Data Provider Groups | Data Provider Elements
Position Covariance
Reports data about position covariance matrix including orientation of its principal axes relative to selected set of axes. Any set of axes defined in the Vector Geometry Tool is available for use, including user defined sets. The data requires position 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 X | DistanceUnit | Real Number | Square root of the first diagonal component of the covariance matrix. |
| Sigma Y | DistanceUnit | Real Number | Square root of the second diagonal component of the covariance matrix. |
| Sigma Z | DistanceUnit | Real Number | Square root of the third diagonal component of the covariance matrix. |
| Correlation XY | Unitless | Real Number | XY correlation coefficient of the covariance matrix. |
| Correlation XZ | Unitless | Real Number | XZ correlation coefficient of the covariance matrix. |
| Correlation YZ | Unitless | Real Number | YZ correlation coefficient of the covariance matrix. |
| PosCovMtx XX | Area | Real Number | XX Component of the Position Covariance Matrix. |
| PosCovMtx YX | Area | Real Number | YX Component of the Position Covariance Matrix. |
| PosCovMtx YY | Area | Real Number | YY Component of the Position Covariance Matrix. |
| PosCovMtx ZX | Area | Real Number | ZX Component of the Position Covariance Matrix. |
| PosCovMtx ZY | Area | Real Number | ZY Component of the Position Covariance Matrix. |
| PosCovMtx ZZ | Area | Real Number | ZZ Component of the Position 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 | The X component of the angular velocity vector, expressed in axes defined by the principal axes of the position covariance ellipsoid. The angular velocity measures the rate of change of the principal axes of the position covariance ellipsoid with respect to the selected set of axes. |
| wy | AngleRateUnit | Real Number | The Y component of the angular velocity vector, expressed in axes defined by the principal axes of the position covariance ellipsoid. The angular velocity measures the rate of change of the principal axes of the position covariance ellipsoid with respect to the selected set of axes. |
| wz | AngleRateUnit | Real Number | The Z component of the angular velocity vector, expressed in axes defined by the principal axes of the position covariance ellipsoid. The angular velocity measures the rate of change of the principal axes of the position covariance ellipsoid with respect to the selected set of axes. |
| w mag | AngleRateUnit | Real Number | Magnitude of the angular velocity vector. The angular velocity measures the rate of change of the principal axes of the position covariance ellipsoid with respect to the selected set 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. |