PhaseCollocationOptions Object

The PhaseCollocationOptions object allows users to tune the collocation dynamical solver used with the TrajectoryPhase object.

Users cannot create instances of this type of object. However, users can access instances of this object type that have been created indirectly, for example as children of other objects. Users can also access any static properties and methods on this object type.

Available In Editions:

Timing Precision Mode

Name	Description	Attributes
Cd	The Coefficient of Drag is a property that is a function of the properties and shape of the spacecraft's area incident to the velocity direction. It is used in the calculation of the force on the spacecraft due to atmospheric Drag.	Type: Variable Access: Read/Write
Cl	The Coefficient of Lift is a property that is a function of the properties and shape of the spacecraft's area incident to the velocity direction. It is used in the calculation of the force on the spacecraft due to aerodynamic Lift.	Type: Variable Access: Read/Write
Cr	The Coefficient of Reflectivity is a property that is a function of the properties of the spacecraft's area incident to the Sun-Earth line. It is used in the calculation of the force on the spacecraft due to solar radiation pressure. Note that this value is only used when ForceModel.SRPForceGeometry is set to spherical. If using a plate model, the coefficients of reflectivity should be set for each individual plate.	Type: Variable Access: Read/Write
DeclaredName	The name of the object as declared.	Type: String Access: Read-Only
DisplayName	The name displayed for this object in output windows such as views, plots, and reports.	Type: String Access: Read/Write
DragArea	The Drag Area is the incident cross sectional area to the velocity direction. It is used in the calculation of the force on the spacecraft due to atmospheric Drag.	Type: Variable Access: Read/Write Units: m^2
ForceModel	The ForceModel used by the collocation transcription to evaluate state derivatives.	Type: ForceModel Access: Read-Only
LiftArea	The Lift Area is the incident cross sectional area to the velocity direction. It is used in the calculation of the force on the spacecraft due to atmospheric Lift.	Type: Variable Access: Read/Write Units: m^2
ObjectId	The unique identifier for the object.	Type: Variable Access: Read-Only
ObjectType	The type of the object.	Type: String Access: Read-Only
RelativeErrorTolerance	The relative error tolerance to use during mesh refinement when calling the CollocationOptions.RefineNodes method. This value is also used to determine error violation when a TrajectoryPhase element uses the 'Dynamical Error' coloring mode.	Type: Variable Access: Read/Write
SRPArea	The SRP Area is the incident cross sectional area to the Sun-Earth line. It is used in the calculation of the force on the spacecraft due to solar radiation pressure. If the Spacecraft's ForceModel.SRPForceGeometry is set to use a PlateModel, then this property will reflect the incident SRP area of the PlateModel, and an error will be reported if you try to assign a value to this property.	Type: Variable Access: Read/Write Units: m^2

Name	Description
ClearSavedStates	Clears previous saved states for this object.
GetAverageAccelerationDefect	Returns the average of the current acceleration defects across all collocation points. Note: Dynamical error can still exist in the trajectory path after the collocation defects have been driven to zero. See the 'CollocationOptions.RefineNodes' method for more information.
GetAverageMassFlowRateDefect	Returns the average of the current mass flow rate defects across all collocation points. Note: Dynamical error can still exist in the trajectory path after the collocation defects have been driven to zero. See the 'CollocationOptions.RefineNodes' method for more information.
GetAverageVelocityDefect	Returns the average of the current velocity defects across all collocation points. Note: Dynamical error can still exist in the trajectory path after the collocation defects have been driven to zero. See the 'CollocationOptions.RefineNodes' method for more information.
GetDefectValues	Returns a Matrix of the current values of the collocation defects. Each row corresponds to a collocation point of the phase and each columns correspond to a state element of the phase (position, velocity, mass). Note: Dynamical error can still exist in the trajectory path after the collocation defects have been driven to zero. See the 'CollocationOptions.RefineNodes' method for more information.
GetFromFile	Load the object state from the specified FreeFlyer object file.
GetFromString	Load the object state from the specified string.
PutToFile	Convert the object state to FreeFlyer object xml and write to a file.
PutToString	Convert the object state to FreeFlyer object xml and return as a string.
ReferenceEquals	Returns 1 if the argument refers to the calling object and 0 otherwise.
RefineMesh	Inserts TrajectoryNodes in areas of the TrajectoryPhase where dynamical error is detected. TrajectoryNodes will also be removed in areas where dynamical accuracy is excessive. If no dynamical error is detected that violates the 'CollocationOptions.RelativeErrorTolerance' property, then no nodes will be added. Dynamical error is computed by comparing the TrajectoryPhase path to the results of explicit integration using the RK89 propagator.
Restore	Restore an object's state from a previously saved state.
Save	Save the object's state so that it can be restored later.

PhaseCollocationOptions Object

Description

Available In Editions:

Timing Precision Mode