Package org.orekit.frames
The Transform
class represents a full transform:
combined rotation and translation, and their first time derivatives to handle kinematics.
Each Frame
is defined by a transform linking it to
another one, called its parent frame. The only exception is the root frame which has
no parent. This implies that all frames are naturally organized as a tree with a single
root. The predefined GCRF inertial frame was arbitrary chosen as the root for every tree.
The FramesFactory
class implements several predefined reference
frames. One set correspond to the frames from the various IERS conventions (ITRF and others).
Other frames not belonging to the previous set are the EME2000 frame that was used prior
to GCRF and which is linked to GCRF by a simple bias rotation, the MOD (Mean Of Date) frame
which involves the IAU 1976 precession model, the TOD (True Of Date) frame which involves
the IAU 1980 nutation model, the GTOD (Greenwich True Of Date) which involves the IAU 1982
Greenwich sidereal time model and the Veis 1950 frame which involves a Veis modified sidereal
time model.
Some other frames are predefined outside of this package, in the CelestialBodies
class. They correspond to the Sun, Moon, planets, solar
system barycenter and Earth-Moon barycenter. For convenience, the very important solar system
barycenter frame, which is the ICRF, can also be retrieved from the factory in this package
even if it is really implemented in the bodies package.
The frames can be time dependent (for example the ITRF frame depends on time due to
precession/nutation, Earth rotation and pole motion). In order to get a transform from one
frame to another one, the date must be specified, and TransformProvider.getTransform(AbsoluteDate)
is called under the hood.
If a user wants to implement his own date synchronized frame, he has to implement his
own TransformProvider
class and provide it to the frame constructor.
- Author:
- Luc Maisonobe, Fabien Maussion, VĂ©ronique Pommier-Maurussane, Pascal Parraud
-
Interface Summary Interface Description EOPBasedTransformProvider Interface for Transform providers that useEarth Orientation Parameters
.EopHistoryLoader Interface for loading Earth Orientation Parameters history.EopHistoryLoader.Parser Interface for parsing EOP data files.FieldKinematicTransform<T extends CalculusFieldElement<T>> A transform that only includes translation and rotation as well as their respective rates.FieldStaticTransform<T extends CalculusFieldElement<T>> A transform that only includes translation and rotation.Frames A collection of commonly usedFrame
s.ItrfVersionProvider Interface for retrieving the ITRF version for a given set of EOP data.KinematicTransform A transform that only includes translation and rotation as well as their respective rates.LOF Interface for local orbital frame.StaticTransform A transform that only includes translation and rotation.TransformProvider Interface for Transform providers. -
Class Summary Class Description AbstractEopLoader Base class for EOP loaders.AbstractFrames This class is an implementation ofFrames
that creates frames when they are first used and uses synchronization to ensure that each frame is only created once.CR3BPRotatingFrame Class creating the rotating frame centered on the barycenter of the CR3BP System.EclipticProvider An inertial frame aligned with the ecliptic.EOPEntry This class holds an Earth Orientation Parameters entry.EOPFittedModel Container for fitted model for Earth Orientation Parameters.EOPFitter Earth Orientation Parameters fitter forEOP prediction
.EOPHistory This class loads any kind of Earth Orientation Parameter data throughout a large time range.FactoryManagedFrame Base class for the predefined frames that are managed byFrames
.FieldPoleCorrection<T extends CalculusFieldElement<T>> Simple container class for pole correction parameters.FieldTransform<T extends CalculusFieldElement<T>> Transformation class in three-dimensional space.FieldTransformGenerator<T extends CalculusFieldElement<T>> Generator to use field transforms inGenericTimeStampedCache
.FixedTransformProvider Transform provider using fixed transform.Frame Tridimensional references frames class.FramesFactory Factory for predefined reference frames.GTODProvider Greenwich True Of Date Frame, also known as True of Date Rotating frame (TDR) or Greenwich Rotating Coordinate frame (GCR).HelmertTransformation Transformation class for geodetic systems.InterpolatingTransformProvider Transform provider using thread-safe interpolation on transforms sample.ITRFVersion.Converter Specialized transform provider between ITRF frames.ITRFVersionLoader Loader for ITRF version configuration file.ITRFVersionLoader.ITRFVersionConfiguration ITRF version configuration entry.L1Frame Class to create a L1 centered frame withL1TransformProvider
.L1TransformProvider L1 Transform provider for a frame on the L1 Lagrange point of two celestial bodies.L2Frame Class to create a L2 centered frame withL2TransformProvider
.LazyLoadedEop Loads Earth Orientation Parameters (EOP) from a configured set ofEopHistoryLoader
s on demand.LazyLoadedFrames This class lazily loads auxiliary data when it is needed by a requested frame.LocalMagneticFieldFrame This class handles a magnetic field variation attitude provider.LocalOrbitalFrame Class for frames moving with an orbiting satellite.OrphanFrame Prototype frame that can be built from leaf to roots and later attached to a tree.PoleCorrection Simple container class for pole correction parameters.PredictedEOPHistory This class extends anEOPHistory
for some weeks using fitting.ShiftingTransformProvider Transform provider using thread-safe shifts on transforms sample.SingleParameterFitter Fitter for one Earth Orientation Parameter.TopocentricFrame Topocentric frame.Transform Transformation class in three dimensional space.TransformGenerator Generator to use transforms inGenericTimeStampedCache
.TransformProviderUtils Utility for Transform providers.TwoBodiesBaryFrame Class creating the inertial barycenter frame from two bodies.UpdatableFrame Frame whose transform from its parent can be updated.VersionedITRF Specific version of International Terrestrial Reference Frame. -
Enum Summary Enum Description HelmertTransformation.Predefined Enumerate for predefined Helmert transformations.ITRFVersion Enumerate for ITRF versions.LocalMagneticFieldFrame.LOFBuilderVector Enum defining how the +j axis of the local orbital frame will be defined.LOFType Enumerate for different types of Local Orbital Frames.Predefined Predefined frames provided byFrames
.