Data Provider Groups | Data Provider Elements

Terrain Info

The ground slope information of based on the data input in the basic properties of the object. This data is not derived from terrain specified via DTED. The slope and azimuth are always reported in the topocentric frame.

Available for these objects: Facility, Place, Target

Type: Fixed data.

Availability: Reports

Data Provider Groups

Name	Description
LocalHorizontal	Local horizontal frame. This frame has the Z axis aligned with the inward surface normal direction (minus Z is up) and the X axis constrained toward the local north direction.
Topocentric	This frame has the Z axis aligned with the outward surface normal direction and the X axis constrained toward the local north direction.
CBF	A coordinate system attached to the central body and rotating with it. The z-axis is nominally along the rotation axis.

Data Provider Elements

Name	Dimension	Type	Description
Normal x	Unitless	Real Number	First component of the unit vector along the normal to the selected plane in the reference coordinate system. Defines projection of the unit vector onto the x-axis of the reference coordinate system.
Normal y	Unitless	Real Number	Second component of the unit vector along the normal to the selected plane in the reference coordinate system. Defines projection of the unit vector onto the y-axis of the reference coordinate system.
Normal z	Unitless	Real Number	Third component of the unit vector along the normal to the selected plane in the reference coordinate system. Defines projection of the unit vector onto the z-axis of the reference coordinate system.
Slope	Angle	Real Number or Text	The slope of the ground relative to the local horizontal plane. Zero indicates level ground. Value is independent of selected coordinate system.
Azimuth	Longitude	Real Number or Text	Dihedral angle between north vector and velocity vector about the detic nadir vector. The velocity vector is the velocity of the object, as observed in the object's central body fixed coordinate system.