Package org.orekit.models.earth.atmosphere

Enum NRLMSISE00.LocalSolarTimeMode

  • All Implemented Interfaces:
    Serializable, Comparable<NRLMSISE00.LocalSolarTimeMode>
    Enclosing class:
    NRLMSISE00
    public static enum NRLMSISE00.LocalSolarTimeMode
extends Enum<NRLMSISE00.LocalSolarTimeMode>
    Convention used to compute the local solar time driving the diurnal density terms.

    The NRLMSISE-00 empirical coefficients were fitted using mean local solar time (the reference Fortran driver defines it as stl = sec/3600 + glong/15, i.e. UT plus geographic longitude, with no equation of time). The independent variable fed to the model must therefore use the same convention it was calibrated with; feeding apparent solar time (the true Sun hour angle, which includes the equation of time up to about ±16 min) is inconsistent with that calibration and introduces a spurious seasonal density modulation of a few percent.

    Since:
    13.1.8

    • Enum Constant Detail

      • MEAN

        public static final NRLMSISE00.LocalSolarTimeMode MEAN
        Mean local solar time (UT + geographic longitude), matching the NRLMSISE-00 reference driver. The Sun position is not used.

      • APPARENT

        public static final NRLMSISE00.LocalSolarTimeMode APPARENT
        Apparent local solar time, computed as the satellite/true-Sun hour angle about Earth's rotation axis. Includes the equation of time.

    • Method Detail

      • values

        public static NRLMSISE00.LocalSolarTimeMode[] values()
        Returns an array containing the constants of this enum type, in the order they are declared. This method may be used to iterate over the constants as follows: 
        for (NRLMSISE00.LocalSolarTimeMode c : NRLMSISE00.LocalSolarTimeMode.values())
    System.out.println(c);
        Returns:
        an array containing the constants of this enum type, in the order they are declared

      • valueOf

        public static NRLMSISE00.LocalSolarTimeMode valueOf​(String name)
        Returns the enum constant of this type with the specified name. The string must match exactly an identifier used to declare an enum constant in this type. (Extraneous whitespace characters are not permitted.)
        Parameters:
        name - the name of the enum constant to be returned.
        Returns:
        the enum constant with the specified name
        Throws:
        IllegalArgumentException - if this enum type has no constant with the specified name
        NullPointerException - if the argument is null