Data Provider Groups | Data Provider Elements

Velocity Projected Covariance

Provides data about velocity covariance matrix relative to selected set of axes. The covariance is transformed into the requested reference frame using a 3x3 coordinate transformation matrix. The result of this transformation is that the original covariance is simply expressed relative to the new axes and the effects of the rotation of the axes are ignored. Any set of axes defined in the Vector Geometry Tool is available for use, including user defined sets. The data requires position/velocity covariance to be defined for the object.

Available for these objects: LaunchVehicle, Missile, Satellite

Type: Time-varying data.

Availability: Reports | Graphs | Dynamic Displays | Strip Charts

Data Provider Groups

Any Axes component owned by the object is available for use, including user defined ones. Use the Analysis Workbench listing or the Report Manager->Report Content Properties tool to determine the actual set of components that can be used for a specific object.

Data Provider Elements

Name	Dimension	Type	Description
Time	Date	Real Number or Text	Time.
Sigma Xd	Rate	Real Number	Square root of the fourth diagonal component of the covariance matrix.
Sigma Yd	Rate	Real Number	Square root of the fifth diagonal component of the covariance matrix.
Sigma Zd	Rate	Real Number	Square root of the sixth diagonal component of the covariance matrix.
Correlation XdYd	Unitless	Real Number	XdYd correlation coefficient of the covariance matrix.
Correlation XdZd	Unitless	Real Number	XdZd correlation coefficient of the covariance matrix.
Correlation YdZd	Unitless	Real Number	YdZd correlation coefficient of the covariance matrix.
VelCovMtx XX	Rate Squared	Real Number	XX Component of the Velocity Covariance Matrix.
VelCovMtx YX	Rate Squared	Real Number	YX Component of the Velocity Covariance Matrix.
VelCovMtx YY	Rate Squared	Real Number	YY Component of the Velocity Covariance Matrix.
VelCovMtx ZX	Rate Squared	Real Number	ZX Component of the Velocity Covariance Matrix.
VelCovMtx ZY	Rate Squared	Real Number	ZY Component of the Velocity Covariance Matrix.
VelCovMtx ZZ	Rate Squared	Real Number	ZZ Component of the Velocity Covariance Matrix.
YPR321 yaw	Angle	Real Number or Text	Yaw angle between the two sets of axes. Defines rotation about the z-axis of the reference set, which occurs first when using 321 (or YPR) sequence in YPR angles representation.
YPR321 pitch	Angle	Real Number or Text	Pitch angle between the two sets of axes. Defines rotation about the y-axis of the reference set, which occurs second when using 321 (or YPR) sequence in YPR angles representation.
YPR321 roll	Angle	Real Number or Text	Roll angle between the two sets of axes. Defines rotation about the x-axis of the reference set, which occurs third when using 321 (or YPR) sequence in YPR angles representation.
Euler323 precession	Angle	Real Number or Text	Precession angle between the two sets of axes. Defines rotation about the z-axis of the reference set, which occurs first when using 323 sequence in Euler angles representation.
Euler323 nutation	Angle	Real Number or Text	Nutation angle between the two sets of axes. Defines rotation about the y-axis of the set rotated through precession, which occurs second when using 323 sequence in Euler angles representation.
Euler323 spin	Angle	Real Number or Text	Spin angle between the two sets of axes. Defines rotation about the z-axis of the set rotated through precession and nutation, which occurs third when using 323 sequence in Euler angles representation.
q1	Unitless	Real Number	First element of quaternion (and of its vector part) representing the orientation between the two sets of axes.
q2	Unitless	Real Number	Second element of quaternion (and of its vector part) representing the orientation between the two sets of axes.
q3	Unitless	Real Number	Third element of quaternion (and of its vector part) representing the orientation between the two sets of axes.
q4	Unitless	Real Number	Fourth element of quaternion (its scalar part) representing the orientation between the two sets of axes.
wx	AngleRate	Real Number	First component of angular velocity vector between the two sets of axes. Represents projection of angular velocity vector onto x-axis of the selected set.
wy	AngleRate	Real Number	Second component of angular velocity vector between the two sets of axes. Represents projection of angular velocity vector onto y-axis of the selected set.
wz	AngleRate	Real Number	Third component of angular velocity vector between the two sets of axes. Represents projection of angular velocity vector onto z-axis of the selected set.
w mag	AngleRate	Real Number	Magnitude of angular velocity vector between the two sets of axes. Represents relative speed of rotation between the two sets of axes.
RightAscension of w	Angle	Real Number or Text	Right ascension of angular velocity vector between the two sets of axes. Represents the angle between the x-axis of the selected set and projection of the angular velocity vector onto the xy-plane of the selected set. The angle is measured counterclockwise about the z-axis of the selected set.
Declination of w	Angle	Real Number or Text	Declination of angular velocity vector between the two sets of axes. Represents the angle between the angular velocity vector and its projection onto the xy-plane of the selected set. The angle is positive when the angular velocity vector is directed toward positive z-axis of the selected set.
Eigen-Angle	Angle	Real Number or Text	Angle of eigen-rotation between the two sets of axes, i.e. a single axis rotation that aligns the two sets of axes.
Eigen-Axis x	Unitless	Real Number	First component of a unit vector representing the axis of eigen-rotation between the two sets of axes. Defines instantaneous projection of the eigen-axis onto x-axis of either of the two sets of axes.
Eigen-Axis y	Unitless	Real Number	Second component of a unit vector representing the axis of eigen-rotation between the two sets of axes. Defines instantaneous projection of the eigen-axis onto y-axis of either of the two sets of axes.
Eigen-Axis z	Unitless	Real Number	Third component of a unit vector representing the axis of eigen-rotation between the two sets of axes. Defines instantaneous projection of the eigen-axis onto z-axis of either of the two sets of axes.