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 CelestialBodyFactory
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.
Interface | Description |
---|---|
EOPBasedTransformProvider |
Interface for Transform providers that use
Earth Orientation Parameters . |
EOPHistoryLoader |
Interface for loading Earth Orientation Parameters history.
|
TransformProvider |
Interface for Transform providers.
|
Class | Description |
---|---|
EclipticProvider |
An inertial frame aligned with the ecliptic.
|
EOPEntry |
This class holds an Earth Orientation Parameters entry.
|
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 by
FramesFactory . |
FieldPoleCorrection<T extends org.hipparchus.RealFieldElement<T>> |
Simple container class for pole correction parameters.
|
FieldTransform<T extends org.hipparchus.RealFieldElement<T>> |
Transformation class in three dimensional space.
|
FieldTransformGenerator<T extends org.hipparchus.RealFieldElement<T>> |
Generator to use field transforms in
GenericTimeStampedCache . |
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.
|
L1Frame |
Class to create a L1 centered frame with
L1TransformProvider . |
L1TransformProvider |
L1 Transform provider for a frame on the L1 Lagrange point of two celestial bodies.
|
L2Frame |
Class to create a L2 centered frame with
L2TransformProvider . |
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.
|
ShiftingTransformProvider |
Transform provider using thread-safe shifts on transforms sample.
|
TopocentricFrame |
Topocentric frame.
|
Transform |
Transformation class in three dimensional space.
|
TransformGenerator |
Generator to use transforms in
GenericTimeStampedCache . |
TransformProviderUtils |
Utility for Transform providers.
|
UpdatableFrame |
Frame whose transform from its parent can be updated.
|
VersionedITRF |
Specific version of International Terrestrial Reference Frame.
|
Enum | Description |
---|---|
HelmertTransformation.Predefined |
Enumerate for predefined Helmert transformations.
|
ITRFVersion |
Enumerate for ITRF versions.
|
LOFType |
Enumerate for different types of Local Orbital Frames.
|
Predefined |
Predefined frames provided by
FramesFactory . |
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