Click or drag to resize

AtmosphericDragForce Class

A simple model of atmospheric drag on a body according to its coefficient of drag and reference cross-sectional area. This model does not account for aerodynamic lift and is generally used for orbiting bodies which are perturbed by the atmosphere. The details of the model are specified by choosing which density model to use for the atmosphere.
Inheritance Hierarchy

Namespace:  AGI.Foundation.Celestial
Assembly:  AGI.Foundation.OrbitPropagation (in AGI.Foundation.OrbitPropagation.dll) Version: 19.2.399.0 (19.2.399.0)
Syntax
public class AtmosphericDragForce : ForceModel, 
	IPartialDifferentiable, IEquatableDefinition

The AtmosphericDragForce type exposes the following members.

Constructors
  NameDescription
Public methodAtmosphericDragForce

Initializes a Vector describing the drag force on an object.

The Density, ReferenceArea, and CoefficientOfDrag properties must be set before creating an Evaluator.

Protected methodAtmosphericDragForce(AtmosphericDragForce, CopyContext)
Initializes a new instance as a copy of an existing instance.
Public methodAtmosphericDragForce(ScalarAtmosphericDensity, Scalar, Scalar)
Initializes a Vector describing the drag force on an object.
Top
Properties
  NameDescription
Public propertyCoefficientOfDrag
Gets or sets the drag coefficient of the object.
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 object which calculates density at the object's location, note that this ScalarAtmosphericDensity also holds the central body and position data.
Public propertyDimension
Gets the dimension of the values produced by the object. For example, Vectors would have a dimension of three, and Scalars of one. A PartialDerivativesEvaluator created by this type will have a "RowDimension" equal to this property, and a "ColumnDimension equal to the summation of the dimensions of the independent variables that this object is dependent on.
Public propertyForceVector
Gets the Vector representation of this force.
(Inherited from ForceModel.)
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 propertyReferenceArea
Gets or sets the cross-sectional area of the object.
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 .
Top
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).)
Public methodStatic memberCalculateForce
Calculates the atmospheric drag force on an object. This low-level call is provided for convenience in simple use cases, in general you should call BuildForceEvaluator(ResultantForceBuilder, EvaluatorGroup) to produce a ForceEvaluator from this class that will model drag forces on an object over time.
Protected methodCheckForSameDefinition(AtmosphericDragForce)
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).
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).)
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 methodGetPartialDerivativesEvaluator
Gets an evaluator that calculates the partial derivatives of the atmospheric drag force with respect to any of the independentVariables parameters that apply.
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.)
Top
See Also