The mean equator mean equinox coordinate
system evaluated at the beginning of the Besselian year 1950 (31
December 1949 22:09:46.866 = JD 2433282.4234591).
| Name |
Dimension |
Type |
Description |
| Time |
DateFormat |
Real Number |
Time. |
| Detic Lat |
AngleUnit |
Real Number |
The detic latitude (i.e., angle between the detic
subpoint's surface normal vector and the XY plane.) |
| Detic Lon |
LongitudeUnit |
Real Number |
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. |
| Detic Alt |
DistanceUnit |
Real Number |
The altitude value (i.e., magnitude of the relative
position vector between the object and its detic subpoint). |
| Horiz Flt Path
Ang |
AngleUnit |
Real Number |
The angle between the position vector and the plane
whose normal is the velocity vector. |
| Flt Path Azi |
LongitudeUnit |
Real Number |
The angle, measured in the plane perpendicular to
the position vector, between the local north direction and the
projection of the velocity vector onto that plane, measured as
positive moving toward local east. |
| Velocity |
Rate |
Real Number |
The magnitude of the velocity vector, as observed
in the object's central body fixed coordinate system. |