Star


Available Data Providers


Name Description
Active Constraints Lists the constraints that are considered when computing access for the object.
All Constraints Descriptions of all constraints available for this object and its parent object.
Angles Reports angle and its time rate of change rate. Angle must be defined in the Vector Geometry Tool.
Astrometric Data The astrometric parameters which serve as input to the stellar motion model including position at a specified epoch, proper motion and parallax.
Available Times The time intervals over which the object is available to participate in access computations.
Axes Choose Axes Reports the orientation and angular velocity of the selected set of axes relative to a chosen reference set of axes. The selected set of axes can be selected from any axes in the Vector Geometry Tool owned by the object; the reference axes may be chosen from any axes in the Vector Geometry Tool.
Configured Constraints Lists the constraints that are configured, i.e., those that could be used by the object when computing access. Only enabled constraints participate in the access computation; disabled constraints are ignored.
Crdn Available Times Time intervals for which a Vector Geometry Tool component for the object is available.
Data Provider Detail Data Provider Detail - hierarchically list the available data providers and all of the included elements.
Data Provider Summary Data Provider Summary - a list of all available data providers.
J2000 Cartesian Position The apparent direction of the star from the scenario's central body, expressed in J2000 components.
J2000 Position The apparent direction of the star from the scenario's central body, expressed in angles with respect to J2000 axes.
Parameter Set: Attitude The Attitude parameter set defines orientation of one set of Axes from VGT relative to another.

This parameter includes the following sub-sets: Quaternion, Euler, DCM and AngleAxis.

Quaternion includes four quaternion elements Q1, Q2, Q3, Q4.

Euler includes all 12 sequences where within each there are three angles: A, B, C.

DCM includes all nine elements of the direction cosine matrix; e.g., XX, XY, etc.

AngleAxis includes X, Y, Z components of the unit axis of rotation and RotationAngle.

Parameter Set: Vector The Vector parameter defines the position of one access object relative to the other. The position data can be reported in multiple different reference frames.
Physical Data Properties of the star.
Scalar Calculations Calculation component that produces scalar time-varying calculations.
User Supplied Data Values of custom data associated with the object.
Vector Choose Axes Reports the selected vector and its derivative in a specified reference set of axes. Both vector and axes must be defined in the Vector Geometry Tool.
Vector Choose Plane Reports projection of the selected vector and its derivative on a specified reference plane. Both vector and plane must be defined in the Vector Geometry Tool.
Vectors(Fixed) Reports the selected vector and its derivative in the object's central body fixed axes. The vector must be defined in the Vector Geometry Tool.
Vectors(ICRF) Reports the selected vector and its derivative in ICRF axes. The vector must be defined in the Vector Geometry Tool.
Vectors(Inertial) Reports the selected vector and its derivative in the object's central body inertial axes. The vector must be defined in the Vector Geometry Tool.
Vectors(J2000) Reports the selected vector and its derivative in J2000 axes. The vector must be defined in the Vector Geometry Tool.