iau_orientation_module Module

IAU orientation models for the Earth and planets.

See also

  1. NAIF SPICE pck.html documentation
  2. "Report of the IAU Working Group on Cartographic Coordinates and Rotational Elements: 2009", Celestial Mechanics and Dynamical Astronomy, February 2011, Vol 109, Issue 2, p 101-135.

Uses

  • module~~iau_orientation_module~~UsesGraph module~iau_orientation_module iau_orientation_module module~conversion_module conversion_module module~iau_orientation_module->module~conversion_module module~kind_module kind_module module~iau_orientation_module->module~kind_module module~numbers_module numbers_module module~iau_orientation_module->module~numbers_module module~conversion_module->module~kind_module module~conversion_module->module~numbers_module iso_fortran_env iso_fortran_env module~kind_module->iso_fortran_env module~numbers_module->module~kind_module

Used by

  • module~~iau_orientation_module~~UsedByGraph module~iau_orientation_module iau_orientation_module module~fortran_astrodynamics_toolkit fortran_astrodynamics_toolkit module~fortran_astrodynamics_toolkit->module~iau_orientation_module module~transformation_module transformation_module module~fortran_astrodynamics_toolkit->module~transformation_module module~lighting_module lighting_module module~fortran_astrodynamics_toolkit->module~lighting_module module~transformation_module->module~iau_orientation_module module~lighting_module->module~transformation_module

Functions

public pure function iau_rotation_matrix(w, dec, ra) result(rotmat)

Author
Jacob Williams
Date
2/3/2015

Returns the rotation matrix for a coordinate transformation from the International Celestial Reference Frame (ICRF) frame to the IAU rotating frame associated with a body. The IAU orientation models use three Euler angles to describe the pole and prime meridian location (ra, dec, and w).

Arguments

Type IntentOptional Attributes Name
real(kind=wp), intent(in) :: w

right ascension of the pole [rad]
real(kind=wp), intent(in) :: dec

declination of the pole [rad]
real(kind=wp), intent(in) :: ra

prime meridian location [rad]

Return Value real(kind=wp), dimension(3,3)

the rotation matrix

public pure function icrf_to_iau_earth(et) result(rotmat)

Author
Jacob Williams
Date
2/3/2015

Rotation matrix from ICRF to IAU_EARTH.

Arguments

Type IntentOptional Attributes Name
real(kind=wp), intent(in) :: et

ephemeris time [sec]

Return Value real(kind=wp), dimension(3,3)

the rotation matrix

public pure function icrf_to_iau_moon(et) result(rotmat)

Author
Jacob Williams
Date
3/5/2016

Rotation matrix from ICRF to IAU_MOON.

Arguments

Type IntentOptional Attributes Name
real(kind=wp), intent(in) :: et

ephemeris time [sec]

Return Value real(kind=wp), dimension(3,3)

the rotation matrix


Subroutines

public subroutine iau_test()

Author
Jacob Williams
Date
2/3/2015

Unit test routine for iau_module.

Arguments

None