Satellite: Pointing Covariance (Projection)

Projection of the equal probability density ellipsoid defined by the pointing covariance matrix onto the plane perpendicular to the mean pointing direction. The data requires position covariance to be defined for the object and/or its target.

Type: Time-varying data

Availability: Reports | Graphs | Dynamic Displays | Strip Charts

Name Dimension Type Description
Time DateFormat Real Number Time.
Sigma Axis-1 AngleUnit Real Number Square root of the first diagonal component of the projected covariance matrix.
Sigma Axis-2 AngleUnit Real Number Square root of the second diagonal component of the projected covariance matrix.
1/(Inverted Sigma Axis-1) AngleUnit Real Number Square root of the inverse of the first diagonal element of the inverse of the projected covariance matrix.
1/(Inverted Sigma Axis-2) AngleUnit Real Number Square root of the inverse of the second diagonal element of the inverse of the projected covariance matrix.
Correlation 12 Unitless Real Number Correlation coefficient of the projected covariance matrix.
Major Sigma Dir Angle AngleUnit Real Number Angle between the major axis of the equal probability density ellipse and the first axis of the projection plane.
Major Sigma AngleUnit Real Number Square root of the maximum eigenvalue of the projected covariance matrix.
Minor Sigma AngleUnit Real Number Square root of the minimum eigenvalue of the projected covariance matrix.
Area Angle Squared Real Number Area of the equal probability density ellipse defined by the projected covariance matrix.
CEP AngleUnit Real Number "Circular error probable" - statistically equivalent circular representation for the elliptical equal probability density contour defined by the projected covariance matrix.

STK Programming Interface 11.0.1