Data Provider Elements

Position Covariance CrossSection Impact

Position Covariance CrossSection Impact computes cross-section of the position covariance ellipsoid in a plane perpendicular to the object's CBF velocity at the stop time (impact time). The resulting ellipse is projected further 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.

Available for these objects: Missile

Type: Fixed data.

Availability: Reports

Pre-data required: "<Scale> [<SEPProb>]"

Data Provider Elements

Name	Dimension	Type	Description
Time	Date	Real Number or Text	Time.
Sigma Axis-1	Distance	Real Number	Square root of the first diagonal component of the projected covariance matrix.
Sigma Axis-2	Distance	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)	Distance	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)	Distance	Real Number	Square root of the inverse of the second diagonal element of the inverse of the projected covariance matrix.
Major Sigma Azimuth	Angle	Real Number or Text	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	Distance	Real Number	Square root of the maximum eigenvalue of the projected covariance matrix.
Minor Sigma	Distance	Real Number	Square root of the minimum eigenvalue of the projected covariance matrix.
Area	Area	Real Number	Model area.
CEP	Distance	Real Number	"Circular error probable" - statistically equivalent circular representation for the elliptical equal probability density contour defined by the projected covariance matrix.