vega.uplink.pointing.attitudes

Class Terminator

java.lang.Object

CompositeDataset

vega.uplink.pointing.PointingElement

vega.uplink.pointing.PointingAttitude

vega.uplink.pointing.attitudes.Terminator

public class Terminator
extends PointingAttitude

points the boresight to the point on the terminator that is in the comet-sun-SC plane and visible from the SC.

Field Summary

Fields inherited from class vega.uplink.pointing.PointingAttitude

ATTITUDE_TAG, POINTING_ATTITUDE_TYPE_CAPTURE, POINTING_ATTITUDE_TYPE_ILLUMINATEDPOINT, POINTING_ATTITUDE_TYPE_INERTIAL, POINTING_ATTITUDE_TYPE_LIMB, POINTING_ATTITUDE_TYPE_SPECULAR, POINTING_ATTITUDE_TYPE_TERMINATOR, POINTING_ATTITUDE_TYPE_TRACK, POINTING_ATTITUDE_TYPE_VELOCITY, POWEROPTIMIZED_TAG, REF_TAG

Constructor Summary

Constructors

Constructor and Description
Terminator()
Terminator(Boresight boresight, PhaseAngle phaseAngle, Surface surface) Generate an attitude that points the boresight to the point on the terminator that is in the comet-sun-SC plane and visible from the SC.
Terminator(Boresight boresight, PhaseAngle phaseAngle, Surface surface, OffsetAngles oAngles) Generate an attitude that points the boresight to the point on the terminator that is in the comet-sun-SC plane and visible from the SC.
Terminator(Boresight boresight, PhaseAngle phaseAngle, Surface surface, OffsetAngles oAngles, OffsetRefAxis oRefAxis) Generate an attitude that points the boresight to the point on the terminator that is in the comet-sun-SC plane and visible from the SC.
Terminator(PointingElement org)
Terminator(Surface surface) Generate an attitude that points the boresight to the point on the terminator that is in the comet-sun-SC plane and visible from the SC.

Method Summary

Methods

Modifier and Type	Method and Description
Terminator	copy()
Surface	getSurface()
void	setSurface(Surface surface)

Methods inherited from class vega.uplink.pointing.PointingAttitude

getAttitudeType, getBoresight, getOffsetAngles, getOffsetRefAxis, getPhaseAngle, setBoresight, SetOffset, setPhaseAngle

Methods inherited from class vega.uplink.pointing.PointingElement

addAttribute, addChild, asDataset, copyFrom, equals, getAttribute, getAttributes, getChild, getChildren, getDescription, getFirstLevelTextContent, getName, getValue, hasAttributtes, hasChildren, readFrom, regenerate, removeAttribute, removeAttribute, setDescription, setValue, toString, toStringParameter, toXml, validate

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Detail

Terminator

public Terminator(PointingElement org)

Terminator

public Terminator(Boresight boresight,
          PhaseAngle phaseAngle,
          Surface surface,
          OffsetAngles oAngles,
          OffsetRefAxis oRefAxis)

Generate an attitude that points the boresight to the point on the terminator that is in the comet-sun-SC plane and visible from the SC.

Parameters:

boresight - Vector defined in SC frame that shall be pointed to the target

phaseAngle - Rule that fixes the degree of freedom around the boresight.

surface - Elliptical surface

oAngles - OffsetAngles

oRefAxis - defines together with the boresight two axes in SC frame around which the rotations are performed. offsetRefAxis is of type direction vector. In the following these axes are called offset-x-axis and offset-y-axis. The offset-y-axis is the unit vector along the cross product of boresight and offsetRefAxis. The offset-x-axis is defined such that offset-x-axis, offset-y-axis and boresight form a right handed orthogonal frame. If for offsetRefAxis a direction vector is specified that is defined relative to inertial frame then it is converted to SC frame by using the basic pointing without offset rotations. The resulting SC attitude with offset rotations is given by the basic pointing rotated right handed first around the offset-x-axis by minus the y-angle and then a right handed rotation around the offset-y-axis by the x-angle. This convention is chosen because a positive x and y-angle rotate the boresight towards the offset-x-axis and y-axis, respectively

Terminator

public Terminator(Boresight boresight,
          PhaseAngle phaseAngle,
          Surface surface,
          OffsetAngles oAngles)

Generate an attitude that points the boresight to the point on the terminator that is in the comet-sun-SC plane and visible from the SC.

Parameters:

boresight - Vector defined in SC frame that shall be pointed to the target

phaseAngle - Rule that fixes the degree of freedom around the boresight.

surface - Elliptical surface

oAngles - OffsetAngles

Terminator

public Terminator(Boresight boresight,
          PhaseAngle phaseAngle,
          Surface surface)

Generate an attitude that points the boresight to the point on the terminator that is in the comet-sun-SC plane and visible from the SC.

Parameters:

boresight - Vector defined in SC frame that shall be pointed to the target

phaseAngle - Rule that fixes the degree of freedom around the boresight.

surface - Elliptical surface

Terminator

public Terminator(Surface surface)

Generate an attitude that points the boresight to the point on the terminator that is in the comet-sun-SC plane and visible from the SC.

Parameters:

surface - Elliptical surface

Terminator

public Terminator()

Method Detail

copy

public Terminator copy()

Overrides:

copy in class PointingAttitude

setSurface

public void setSurface(Surface surface)

getSurface

public Surface getSurface()