RainAttenuationModelItuRP838Version3 Class

ITU-R P.838 version 3 rain attenuation model. This model uses the ITU-R P.838 rain attenuation model to compute the specific attenuation (dB/km) for the propagated signal due to rain, then determines the total attenuation by multiplying by the path length of the link.

The atmospheric conditions can be configured in two different ways. When using RainHeight and RainRate, the link is divided into two sub-segments: the portion below the rain height, where the given rain rate applies, and the portion above the rain height, where no rain exists. This geometric arrangement is simple to configure, but is best suited to geometries where the link is primarily vertical.

Alternatively, configure CustomLinkSubdivision, which determines how the link should be subdivided, and CustomAtmosphericModel, which determines the rain rate at the midpoint of each sub-segment. Sub-segments can be regularly or irregularly spaced. The rain rate is assumed constant over each sub-segment. This configuration is more complex, but can represent geometries where the link is primarily horizontal and the signal might pass through multiple distinct weather cells.

Inheritance Hierarchy

SystemObject
  AGI.Foundation.InfrastructureDefinitionalObject
    AGI.Foundation.Communications.SignalPropagationSignalPropagationModel
      AGI.Foundation.Communications.SignalPropagationRainAttenuationModelItuRP838Version3

Namespace: AGI.Foundation.Communications.SignalPropagation
Assembly: AGI.Foundation.Communications (in AGI.Foundation.Communications.dll) Version: 24.1.418.0 (24.1.418.0)

Syntax

C++

Copy

public class RainAttenuationModelItuRP838Version3 : SignalPropagationModel

Public Class RainAttenuationModelItuRP838Version3
	Inherits SignalPropagationModel

public ref class RainAttenuationModelItuRP838Version3 : public SignalPropagationModel

type RainAttenuationModelItuRP838Version3 =  
    class
        inherit SignalPropagationModel
    end

The RainAttenuationModelItuRP838Version3 type exposes the following members.

Constructors

	Name	Description
	RainAttenuationModelItuRP838Version3	Constructs version 3 of the ITU-R P.838 model
	RainAttenuationModelItuRP838Version3(RainAttenuationModelItuRP838Version3, CopyContext)	Initializes a new instance as a copy of an existing instance.

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Properties

	Name	Description
	CentralBody	Gets the model's central body.
	CustomAtmosphericModel	Gets or sets a custom atmospheric model to use when computing attenuation. Note that this property is mutually exclusive with RainRate and configuring this property will replace any configured RainRate value.
	CustomLinkSubdivision	Gets or sets a custom object which will be used to subdivide the link into sub-segments, which will then define the sample locations where the CustomAtmosphericModel will be asked to obtain atmospheric data. Atmospheric conditions are assumed constant over each sub-segment. Note that this property is mutually exclusive with RainHeight and configuring this property will replace any configured RainHeight value.
	DefaultTauAngle	Gets or sets the default tau angle. This is the value used in case the transmitted signal is not polarized.
	IsFrozen	Gets a value indicating whether this object is frozen. A frozen object cannot be modified and an ObjectFrozenException will be thrown if an attempt is made to do so. (Inherited from DefinitionalObject.)
	RainHeight	Gets or sets a value for the rain height, in meters. This scalar will be provided with a service provider providing ILinkService. Note that this property is mutually exclusive with CustomLinkSubdivision, and this property cannot be used if a CustomLinkSubdivision is configured.
	RainRate	Gets or sets a custom value for the rain rate, in m/s. This scalar will be provided with a service provider providing ILinkService. Note that this property is mutually exclusive with CustomAtmosphericModel, and this property cannot be used if a CustomAtmosphericModel is configured.

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Methods

	Name	Description
	CheckForSameDefinition(DefinitionalObject)	Checks to determine if another instance has the same definition as this instance and returns 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 for all derived-class instances. Derived classes should check the type of other to preserve the symmetric nature of IsSameDefinition(Object). (Inherited from SignalPropagationModel.)
	CheckForSameDefinition(RainAttenuationModelItuRP838Version3)	Checks to determine if another instance has the same definition as this instance and returns 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 for all derived-class instances. Derived classes should check the type of other to preserve the symmetric nature of IsSameDefinition(Object).
	CheckForSameDefinition(SignalPropagationModel)	Checks to determine if another instance has the same definition as this instance and returns 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 for all derived-class instances. Derived classes should check the type of other to preserve the symmetric nature of IsSameDefinition(Object). (Overrides SignalPropagationModelCheckForSameDefinition(SignalPropagationModel).)
	Clone	Clones this object using the specified context. (Overrides DefinitionalObjectClone(CopyContext).)
	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 CheckForSameDefinition(DefinitionalObject) method. (Overrides SignalPropagationModelComputeCurrentDefinitionHashCode.)
	EnumerateDependencies	Enumerates the dependencies of this object by calling EnumerateT(T) for each object that this object directly depends upon. Derived classes which contain additional dependencies MUST override this method, call the base implementation, and enumerate dependencies introduced by the derived class. (Overrides DefinitionalObjectEnumerateDependencies(DependencyEnumerator).)
	Equals	Determines whether the specified object is equal to the current object. (Inherited from Object.)
	Finalize	Allows an object to try to free resources and perform other cleanup operations before it is reclaimed by garbage collection. (Inherited from Object.)
	Freeze	Freezes this object. Further attempts to modify it will result in an ObjectFrozenException. (Inherited from DefinitionalObject.)
	FreezeAggregatedObjects	Called by Freeze to also freeze any objects that are considered to be a part of this object. Derived classes which contain additional aggregated objects MUST override this method, call the base implementation, and freeze aggregated objects introduced by the derived class. The objects that need to be frozen in this method are frequently created in this object's constructor and are not settable via properties. (Inherited from DefinitionalObject.)
	GetDefinitionHashCode	Gets a hash code representing the definition of this object. (Inherited from DefinitionalObject.)
	GetHashCode	Serves as the default hash function. (Inherited from Object.)
	GetSignalPropagator	Get a propagator which can propagate a set of input signals. (Overrides SignalPropagationModelGetSignalPropagator(EvaluatorGroup, IServiceProvider).)
	GetType	Gets the Type of the current instance. (Inherited from Object.)
	IsSameDefinition	Determines if this object has the same definition as another object. (Inherited from DefinitionalObject.)
	MemberwiseClone	Creates a shallow copy of the current Object. (Inherited from Object.)
	ThrowIfFrozen	Throws ObjectFrozenException if this object IsFrozen. This method should be called from any method or property that modifies this object. (Inherited from DefinitionalObject.)
	ToString	Returns a string that represents the current object. (Inherited from Object.)

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Remarks

The tau angle, which is defined as the polarization tilt angle relative to the horizontal, is computed using the transmitted signal's polarization axes and is measured using the surface normal computed at the grazing location of the propagation link. If the transmitted signal does not contain a Polarization instance, the value returned by the DefaultTauAngle property is used as the tau angle. If the transmitted signal contains an instance of LeftHandCircularPolarization or RightHandCircularPolarization, the tau angle defaults to 45 degrees per the P.838 recommendation.

Reference

AGI.Foundation.Communications.SignalPropagation Namespace