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NPlateAtmosphericDragForce Class

A medium-fidelity force model for atmospheric drag on a spacecraft. The model requires that a spacecraft's attitude be specified by its body axes, the spacecraft's body and solar panels be modeled by an N-Plate model that contains a model for each outward facing surface of the spacecraft, and the atmospheric density is modeled by a density model.

This model does not take into account the effect of plates physically blocking other plates from experiencing drag if the blocked plates are behind them but pointing in the same direction.

Inheritance Hierarchy

Namespace:  AGI.Foundation.Celestial
Assembly:  AGI.Foundation.OrbitPropagation (in AGI.Foundation.OrbitPropagation.dll) Version: 24.2.419.0 (24.2.419.0)
Syntax
public class NPlateAtmosphericDragForce : ForceModel

The NPlateAtmosphericDragForce type exposes the following members.

Constructors
  NameDescription
Public methodNPlateAtmosphericDragForce

Initializes a ForceModel describing the atmospheric drag force on an object.

The NPlateModel, BodyAxes, Density, and IlluminatingBody properties must be set before creating an evaluator.

Protected methodNPlateAtmosphericDragForce(NPlateAtmosphericDragForce, CopyContext)
Initializes a new instance of the NPlateAtmosphericDragForce class
Public methodNPlateAtmosphericDragForce(NPlateModel, Axes, ScalarAtmosphericDensity, CentralBody)
Initializes a ForceModel describing the atmospheric drag force on an object.
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Properties
  NameDescription
Public propertyBodyAxes
Gets or sets the axes defining the orientation of the spacecraft body.
Public propertyDefinedInAxes
Gets the Axes in which this force is defined. For drag, the Axes are taken from the fixed frame of the CentralBody used for the Density. Also note that while the drag force is defined in the fixed frame, forces are considered to be "inertial" for the purposes of Newtonian kinematics, and no kinematic transformation apart from a simple rotation is necessary when converting to an inertial frame. If the Density property is , then this property will also return .
Public propertyDensity
Gets or sets the atmospheric model used to calculate density at the location of the TargetPoint.
Public propertyForceVector
Gets the Vector representation of this force.
(Inherited from ForceModel.)
Public propertyIlluminatingBody
Gets or sets the body that is used to determine the direction that solar panel plates face (typically, the Sun).
Public propertyIsFrozen
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.)
Public propertyKind
Gets an enumeration indicating the nature of this force and whether it implicitly includes mass.
(Inherited from ForceModel.)
Public propertyNPlateModel
Gets or sets a collection that models the spacecraft's body as a collection of individual plates with oriented surface areas and drag coefficients. All plates in this collection must be DragPlates.
Public propertyRole
Gets the role that this force plays in a combined resultant force. In particular, it indicates whether this force is dominant and easy to compute or whether it is a small perturbation that is expensive to compute.
(Inherited from ForceModel.)
Public propertyTargetPoint
Gets the point at which the drag is applied from the TargetPoint of the Density. If the Density property is , then this property will also return .
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Methods
  NameDescription
Public methodBuildForceEvaluator
Build lists of principal and perturbation forces based on this model in order to create an overall resultant force.
(Overrides ForceModelBuildForceEvaluator(ResultantForceBuilder, EvaluatorGroup).)
Protected methodCheckForSameDefinition(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 ForceModel.)
Protected methodCheckForSameDefinition(ForceModel)
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 ForceModelCheckForSameDefinition(ForceModel).)
Protected methodCheckForSameDefinition(NPlateAtmosphericDragForce)
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).
Public methodClone
Clones this object using the specified context.
(Overrides DefinitionalObjectClone(CopyContext).)
Protected methodComputeCurrentDefinitionHashCode
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 ForceModelComputeCurrentDefinitionHashCode.)
Public methodEnumerateDependencies
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 ForceModelEnumerateDependencies(DependencyEnumerator).)
Public methodEquals
Determines whether the specified object is equal to the current object.
(Inherited from Object.)
Protected methodFinalize
Allows an object to try to free resources and perform other cleanup operations before it is reclaimed by garbage collection.
(Inherited from Object.)
Public methodFreeze
Freezes this object. Further attempts to modify it will result in an ObjectFrozenException.
(Inherited from DefinitionalObject.)
Protected methodFreezeAggregatedObjects
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 ForceModel.)
Public methodGetDefinitionHashCode
Gets a hash code representing the definition of this object.
(Inherited from DefinitionalObject.)
Public methodGetForceEvaluator
Gets an instance of an evaluator that can compute the force.
(Inherited from ForceModel.)
Public methodGetForceEvaluator(EvaluatorGroup)
Gets an instance of an evaluator that can compute the force.
(Inherited from ForceModel.)
Public methodGetHashCode
Serves as the default hash function.
(Inherited from Object.)
Public methodGetType
Gets the Type of the current instance.
(Inherited from Object.)
Public methodIsSameDefinition
Determines if this object has the same definition as another object.
(Inherited from DefinitionalObject.)
Protected methodMemberwiseClone
Creates a shallow copy of the current Object.
(Inherited from Object.)
Protected methodThrowIfFrozen
Throws ObjectFrozenException if this object IsFrozen. This method should be called from any method or property that modifies this object.
(Inherited from DefinitionalObject.)
Public methodToString
Returns a string that represents the current object.
(Inherited from Object.)
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See Also