Data Provider Groups | Data Provider Elements

Time Events

Reports data at specified event times.

Available for these objects: AdvCAT

Type: Interval data. Intended to be used only with elements from this same data provider.

Availability: Reports

Data Provider Groups

Note on Vehicle Local Coordinate Axes: In the following descriptions, the tangential (T) direction lies along the object's inertial velocity, the crosstrack (C) direction lies along the orbit normal, and the normal (N) direction completes the Cartesian triad, resulting in the TCN frame.

Note on the Ellipsoidal threat volume descriptions: If the threat volume type used in computation is Covariance, the primary (secondary) position error covariance matrix in the TCN frame can be constructed in the sigma-correlation form from the vehicle Ellipsoid Tangential, Crosstrack, Normal, CrossTrack-Tangential, Normal-Tangential and Normal-CrossTrack terms.

Name	Description
TimeIn	Data reported at the start time of each close approach event.
TCA	Data reported at the time of close approach for each close approach event. The actual time interval considered is determined through the range filter and may be a larger interval encompassing the close approach interval itself.
ConjTCA	Data reported at the time of close approach during each close approach interval.
TMS	Data reported at the time of minimum separation during each close approach event.
TimeOut	Data reported at the stop time of each close approach event.

Data Provider Elements

Name	Dimension	Type	Description
Event	Unitless	Text	Type of event (i.e., the name of the folder).
EventTime	Date	Real Number or Text	The time at which the event occurs.
Event Defn	Unitless	Text	The method of determining the event: Local Minimum, EndPoint Minimum, or Below Threshold.
Primary Name	Unitless	Text	The name of the primary object in the close approach event.
Primary SourceID	Unitless	Text	The identifier of the primary as used by the ephemeris source for the object. For example, the identifier for objects that use a GPS sem or yuma file is PRN-##.
Primary SSC	Unitless	Integer	The SSC number of the primary object involved in the close approach event.
Primary StringID	Unitless	Text	The string identifier of the primary object involved in the close approach event. If the object has no string identifier, then the value will be "Not Avail".
Primary NumberID	Unitless	Text	The number identifier of the primary object involved in the close approach event. If the object has no number identifier, then the value will be "Not Avail".
Primary Rev	Unitless	Integer	The rev (pass) number for the primary object.
Secondary Name	Unitless	Text	The name of the secondary object in the close approach event.
Secondary SourceID	Unitless	Text	The identifier of the secondary as used by the ephemeris source for the object. For example, the identifier for objects that use a GPS sem or yuma file is PRN-##.
Secondary SSC	Unitless	Integer	The SSC number of the secondary object involved in the close approach event.
Secondary StringID	Unitless	Text	The string identifier of the secondary object involved in the close approach event. If the object has no string identifier, then the value will be "Not Avail".
Secondary NumberID	Unitless	Text	The number identifier of the secondary object involved in the close approach event. If the object has no number identifier, then the value will be "Not Avail".
Secondary Rev	Unitless	Integer	The rev (pass) number for the secondary object.
Separation	Distance	Real Number or Text	The separation distance between the primary and secondary threat volumes at the given time. If the ellipsoids intersect, then the value will be "Intersect".
Range	Distance	Real Number	The range (i.e., distance between the primary and secondary object) at the given time.
Range Uncertainty	Distance	Real Number	The uncertainty in the range at the given time. The uncertainty is computed by treating the ellipsoid size and orientation as a measure of the position covariance for each object. The relative position covariance is then computed and projected onto the line of sight direction between the two objects to compute the value.
Range Sigma	Unitless	Real Number	The value of the range between the objects measured at TCA, expressed in terms of sigma (i.e., the scale factor by which the combined covariance ellipsoid would need to be scaled to just touch the range vector).
Range wrt Primary - Tangential	Distance	Real Number	The component of the relative position vector (i.e., secondary position vector minus primary position vector) in the primary object's tangential direction at the given time. The tangential direction lies along the object's inertial velocity.
Range wrt Primary - CrossTrack	Distance	Real Number	The component of the relative position vector (i.e., secondary position vector minus primary position vector) in the primary object's cross-track direction at the given time. The cross-track direction lies along the object's orbit normal.
Range wrt Primary - Normal	Distance	Real Number	The component of the relative position vector (i.e., secondary position vector minus primary position vector) in the primary object's normal direction at the given time. The normal direction completes a triad involving the tangential and cross-track directions and is akin to the radial direction.
Range wrt Primary - Radial	Distance	Real Number	The component of the relative position vector (i.e., secondary position vector minus primary position vector) in the primary object's radial direction at the given time.
Range wrt Primary - InTrack	Distance	Real Number	The component of the relative position vector (i.e., secondary position vector minus primary position vector) in the primary object's in-track direction at the given time. The in-track direction completes a triad involving the radial and cross-track directions.
Ellipsoid Norm wrt Primary	Unitless	Real Number or Text	A measure of the "distance" between the primary and secondary object, using the primary object's ellipsoid size as a norm, at the given time. If the primary ellipsoid size were to be scaled uniformly by this value, then the ellipsoid would just touch the secondary. The value is set to "Undefined" if an error occurs computing the norm.
Range wrt Secondary - Tangential	Distance	Real Number	The component of the relative position vector (i.e., primary position vector minus secondary position vector) in the secondary object's tangential direction at the given time. The tangential direction lies along the object's inertial velocity.
Range wrt Secondary - CrossTrack	Distance	Real Number	The component of the relative position vector (i.e., primary position vector minus secondary position vector) in the secondary object's cross-track direction at the given time. The cross-track direction lies along the object's orbit normal.
Range wrt Secondary - Normal	Distance	Real Number	The component of the relative position vector (i.e., primary position vector minus secondary position vector) in the secondary object's normal direction at the given time. The normal direction completes a triad involving the tangential and cross-track directions and is akin to the radial direction.
Range wrt Secondary - Radial	Distance	Real Number	The component of the relative position vector (i.e., primary position vector minus secondary position vector) in the secondary object's radial direction at the given time.
Range wrt Secondary - InTrack	Distance	Real Number	The component of the relative position vector (i.e., primary position vector minus secondary position vector) in the secondary object's in-track direction at the given time. The in-track direction completes a triad involving the radial and cross-track directions.
Ellipsoid Norm wrt Secondary	Unitless	Real Number or Text	A measure of the "distance" between the primary and secondary object, using the secondary object's ellipsoid size as a norm, at the given time. If the secondary ellipsoid size were to be scaled uniformly by this value, then the ellipsoid would just touch the primary. The value is set to "Undefined" if an error occurs computing the norm.
Relative Velocity	Rate	Real Number	The magnitude of the difference in the inertial velocities of the primary and secondary objects at the given time.
Approach Angle	Angle	Real Number or Text	The angle between the inertial velocity of the primary object and the inertial velocity of the secondary object at the given time.
Velocity wrt Primary - Tangential	Rate	Real Number	The component of the relative inertial velocity vector (i.e., secondary inertial velocity vector minus primary inertial velocity vector) in the primary object's tangential direction at the given time. The tangential direction lies along the object's inertial velocity.
Velocity wrt Primary - CrossTrack	Rate	Real Number	The component of the relative inertial velocity vector (i.e., secondary inertial velocity vector minus primary inertial velocity vector) in the primary object's cross-track direction at the given time. The cross-track direction lies along the object's orbit normal.
Velocity wrt Primary - Normal	Rate	Real Number	The component of the relative inertial velocity vector (i.e., secondary inertial velocity vector minus primary inertial velocity vector) in the primary object's normal direction at the given time. The normal direction completes a triad involving the tangential and cross-track directions and is akin to the radial direction.
Velocity wrt Primary - Radial	Rate	Real Number	The component of the relative inertial velocity vector (i.e., secondary inertial velocity vector minus primary inertial velocity vector) in the primary object's radial direction at the given time.
Velocity wrt Primary - InTrack	Rate	Real Number	The component of the relative inertial velocity vector (i.e., secondary inertial velocity vector minus primary inertial velocity vector) in the primary object's in-track direction at the given time. The in-track direction completes a triad involving the radial and cross-track directions.
Velocity wrt Secondary - Tangential	Rate	Real Number	The component of the relative inertial velocity vector (i.e., primary inertial velocity vector minus secondary inertial velocity vector) in the secondary object's tangential direction at the given time. The tangential direction lies along the object's inertial velocity.
Velocity wrt Secondary - CrossTrack	Rate	Real Number	The component of the relative inertial velocity vector (i.e., primary inertial velocity vector minus secondary inertial velocity vector) in the secondary object's cross-track direction at the given time. The cross-track direction lies along the object's orbit normal.
Velocity wrt Secondary - Normal	Rate	Real Number	The component of the relative inertial velocity vector (i.e., primary inertial velocity vector minus secondary inertial velocity vector) in the secondary object's normal direction at the given time. The normal direction completes a triad involving the tangential and cross-track directions and is akin to the radial direction.
Velocity wrt Secondary - Radial	Rate	Real Number	The component of the relative inertial velocity vector (i.e., primary inertial velocity vector minus secondary inertial velocity vector) in the secondary object's radial direction at the given time.
Velocity wrt Secondary - InTrack	Rate	Real Number	The component of the relative inertial velocity vector (i.e., primary inertial velocity vector minus secondary inertial velocity vector) in the secondary object's in-track direction at the given time. The in-track direction completes a triad involving the radial and cross-track directions.
Primary: Time Since Epoch	Time	Real Number	The difference between the given time and the primary object's epoch.
Primary x	Distance	Real Number	The X component of the inertial position vector of the primary object at the given time.
Primary y	Distance	Real Number	The Y component of the inertial position vector of the primary object at the given time.
Primary z	Distance	Real Number	The Z component of the inertial position vector of the primary object at the given time.
Primary Radius	Distance	Real Number	The magnitude of the position vector of the primary object.
Primary Lat	Latitude	Real Number or Text	The primary object's detic latitude at the given time.
Primary Lon	Longitude	Real Number or Text	The primary object's detic longitude at the given time.
Primary Alt	Distance	Real Number	The primary object's detic altitude at the given time.
Primary vx	Rate	Real Number	The X component of the inertial velocity vector of the primary object at the given time.
Primary vy	Rate	Real Number	The Y component of the inertial velocity vector of the primary object at the given time.
Primary vz	Rate	Real Number	The Z component of the inertial velocity vector of the primary object at the given time.
Primary Speed	Rate	Real Number	The magnitude of the inertial velocity vector of the primary object.
Primary Ellipsoid - Tangential	Distance	Real Number	For a Covariance class threat volume, this is the tangential position-estimation-error standard deviation for the primary vehicle. For other threat ellipsoid types expressed in the TCN principal axes frame, this is the length of the tangential-aligned semi-axis.
Primary Ellipsoid - CrossTrack	Distance	Real Number	For a Covariance class threat volume, this is the crosstrack position-estimation-error standard deviation for the primary vehicle. For other threat ellipsoid types expressed in the TCN principal axes frame, this is the length of the crosstrack-aligned semi-axis.
Primary Ellipsoid - Normal	Distance	Real Number	For a Covariance class threat volume, this is the normal position-estimation-error standard deviation for the primary vehicle. For other threat ellipsoid types expressed in the TCN principal axes frame, this is the length of the normal-aligned semi-axis.
Primary Ellipsoid - CrossTrack-Tangential	Unitless	Real Number	For a Covariance class threat volume, this is the correlation coefficient between the crosstrack and tangential position estimation errors for the primary vehicle.
Primary Ellipsoid - Normal-Tangential	Unitless	Real Number	For a Covariance class threat volume, this is the correlation coefficient between the normal and tangential position estimation errors for the primary vehicle.
Primary Ellipsoid - Normal-CrossTrack	Unitless	Real Number	For a Covariance class threat volume, this is the correlation coefficient between the normal and crosstrack position estimation errors for the primary vehicle.
Primary Ellipsoid - Max	Distance	Real Number	The length of the longest symmetry axis of the primary object's ellipsoid at the given time.
Primary Ellipsoid - Middle	Distance	Real Number	The length of the intermediate symmetry axis of the primary object's ellipsoid at the given time.
Primary Ellipsoid - Min	Distance	Real Number	The length of the shortest symmetry axis of the primary object's ellipsoid at the given time.
Primary Ellipsoid - CovMtx XX	Area	Real Number	The (1,1) component of the position covariance matrix for the primary obtained by interpreting the primary's ellipsoid size and orientation as that matrix's 1-sigma equal probability surface.
Primary Ellipsoid - CovMtx YX	Area	Real Number	The (2,1) component of the position covariance matrix for the primary obtained by interpreting the primary's ellipsoid size and orientation as that matrix's 1-sigma equal probability surface.
Primary Ellipsoid - CovMtx YY	Area	Real Number	The (2,2) component of the position covariance matrix for the primary obtained by interpreting the primary's ellipsoid size and orientation as that matrix's 1-sigma equal probability surface.
Primary Ellipsoid - CovMtx ZX	Area	Real Number	The (3,1) component of the position covariance matrix for the primary obtained by interpreting the primary's ellipsoid size and orientation as that matrix's 1-sigma equal probability surface.
Primary Ellipsoid - CovMtx ZY	Area	Real Number	The (3,2) component of the position covariance matrix for the primary obtained by interpreting the primary's ellipsoid size and orientation as that matrix's 1-sigma equal probability surface.
Primary Ellipsoid - CovMtx ZZ	Area	Real Number	The (3,3) component of the position covariance matrix for the primary obtained by interpreting the primary's ellipsoid size and orientation as that matrix's 1-sigma equal probability surface.
Primary Yaw	Angle	Real Number or Text	The yaw angle for the primary object's ellipsoid at the given time. The yaw angle locates from the tangential direction the projection of the major axis of the ellipsoid onto the plane whose normal is the cross-track direction.
Primary Pitch	Angle	Real Number or Text	The pitch angle for the primary object's ellipsoid at the given time. The pitch angle locates the major axis of the ellipsoid from the plane whose normal is the cross-track direction.
Primary Roll	Angle	Real Number or Text	The roll angle for the primary object's ellipsoid at the given time. The roll angle locates the minor axis of the ellipsoid as a rotation about the major axis, with zero being aligned with the cross-track direction.
Secondary: Time Since Epoch	Time	Real Number	The difference between the given time time and the secondary object's epoch.
Secondary x	Distance	Real Number	The X component of the inertial position vector of the secondary object at the given time.
Secondary y	Distance	Real Number	The Y component of the inertial position vector of the secondary object at the given time.
Secondary z	Distance	Real Number	The Z component of the inertial position vector of the secondary object at the given time.
Secondary Radius	Distance	Real Number	The magnitude of the position vector of the secondary object.
Secondary Lat	Latitude	Real Number or Text	The secondary object's detic latitude at the given time.
Secondary Lon	Longitude	Real Number or Text	The secondary object's detic longitude at the given time.
Secondary Alt	Distance	Real Number	The secondary object's detic altitude at the given time.
Secondary vx	Rate	Real Number	The X component of the inertial velocity vector of the secondary object at the given time.
Secondary vy	Rate	Real Number	The Y component of the inertial velocity vector of the secondary object at the given time.
Secondary vz	Rate	Real Number	The Z component of the inertial velocity vector of the secondary object at the given time.
Secondary Speed	Rate	Real Number	The magnitude of the inertial velocity vector of the secondary object.
Secondary Ellipsoid - Tangential	Distance	Real Number	For a Covariance class threat volume, this is the tangential position-estimation-error standard deviation for the secondary vehicle. For other threat ellipsoid types expressed in the TCN principal axes frame, this is the length of the tangential-aligned semi-axis.
Secondary Ellipsoid - CrossTrack	Distance	Real Number	For a Covariance class threat volume, this is the crosstrack position-estimation-error standard deviation for the secondary vehicle. For other threat ellipsoid types expressed in the TCN principal axes frame, this is the length of the crosstrack-aligned semi-axis.
Secondary Ellipsoid - Normal	Distance	Real Number	For a Covariance class threat volume, this is the normal position-estimation-error standard deviation for the secondary vehicle. For other threat ellipsoid types expressed in the TCN principal axes frame, this is the length of the normal-aligned semi-axis.
Secondary Ellipsoid - CrossTrack-Tangential	Unitless	Real Number	For a Covariance class threat volume, this is the correlation coefficient between the crosstrack and tangential position estimation errors for the secondary vehicle.
Secondary Ellipsoid - Normal-Tangential	Unitless	Real Number	For a Covariance class threat volume, this is the correlation coefficient between the normal and tangential position estimation errors for the secondary vehicle.
Secondary Ellipsoid - Normal-CrossTrack	Unitless	Real Number	For a Covariance class threat volume, this is the correlation coefficient between the normal and crosstrack position estimation errors for the secondary vehicle.
Secondary Ellipsoid - Max	Distance	Real Number	The length of the longest symmetry axis of the secondary object's ellipsoid at the given time.
Secondary Ellipsoid - Middle	Distance	Real Number	The length of the intermediate symmetry axis of the secondary object's ellipsoid at the given time.
Secondary Ellipsoid - Min	Distance	Real Number	The length of the shortest symmetry axis of the secondary object's ellipsoid at the given time.
Secondary Ellipsoid - CovMtx XX	Area	Real Number	The (1,1) component of the position covariance matrix for the secondary obtained by interpreting the secondary's ellipsoid size and orientation as that matrix's 1-sigma equal probability surface.
Secondary Ellipsoid - CovMtx YX	Area	Real Number	The (2,1) component of the position covariance matrix for the secondary obtained by interpreting the secondary's ellipsoid size and orientation as that matrix's 1-sigma equal probability surface.
Secondary Ellipsoid - CovMtx YY	Area	Real Number	The (2,2) component of the position covariance matrix for the secondary obtained by interpreting the secondary's ellipsoid size and orientation as that matrix's 1-sigma equal probability surface.
Secondary Ellipsoid - CovMtx ZX	Area	Real Number	The (3,1) component of the position covariance matrix for the secondary obtained by interpreting the secondary's ellipsoid size and orientation as that matrix's 1-sigma equal probability surface.
Secondary Ellipsoid - CovMtx ZY	Area	Real Number	The (3,2) component of the position covariance matrix for the secondary obtained by interpreting the secondary's ellipsoid size and orientation as that matrix's 1-sigma equal probability surface.
Secondary Ellipsoid - CovMtx ZZ	Area	Real Number	The (3,3) component of the position covariance matrix for the secondary obtained by interpreting the secondary's ellipsoid size and orientation as that matrix's 1-sigma equal probability surface.
Secondary Yaw	Angle	Real Number or Text	The yaw angle for the secondary object's ellipsoid at the given time. The yaw angle locates from the tangential direction the projection of the major axis of the ellipsoid onto the plane whose normal is the cross-track direction.
Secondary Pitch	Angle	Real Number or Text	The pitch angle for the secondary object's ellipsoid at the given time. The pitch angle locates the major axis of the ellipsoid from the plane whose normal is the cross-track direction.
Secondary Roll	Angle	Real Number or Text	The roll angle for the secondary object's ellipsoid at the given time. The roll angle locates the minor axis of the ellipsoid as a rotation about the major axis, with zero being aligned with the cross-track direction.