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. Note: This data provider does not support interpolation of the position/velocity covariance matrices. Output is limited to the times of the stored ephemeris points.
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 | DateFormat | Real Number | 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 | AngleUnit | Real Number | 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 | AngleUnit | Real Number | 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 | AngleUnit | Real Number | 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 | AngleUnit | Real Number | 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 | AngleUnit | Real Number | 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 | AngleUnit | Real Number | 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 | AngleRateUnit | 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 | AngleRateUnit | 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 | AngleRateUnit | 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 | AngleRateUnit | 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 | AngleUnit | Real Number | 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 | AngleUnit | Real Number | 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 | AngleUnit | Real Number | 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. |