EarthRotation

This class realize the transformation between a terestrial reference frame (TRF) and a celestial reference frame (CRF).

File

This class realize the transformation by interpolation from file. This file can be created with EarthOrientationParameterTimeSeries.

Name	Type	Annotation
inputfileEOP	filename
interpolationDegree	uint	for polynomial interpolation

Iers2010

This class realize the transformation according to the IERS2010 conventions given by the International Earth Rotation and Reference Systems Service (IERS). A file with the earth orientation parameter is needed (inputfileEOP).

Name	Type	Annotation
inputfileEOP	filename
truncatedNutation	boolean	use truncated nutation model (IAU2006B)

Iers2010b

This class realize the transformation according to the IERS2010 conventions given by the International Earth Rotation and Reference Systems Service (IERS). A file with the earth orientation parameter is needed (inputfileEOP). Includes additional high-frequency EOP models (inputfileDoodsonEOP).

Name	Type	Annotation
inputfileEOP	filename
inputfileDoodsonEOP	filename

Iers2003

This class realize the transformation according to IERS2003 conventions given by the International Earth Rotation and Reference Systems Service (IERS). A file with the earth orientation parameter is needed (inputfileEOP).

The following subroutines are used:

• BPN2000.f,
• ERA2000.f,
• pmsdnut.f,
• POM2000.f,
• SP2000.f,
• T2C2000.f,
• XYS2000A.f

from ftp://maia.usno.navy.mil/conv2000/chapter5/ and

• orthoeop.f

from ftp://maia.usno.navy.mil/conv2000/chapter8/

Name	Type	Annotation
inputfileEOP	filename

Iers1996

Very old.

Name	Type	Annotation
inputfileEOP	filename
inputfileNutation	filename

Gmst

The transformation is realized as rotation about the z-axis. The angle ist given by the Greenwich Mean Siderial Time (GMST).

  Double Tu0 = (timeUTC.mjdInt()-51544.5)/36525.0;
  Double GMST0 = (6.0/24 + 41.0/(24*60) + 50.54841/(24*60*60))
               + (8640184.812866/(24*60*60))*Tu0
               + (0.093104/(24*60*60))*Tu0*Tu0
               + (-6.2e-6/(24*60*60))*Tu0*Tu0*Tu0;
  Double r = 1.002737909350795 + 5.9006e-11*Tu0 - 5.9e-15*Tu0*Tu0;
  GMST = fmod(2*PI*(GMST0 + r * timeUTC.mjdMod()), 2*PI);

Earth Rotation Angle (ERA)

The transformation is realized as rotation about the z-axis. The angle ist given by the Earth Rotation Angle (ERA).

Z-Axis

The transformation is realized as rotation about the z-axis. You must specify the angle (initialAngle) at time0 and the angular velocity (angularVelocity).

Name	Type	Annotation
initialAngle	double	Angle at time0 [rad]
angularVelocity	double	[rad/s]
time0	time

StarCamera

This class reads quaternions from an instrument file and interpolates to the given time stamp.

Name	Type	Annotation
inputfileStarCamera	filename
interpolationDegree	uint	degree of interpolation polynomial

MoonRotation

This class realizes the transformation between the moon-fixed system (Principal Axis System (PA) or Mean Earth System (ME)) and the ICRS according to the JPL ephemeris file.

Name	Type	Annotation
inputfileEphemerides	filename	librations
moonfixedSystem	choice
PA		Principal Axis System
ME		Mean Earth System