Missile: Position Covariance Projection Impact

Position Covariance Projection Impact computes projection of the position covariance ellipsoid onto a plane perpendicular to the object's CBF velocity at the stop time (impact time). The resulting ellipse is projected futher along the CBF velocity which makes up an elliptical cylinder. The cylinder's intersection with the local horizontal plane makes the final ellipse which is reported by this data provider.

Type: Fixed data

Availability: Reports

Name Dimension Type Description
Time DateFormat Real Number Time.
Sigma Axis-1 DistanceUnit Real Number Square root of the first diagonal component of the projected covariance matrix.
Sigma Axis-2 DistanceUnit Real Number Square root of the second diagonal component of the projected covariance matrix.
Correlation 12 Unitless Real Number Correlation coefficient of the projected covariance matrix.
1/(Inverted Sigma Axis-1) DistanceUnit 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) DistanceUnit Real Number Square root of the inverse of the second diagonal element of the inverse of the projected covariance matrix.
Major Sigma Azimuth AngleUnit Real Number Major Sigma Azimuth reports azimuth angle of the direction of the major sigma (the largest dimension) of the ellipse in the local horizontal plane.
Major Sigma DistanceUnit Real Number Square root of the maximum eigenvalue of the projected covariance matrix.
Minor Sigma DistanceUnit Real Number Square root of the minimum eigenvalue of the projected covariance matrix.
Area Area Real Number Model area.
CEP DistanceUnit 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