Field            Meaning
---------------- --------------------------------------------------------------
GMT              Greenwich Mean Time.
LAT/LONG         Latitude and Longitude of spacecraft.
ALT              Altitude of spacecraft in nautical miles.
ORB              Orbit number.
SUN AZM          Angle from north clockwise to the Sun measured at nadir.
SUN ELE          Angle between the horizon and the Sun.
SUNGLINT ANG     Elevation of the Sun at the glint point.
SUNGLINT RNG     Distance in nautical miles from nadir to the glint point.
GLORY RNG        Distance in nautical miles from nadir to the spacecraft shadow.

Terms
-----
Sun Glint: 
Spot on the Earth where the Sun's reflection is visible from the spacecraft.

Nadir: 
The spacecraft's sub satellite point.  The spot on the Earth directly below the
spacecraft.