agi.foundation.radar

(agi.foundation.radar-2024r2.jar)

Class DualPolarizedRadarReceivingAntennaExtension

java.lang.Object

agi.foundation.infrastructure.DefinitionalObject

agi.foundation.infrastructure.ObjectExtension

agi.foundation.communications.antennas.BaseReceivingAntennaExtension<TGainPattern,TAntennaSignalProcessor>

agi.foundation.communications.antennas.BaseDualPolarizedReceivingAntennaExtension<RadioFrequencyGainPattern,RadarAntennaSignalProcessor>

agi.foundation.radar.DualPolarizedRadarReceivingAntennaExtension

All Implemented Interfaces:

IReceivingAntennaExtension<RadioFrequencyGainPattern>, ISignalReceivedByAntennaPrepolarizerService, ISignalReceivedByAntennaService, ICloneWithContext, IEnumerateDependencies, IEquatableDefinition, IFreezable, IServiceProvider

public class DualPolarizedRadarReceivingAntennaExtension
extends BaseDualPolarizedReceivingAntennaExtension<RadioFrequencyGainPattern,RadarAntennaSignalProcessor>

An extension which represents a dual polarized radio frequency (RF) radar receiving antenna.

Constructor Summary

Constructors

Constructor and Description
DualPolarizedRadarReceivingAntennaExtension() Initializes a new instance.
DualPolarizedRadarReceivingAntennaExtension(DualPolarizedRadarReceivingAntennaExtension existingInstance, CopyContext context) Initializes a new instance as a copy of an existing instance.
DualPolarizedRadarReceivingAntennaExtension(RadioFrequencyGainPattern antennaGainPattern, double antennaNoise) Initialize a new instance based on the given gain pattern and antenna noise temperature.

Method Summary

Modifier and Type	Method and Description
protected boolean	checkForSameDefinition(BaseDualPolarizedReceivingAntennaExtension<RadioFrequencyGainPattern,RadarAntennaSignalProcessor> other) Checks to determine if another instance has the same definition as this instance and returns true if it does.
protected boolean	checkForSameDefinition(DualPolarizedRadarReceivingAntennaExtension other) Checks to determine if another instance has the same definition as this instance and returns true if it does.
Object	clone(CopyContext context) Clones this object using the specified context.
protected int	computeCurrentDefinitionHashCode() Computes a hash code based on the current properties of this object.
double	getAntennaNoiseTemperature() Gets the equivalent noise temperature for the antenna, in kelvin.
void	setAntennaNoiseTemperature(double value) Sets the equivalent noise temperature for the antenna, in kelvin.

Methods inherited from class agi.foundation.communications.antennas.BaseDualPolarizedReceivingAntennaExtension

checkForSameDefinition, enumerateDependencies, getOrthogonalPolarizationAntennaSignalProcessor, getOrthogonalPolarizationOutputSignalProcessor, getPolarizationSource, getPrimaryPolarizationAntennaSignalProcessor, getPrimaryPolarizationOutputSignalProcessor, setOrthogonalPolarizationAntennaSignalProcessor, setPolarizationSource, setPrimaryPolarizationAntennaSignalProcessor

Methods inherited from class agi.foundation.communications.antennas.BaseReceivingAntennaExtension

checkForSameDefinition, freezeAggregatedObjects, getAntennaGainPattern, getAntennaSignalProcessor, getCrossPolarizationLeakage, getOutputSignalProcessor, getOutputSignalProcessorPrepolarizer, getService, setAntennaGainPattern, setAntennaSignalProcessor, setCrossPolarizationLeakage

Methods inherited from class agi.foundation.infrastructure.ObjectExtension

checkForSameDefinition, getOwner

Methods inherited from class agi.foundation.infrastructure.DefinitionalObject

areSameDefinition, areSameDefinition, areSameDefinition, areSameDefinition, areSameDefinition, collectionItemsAreSameDefinition, collectionItemsAreSameDefinition, collectionItemsAreSameDefinition, dictionaryItemsAreSameDefinition, freeze, getCollectionHashCode, getCollectionHashCode, getCollectionHashCode, getDefinitionHashCode, getDefinitionHashCode, getDefinitionHashCode, getDefinitionHashCode, getDefinitionHashCode, getDefinitionHashCode, getDictionaryHashCode, getIsFrozen, isSameDefinition, throwIfFrozen

Methods inherited from class java.lang.Object

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

Methods inherited from interface agi.foundation.communications.antennas.IReceivingAntennaExtension

getOwner

Constructor Detail

DualPolarizedRadarReceivingAntennaExtension

public DualPolarizedRadarReceivingAntennaExtension()

Initializes a new instance.

By default, a ParabolicGainPattern is used for computing the antenna gain with an antenna noise temperature of 0.0 K.

DualPolarizedRadarReceivingAntennaExtension

public DualPolarizedRadarReceivingAntennaExtension(RadioFrequencyGainPattern antennaGainPattern,
                                                   double antennaNoise)

Initialize a new instance based on the given gain pattern and antenna noise temperature.

Parameters:

antennaGainPattern - The gain pattern to apply to incoming signals based on the angle off of the boresight (z-axis) of the parent object's Axes.

antennaNoise - The equivalent noise temperature, in kelvin, to add to the signal after applying the antenna gain.

DualPolarizedRadarReceivingAntennaExtension

public DualPolarizedRadarReceivingAntennaExtension(@Nonnull
                                                   DualPolarizedRadarReceivingAntennaExtension existingInstance,
                                                   @Nonnull
                                                   CopyContext context)

Initializes a new instance as a copy of an existing instance.

See ICloneWithContext.clone(CopyContext) for more information about how to implement this constructor in a derived class.

Parameters:

existingInstance - The existing instance to copy.

context - A CopyContext that controls the depth of the copy.

Throws:

ArgumentNullException - Thrown when existingInstance or context is null.

Method Detail

checkForSameDefinition

protected final boolean checkForSameDefinition(BaseDualPolarizedReceivingAntennaExtension<RadioFrequencyGainPattern,RadarAntennaSignalProcessor> other)

Description copied from class: BaseDualPolarizedReceivingAntennaExtension

Checks to determine if another instance has the same definition as this instance and returns true if it does. Derived classes MUST override this method and check all new fields introduced by the derived class for definitional equivalence. It is NOT necessary to check base class fields because the base class will already have done that. When overriding this method, you should NOT call the base implementation because it will return false for all derived-class instances. Derived classes should check the type of other to preserve the symmetric nature of IEquatableDefinition.isSameDefinition(java.lang.Object).

Overrides:

checkForSameDefinition in class BaseDualPolarizedReceivingAntennaExtension<RadioFrequencyGainPattern,RadarAntennaSignalProcessor>

Parameters:

other - The other instance to compare to this one.

Returns:

true if the two objects are defined equivalently; otherwise false.

checkForSameDefinition

protected boolean checkForSameDefinition(DualPolarizedRadarReceivingAntennaExtension other)

Checks to determine if another instance has the same definition as this instance and returns true if it does. Derived classes MUST override this method and check all new fields introduced by the derived class for definitional equivalence. It is NOT necessary to check base class fields because the base class will already have done that. When overriding this method, you should NOT call the base implementation because it will return false for all derived-class instances. Derived classes should check the type of other to preserve the symmetric nature of IEquatableDefinition.isSameDefinition(java.lang.Object).

Parameters:

other - The other instance to compare to this one.

Returns:

true if the two objects are defined equivalently; otherwise false.

clone

public Object clone(CopyContext context)

Clones this object using the specified context.

This method should be implemented to call a copy constructor on the class of the object being cloned. The copy constructor should take the CopyContext as a parameter in addition to the existing instance to copy. The copy constructor should first call CopyContext.addObjectMapping(T, T) to identify the newly constructed instance as a copy of the existing instance. It should then copy all fields, using CopyContext.updateReference(T) to copy any reference fields.

A typical implementation of ICloneWithContext:

public static class MyClass implements ICloneWithContext {
    public MyClass(MyClass existingInstance, CopyContext context) {
        context.addObjectMapping(existingInstance, this);
        someReference = context.updateReference(existingInstance.someReference);
    }

    @Override
    public final Object clone(CopyContext context) {
        return new MyClass(this, context);
    }

    private Object someReference;
}

In general, all fields that are reference types should be copied with a call to CopyContext.updateReference(T). There are a couple of exceptions:

1. Fields that are aggregate parts of the object should always be copied. A referenced object is an aggregate if properties or methods on the object being copied can modify the externally-visible value of the referenced object.
2. If the semantics of the referenced object require that it have a single parent, owner, context, etc., and the object being copied is that parent, owner, or context, then the referenced object should always be copied.

If one of these exceptions applies, the CopyContext should be given an opportunity to update the reference before the reference is copied explicitly. Use CopyContext.updateReference(T) to update the reference. If CopyContext.updateReference(T) returns the original object, indicating that the context does not have a replacement registered, then copy the object manually by invoking a Clone method, a copy constructor, or by manually constructing a new instance and copying the values.

alwaysCopy = context.updateReference(existingInstance.alwaysCopy);
if (existingInstance.alwaysCopy != null && alwaysCopy == existingInstance.alwaysCopy) {
    alwaysCopy = (AlwaysCopy) existingInstance.alwaysCopy.clone(context);
}

If you are implementing an evaluator (a class that implements IEvaluator), the IEvaluator.updateEvaluatorReferences(agi.foundation.infrastructure.CopyContext) method shares some responsibilities with the copy context constructor. Code duplication can be avoided by doing the following:

1. For references to other evaluators ONLY, simply assign the reference in the constructor instead of calling CopyContext.updateReference(T). You should still call CopyContext.updateReference(T) on any references to non-evaluators.
2. Call IEvaluator.updateEvaluatorReferences(agi.foundation.infrastructure.CopyContext) as the last line in the constructor and pass it the same CopyContext passed to the constructor.
3. Implement IEvaluator.updateEvaluatorReferences(agi.foundation.infrastructure.CopyContext) as normal. See the reference documentation for IEvaluator.updateEvaluatorReferences(agi.foundation.infrastructure.CopyContext) for more information on implementing that method.

public MyClass(MyClass existingInstance, CopyContext context) {
    super(existingInstance, context);
    someReference = context.updateReference(existingInstance.someReference);
    evaluatorReference = existingInstance.evaluatorReference;
    updateEvaluatorReferences(context);
}

@Override
public void updateEvaluatorReferences(CopyContext context) {
    evaluatorReference = context.updateReference(evaluatorReference);
}

@Override
public Object clone(CopyContext context) {
    return new MyClass(this, context);
}

private Object someReference;
private IEvaluator evaluatorReference;

Specified by:

clone in interface ICloneWithContext

Specified by:

clone in class DefinitionalObject

Parameters:

context - The context to use to perform the copy.

Returns:

A new instance which is a copy of this object.

computeCurrentDefinitionHashCode

protected int computeCurrentDefinitionHashCode()

Computes a hash code based on the current properties of this object. Derived classes MUST override this method and compute a hash code that combines: a unique hash code seed, the base implementation result, and the hash codes of all new fields introduced by the derived class which are used in the DualPolarizedRadarReceivingAntennaExtension.checkForSameDefinition(agi.foundation.communications.antennas.BaseDualPolarizedReceivingAntennaExtension<agi.foundation.communications.antennas.RadioFrequencyGainPattern, agi.foundation.radar.RadarAntennaSignalProcessor>) method.

Overrides:

computeCurrentDefinitionHashCode in class BaseDualPolarizedReceivingAntennaExtension<RadioFrequencyGainPattern,RadarAntennaSignalProcessor>

Returns:

The computed hash code.

getAntennaNoiseTemperature

public final double getAntennaNoiseTemperature()

Gets the equivalent noise temperature for the antenna, in kelvin. It is used to model noise which comes from the antenna pointing at Earth's albedo and other effects prior to reaching the signal processors. It is added to any noise which is added during propagation.

setAntennaNoiseTemperature

public final void setAntennaNoiseTemperature(double value)

Sets the equivalent noise temperature for the antenna, in kelvin. It is used to model noise which comes from the antenna pointing at Earth's albedo and other effects prior to reaching the signal processors. It is added to any noise which is added during propagation.