returns:
      • getHeliotropicAnglesRates

        public static HeliotropicAnglesRates getHeliotropicAnglesRates​(long gt,
                                                                       Attitude att)
        Calculate the heliotropic angles and rates for a given attitude
        Parameters:
        gt - Time for the attitude
        att - attitude
        Returns: