vega.uplink.pointing

Class PointingBlockGSEP

java.lang.Object

CompositeDataset

vega.uplink.pointing.PointingElement

vega.uplink.pointing.PointingBlock

vega.uplink.pointing.PointingBlockGSEP

All Implemented Interfaces:

PointingBlockInterface

public class PointingBlockGSEP
extends PointingBlock

The on-board implemented autonomous guidance attitude can be modelled in the PTR by using a GSEP block.

Field Summary

Fields inherited from class vega.uplink.pointing.PointingBlock

BLOCK_TAG, ENDTIME_TAG, STARTTIME_TAG, TYPE_GSEP, TYPE_MNAV, TYPE_MOCM, TYPE_MSLW, TYPE_MWAC, TYPE_MWNV, TYPE_MWOL, TYPE_OBS, TYPE_SLEW

Constructor Summary

Constructors

Constructor and Description
PointingBlockGSEP(java.util.Date startTime, java.util.Date endTime, PointedAxis coordinates, boolean sunPointing, boolean ecliptic, boolean north) Creates a pointing block with an autonomous guidance attitude

Method Summary

Methods

Modifier and Type	Method and Description
boolean	isEcliptic()
boolean	isNorth()
boolean	isSunPointing()
void	setBooleanField(java.lang.String field, boolean value)

Methods inherited from class vega.uplink.pointing.PointingBlock

addMetadata, asDataset, copy, dateToZulu, getAttitude, getDuration, getEndTime, getInstrument, getMetadata, getMetadata, getMetadataElement, getStartTime, getType, getVstpNumberMeta, isMaintenance, isSlew, readFrom, setAttitude, setEndTime, setMetadata, setStartTime, toPointingBlock, validate, zuluToDate

Methods inherited from class vega.uplink.pointing.PointingElement

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

Methods inherited from class java.lang.Object

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

Constructor Detail

PointingBlockGSEP

public PointingBlockGSEP(java.util.Date startTime,
                 java.util.Date endTime,
                 PointedAxis coordinates,
                 boolean sunPointing,
                 boolean ecliptic,
                 boolean north)

Creates a pointing block with an autonomous guidance attitude

Parameters:

startTime - Start time for the time interval covered by this block

endTime - End time for the time interval covered by this block

coordinates - SC axis that is either pointed to the Earth or the Sun

sunPointing - Flag stating whether the pointedAxis is pointed to the Sun (=true) or to Earth (=false).

ecliptic - Flag stating whether the SC-y-axis must be (nearly) perpendicular to the ecliptic plane (=true) or along the cross product of Sun and Earth direction (=false)

north - Defines the direction of the SC-y-axis. If ecliptic=true, the y-axis points towards ecliptic north and south for north=true and false respectively. If ecliptic=false, the y-axis points towards plus and minus the cross product of Earth and Sun direction for north=true and false, respectively.

Method Detail

setBooleanField

public void setBooleanField(java.lang.String field,
                   boolean value)

isSunPointing

public boolean isSunPointing()

Returns:

True if pointedAxis is pointed to sun or False if it is pointed to Earth.

isEcliptic

public boolean isEcliptic()

Returns:

True if SC-y-axis must be (nearly) perpendicular to the ecliptic plane or False if SC-y-axis must be along the cross product of Sun and Earth direction

isNorth

public boolean isNorth()

Returns:

True if ecliptic=true and the y-axis points towards ecliptic north. False if ecliptic=true and the y-axis points towards ecliptic south. True if ecliptic=false, the y-axis points towards plus and minus the cross product of Earth direction. False if ecliptic=false, the y-axis points towards plus and minus the cross product of Sun direction.