Package org.orekit.attitudes

This package provides classes to represent simple attitudes.

Some force models such as the atmospheric drag or the maneuvers need to know the spacecraft orientation in inertial frame. OREKIT uses a simple container for Attitude which includes both the geometric part (i.e. rotation) and the kinematic part (i.e. the instant spin axis). The components hold by this container allow to convert vectors from inertial frame to spacecraft frame along with their derivatives. This container is similar in spirit to the various extensions of the abstract Orbit class: it represents a state at a specific instant.

Several classical attitude laws are already provided in this package. One special implementation is the AttitudesSequence class which handle a set of laws, only one of which being active at any time. The active law changes as switch events are triggered.

Author:

Fabien Maussion, Luc Maisonobe, Véronique Pommier-Maurussane

Interface Summary

Interface	Description
AttitudeBuilder	This interface represents a builder for attitude.
AttitudeProvider	This interface represents an attitude provider model set.
AttitudeProviderModifier	This interface represents an attitude provider that modifies/wraps another underlying provider.
AttitudesSequence.SwitchHandler	Interface for attitude switch notifications.
BoundedAttitudeProvider	This interface is intended for attitude ephemerides valid only during a time range.
TargetProvider	Provider for target vector.

Class Summary

Class	Description
AggregateBoundedAttitudeProvider	A BoundedAttitudeProvider that covers a larger time span from several constituent attitude providers that cover shorter time spans.
AlignedAndConstrained	Attitude provider with one satellite vector aligned and another one constrained to two targets.
Attitude	This class handles attitude definition at a given date.
AttitudeInterpolator	Class for attitude interpolation.
AttitudesSequence	This classes manages a sequence of different attitude providers that are activated in turn according to switching events.
BodyCenterPointing	This class handles body center pointing attitude provider.
CelestialBodyPointed	This class handles a celestial body pointed attitude provider.
FieldAttitude<T extends CalculusFieldElement<T>>	This class handles attitude definition at a given date.
FieldAttitudeInterpolator<KK extends CalculusFieldElement<KK>>	Class for attitude interpolation.
FieldInertia<T extends CalculusFieldElement<T>>	Container for inertia of a 3D object.
FieldInertiaAxis<T extends CalculusFieldElement<T>>	Container for inertial axis.
FixedFrameBuilder	Builder that assumes angular coordinates are given in a fixed frame.
FixedRate	This class handles a simple attitude provider at constant rate around a fixed axis.
FrameAlignedProvider	This class handles an attitude provider aligned with a frame or a fixed offset to it.
GroundPointing	Base class for ground pointing attitude providers.
GroundPointingAttitudeModifier	Abstract class for attitude provider modifiers using an underlying ground pointing law.
GroundPointTarget	Ground point target for AlignedAndConstrained.
Inertia	Container for inertia of a 3D object.
InertiaAxis	Container for inertial axis.
LofOffset	Attitude law defined by fixed Roll, Pitch and Yaw angles (in any order) with respect to a local orbital frame.
LofOffsetPointing	This class provides a default attitude provider.
NadirPointing	This class handles nadir pointing attitude provider.
SpinStabilized	This class handles a spin stabilized attitude provider.
TabulatedLofOffset	This class handles an attitude provider interpolating from a predefined table containing offsets from a Local Orbital Frame.
TabulatedProvider	This class handles an attitude provider interpolating from a predefined table.
TargetPointing	This class handles target pointing attitude provider.
TorqueFree	This class handles torque-free motion of a general (non-symmetrical) body.
YawCompensation	This class handles yaw compensation attitude provider.
YawSteering	This class handles yaw steering law.

Enum Summary

Enum	Description
PredefinedTarget	Predefined targets for AlignedAndConstrained.