Data Provider Groups | Data Provider Elements

Shadow LLA

The location of the object's shadow on the object's central body surface, produced by the Sun at its apparent position as computed at the object's location.

Note that the shadow point is defined as the intersection on the object's central body the line emanating from the center of the apparent Sun toward the object. Thus, the effects of the finite size of the Sun are ignored. In addition, no light time delay is computed for the light traveling between the object and the intersection point.

Available for these objects: Aircraft, GroundVehicle, LaunchVehicle, Missile, Satellite, Ship

Type: Time-varying data.

Availability: Reports | Graphs | Dynamic Displays | Strip Charts

Data Provider Groups

Name	Description
TrueOfDateRotating	A variation of the Fixed system where pole wander is ignored. The equator is the same as the TrueOfDate equator and the frame spins about the TrueOfDate z-axis.
Fixed	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
Time	Date	Real Number or Text	Time.
Lat	Latitude	Real Number or Text	The detic latitude (i.e., angle between the detic subpoint's surface normal vector and the XY plane.).
Lon	Longitude	Real Number or Text	The detic longitude (i.e., angle from the X-axis locating the projection of the detic subpoint's surface normal vector onto the XY plane.) Longitude increases in the direction found using the right-hand rule about the Z-axis.
Alt	Distance	Real Number	The altitude value (i.e., magnitude of the relative position vector between the object and its detic subpoint).
UTM Zone	Unitless	Text	The UTM Zone character indicator for the detic subpoint. Available only when the central body is Earth.
UTM Easting	Distance	Real Number	The easting value within the UTM zone for the detic subpoint. Available only when the central body is Earth.
UTM Northing	Distance	Real Number	The northing value within the UTM zone for the detic subpoint. Available only when the central body is Earth.
MGRS Cell	Unitless	Text	The MGRS (Military Grid Reference System) code for the cell area containing the detic subpoint. Available only when the central body is Earth.