agi.foundation.geometry.shapes

(agi.foundation.core-2024r3.jar)

Class SyntheticApertureRadarVolume

java.lang.Object

agi.foundation.geometry.shapes.Figure

agi.foundation.geometry.shapes.Solid

agi.foundation.geometry.shapes.SensorFieldOfView

agi.foundation.geometry.shapes.SyntheticApertureRadarVolume

All Implemented Interfaces:

IServiceProvider

public class SyntheticApertureRadarVolume
extends SensorFieldOfView

A sensor volume defined by inner and outer half angles, fore and aft exclusion angles, and a radial range limit. The outer half angle defines the outer boundary of the volume, and the other half angles define exclusion boundaries for the sensor volume.

As depicted in the figure below, the vertex of the volume is located at the origin and the sensor principal direction is along the positive z-axis. Half angles measured from the principal direction are used to define the outer boundary of the volume as well as an interior conical volume of exclusion. Fore and aft half angles are used to define a conical volumes of exclusion about the positive and negative x-axis, respectively. The range limit measured radially from the origin closes the volume.

Constructor Summary

Constructors

Constructor and Description
SyntheticApertureRadarVolume() Constructs a sensor volume with a default definition, in which the InnerHalfAngle (get) has a value of one-fourth pi radians, the OuterHalfAngle (get) has a value of Constants.HalfPi radians, the ForeHalfAngle (get / set) and AftHalfAngle (get / set) are both equal to zero, and the radius is equal to positive infinity.
SyntheticApertureRadarVolume(double innerHalfAngle, double outerHalfAngle, double aftHalfAngle, double foreHalfAngle) Constructs a volume of infinite radius with the provided parameters.
SyntheticApertureRadarVolume(double innerHalfAngle, double outerHalfAngle, double aftHalfAngle, double foreHalfAngle, double radius) Constructs a volume of limited radius with the provided parameters.

Method Summary

Modifier and Type	Method and Description
boolean	encloses(Cartesian point) Indicates if the provided point is inside the volume.
double	getAftHalfAngle() Gets the aft half angle defining the conical volume of exclusion about the negative x-axis.
EnclosureDescriptionCollection	getEnclosureDescriptions() Gets the list of descriptions for the enclosure functions for this solid.
double	getForeHalfAngle() Gets the fore half angle defining the conical volume of exclusion about the positive x-axis.
double	getInnerHalfAngle() Gets the inner half angle used to define the interior conical volume of exclusion.
boolean	getIsConnected() Gets a value indicating whether the figure is connected.
double	getOuterHalfAngle() Gets the outer half angle used to define the exterior conical boundary of the volume.
SensorProjection	getProjection(Ellipsoid ellipsoid, KinematicTransformation ellipsoidToSensorTransformation, SensorProjectionOptions projectionOptions) Gets the projection of the sensor onto the front surface of a specified ellipsoid and onto a plane at a specified distance in space.
protected void	onRadiusChanged() Called after the Radius (get / set) property changes.
void	setAftHalfAngle(double value) Sets the aft half angle defining the conical volume of exclusion about the negative x-axis.
void	setForeHalfAngle(double value) Sets the fore half angle defining the conical volume of exclusion about the positive x-axis.
void	setInnerOuterHalfAngles(double inner, double outer) Sets the inner and outer half angles of a sensor, which define part of the sensor volume.

Methods inherited from class agi.foundation.geometry.shapes.SensorFieldOfView

getProjection, getRadius, getService, setRadius

Methods inherited from class java.lang.Object

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

Constructor Detail

SyntheticApertureRadarVolume

public SyntheticApertureRadarVolume()

Constructs a sensor volume with a default definition, in which the InnerHalfAngle (get) has a value of one-fourth pi radians, the OuterHalfAngle (get) has a value of Constants.HalfPi radians, the ForeHalfAngle (get / set) and AftHalfAngle (get / set) are both equal to zero, and the radius is equal to positive infinity.

SyntheticApertureRadarVolume

public SyntheticApertureRadarVolume(double innerHalfAngle,
                                    double outerHalfAngle,
                                    double aftHalfAngle,
                                    double foreHalfAngle)

Constructs a volume of infinite radius with the provided parameters.

Parameters:

innerHalfAngle - The angle between the principal direction and the outermost boundary of the interior conical volume of exclusion. Defines the interior conical volume of exclusion.

outerHalfAngle - The angle between the principal direction and the outermost boundary of the sensor volume. Defines the exterior conical boundary of volume.

aftHalfAngle - Defines the conical volume of exclusion about the negative x-axis.

foreHalfAngle - Defines the conical volume of exclusion about the positive x-axis.

SyntheticApertureRadarVolume

public SyntheticApertureRadarVolume(double innerHalfAngle,
                                    double outerHalfAngle,
                                    double aftHalfAngle,
                                    double foreHalfAngle,
                                    double radius)

Constructs a volume of limited radius with the provided parameters.

Parameters:

innerHalfAngle - The angle between the principal direction and the outermost boundary of the interior conical volume of exclusion. Defines the interior conical volume of exclusion.

outerHalfAngle - The angle between the principal direction and the outermost boundary of the sensor volume. Defines the exterior conical boundary of volume.

aftHalfAngle - Defines the conical volume of exclusion about the negative x-axis.

foreHalfAngle - Defines the conical volume of exclusion about the positive x-axis.

radius - The radial limit of the volume. This is the maximum range at which the sensor can detect a target.

Method Detail

getIsConnected

public boolean getIsConnected()

Gets a value indicating whether the figure is connected.

Specified by:

getIsConnected in class Figure

onRadiusChanged

protected void onRadiusChanged()

Called after the Radius (get / set) property changes.

Overrides:

onRadiusChanged in class SensorFieldOfView

getInnerHalfAngle

public final double getInnerHalfAngle()

Gets the inner half angle used to define the interior conical volume of exclusion.

getOuterHalfAngle

public final double getOuterHalfAngle()

Gets the outer half angle used to define the exterior conical boundary of the volume.

getForeHalfAngle

public final double getForeHalfAngle()

Gets the fore half angle defining the conical volume of exclusion about the positive x-axis.

Throws:

ArgumentOutOfRangeException - Thrown when the provided fore half angle is less than zero or greater than or equal to Constants.HalfPi radians.

setForeHalfAngle

public final void setForeHalfAngle(double value)

Sets the fore half angle defining the conical volume of exclusion about the positive x-axis.

Throws:

ArgumentOutOfRangeException - Thrown when the provided fore half angle is less than zero or greater than or equal to Constants.HalfPi radians.

getAftHalfAngle

public final double getAftHalfAngle()

Gets the aft half angle defining the conical volume of exclusion about the negative x-axis.

Throws:

ArgumentOutOfRangeException - Thrown when the provided aft half angle is less than zero or greater than or equal to Constants.HalfPi radians.

setAftHalfAngle

public final void setAftHalfAngle(double value)

Sets the aft half angle defining the conical volume of exclusion about the negative x-axis.

Throws:

ArgumentOutOfRangeException - Thrown when the provided aft half angle is less than zero or greater than or equal to Constants.HalfPi radians.

setInnerOuterHalfAngles

public final void setInnerOuterHalfAngles(double inner,
                                          double outer)

Sets the inner and outer half angles of a sensor, which define part of the sensor volume.

STK Desktop, unlike DME Component Libraries, determines the inner and outer half angles by specifying the maximum and minimum ground elevation angles, respectively. Additionally, a reference radius for the surface of the central body and the altitude of the SAR sensor above the surface must be specified as indicated in the following diagram.

Parameters:

inner - The angle between the principal direction and the outermost boundary of the interior conical volume of exclusion. Defines the interior conical volume of exclusion.

outer - The angle between the principal direction and the outermost boundary of the sensor volume. Defines the exterior conical boundary of volume.

Throws:

ArgumentOutOfRangeException - Thrown when either the inner or outer half angle is outside the range 0 to π radians.

ArgumentException - Thrown when the inner half angle is greater than or equal to the outer half angle.

encloses

public boolean encloses(@Nonnull
                        Cartesian point)

Indicates if the provided point is inside the volume.

The point parameter must be expressed in the same coordinate frame that the volume is defined in.

Specified by:

encloses in class Solid

Parameters:

point - The point to evaluate.

Returns:

true if the point is inside the volume and false if the point lies on the boundary or outside of the volume.

getEnclosureDescriptions

public EnclosureDescriptionCollection getEnclosureDescriptions()

Gets the list of descriptions for the enclosure functions for this solid.

Specified by:

getEnclosureDescriptions in class Solid

Returns:

The list of enclosure descriptions.

getProjection

public SensorProjection getProjection(Ellipsoid ellipsoid,
                                      @Nonnull
                                      KinematicTransformation ellipsoidToSensorTransformation,
                                      SensorProjectionOptions projectionOptions)

Gets the projection of the sensor onto the front surface of a specified ellipsoid and onto a plane at a specified distance in space.

Specified by:

getProjection in class SensorFieldOfView

Parameters:

ellipsoid - The ellipsoid on which the sensor is to be projected.

ellipsoidToSensorTransformation - The transformation from the reference frame of the ellipsoid to the reference frame of the sensor.

projectionOptions - The options controlling how the sensor is projected, or null to use defaults.

Returns:

The sensor projection.