Data Providers: Chain: TCA Ephemeris Data

Reports data at the time of closest approach over each strand access interval, for all strands that have just two objects. The 'From-object' is the first object listed in the strand; the 'To-object' is the second object listed. Values are reported for each strand access interval that lies within the requested report intervals.

Name	Dimension	Type	Description
Strand Name	Unitless	Text	The name of object.
Time of Closest Approach	DateFormat	Real Number	The time during each strand access interval at which the closest approach occurs (i.e., the range between the objects is at a minimum).
Range	DistanceUnit	Real Number	The range (i.e., distance between the primary and secondary object) at the given time.
From Object-X	DistanceUnit	Real Number	The X component of the position vector at the time of closest approach of the From-object expressed in the object's central body Fixed coordinate system.
From Object-Y	DistanceUnit	Real Number	The Y component of the position vector at the time of closest approach of the From-object expressed in the object's central body Fixed coordinate system.
From Object-Z	DistanceUnit	Real Number	The Z component of the position vector at the time of closest approach of the From-object expressed in the object's central body Fixed coordinate system.
From Object-vX	Rate	Real Number	The X component of the velocity vector at the time of closest approach of the From-object as observed in the object's central body Fixed coordinate system and expressed using those components.
From Object-vY	Rate	Real Number	The Y component of the velocity vector at the time of closest approach of the From-object as observed in the object's central body Fixed coordinate system and expressed using those components.
From Object-vZ	Rate	Real Number	The Z component of the velocity vector at the time of closest approach of the From-object as observed in the object's central body Fixed coordinate system and expressed using those components.
To Object-X	DistanceUnit	Real Number	The X component of the position vector at the time of closest approach of the To-object expressed in the object's central body Fixed coordinate system.
To Object-Y	DistanceUnit	Real Number	The Y component of the position vector at the time of closest approach of the To-object expressed in the object's central body Fixed coordinate system.
To Object-Z	DistanceUnit	Real Number	The Z component of the position vector at the time of closest approach of the To-object expressed in the object's central body Fixed coordinate system.
To Object-vX	Rate	Real Number	The X component of the velocity vector at the time of closest approach of the To-object as observed in the object's central body Fixed coordinate system and expressed using those components.
To Object-vY	Rate	Real Number	The Y component of the velocity vector at the time of closest approach of the To-object as observed in the object's central body Fixed coordinate system and expressed using those components.
To Object-vZ	Rate	Real Number	The Z component of the velocity vector at the time of closest approach of the To-object as observed in the object's central body Fixed coordinate system and expressed using those components.

Name

Dimension

Type

Description

Strand Name

Unitless

Text

The name of object.

Time of Closest Approach

DateFormat

Real Number

The time during each strand access interval at which the closest approach occurs (i.e., the range between the objects is at a minimum).

Range

DistanceUnit

Real Number

The range (i.e., distance between the primary and secondary object) at the given time.

From Object-X

DistanceUnit

Real Number

The X component of the position vector at the time of closest approach of the From-object expressed in the object's central body Fixed coordinate system.

From Object-Y

DistanceUnit

Real Number

The Y component of the position vector at the time of closest approach of the From-object expressed in the object's central body Fixed coordinate system.

From Object-Z

DistanceUnit

Real Number

The Z component of the position vector at the time of closest approach of the From-object expressed in the object's central body Fixed coordinate system.

From Object-vX

Rate

Real Number

The X component of the velocity vector at the time of closest approach of the From-object as observed in the object's central body Fixed coordinate system and expressed using those components.

From Object-vY

Rate

Real Number

The Y component of the velocity vector at the time of closest approach of the From-object as observed in the object's central body Fixed coordinate system and expressed using those components.

From Object-vZ

Rate

Real Number

The Z component of the velocity vector at the time of closest approach of the From-object as observed in the object's central body Fixed coordinate system and expressed using those components.

To Object-X

DistanceUnit

Real Number

The X component of the position vector at the time of closest approach of the To-object expressed in the object's central body Fixed coordinate system.

To Object-Y

DistanceUnit

Real Number

The Y component of the position vector at the time of closest approach of the To-object expressed in the object's central body Fixed coordinate system.

To Object-Z

DistanceUnit

Real Number

The Z component of the position vector at the time of closest approach of the To-object expressed in the object's central body Fixed coordinate system.

To Object-vX

Rate

Real Number

The X component of the velocity vector at the time of closest approach of the To-object as observed in the object's central body Fixed coordinate system and expressed using those components.

To Object-vY

Rate

Real Number

The Y component of the velocity vector at the time of closest approach of the To-object as observed in the object's central body Fixed coordinate system and expressed using those components.

To Object-vZ

Rate

Real Number

The Z component of the velocity vector at the time of closest approach of the To-object as observed in the object's central body Fixed coordinate system and expressed using those components.