The second vector used in establishing the frame. For a closed, bounded orbit (such as Earth-Moon), this should be the velocity vector of the Secondary Object. For alternately retro- and prograde motion (such as Earth-Mars), this should be a nearly constant vector, such as MJ2K Earth Ecliptic North.
Timing Precision Mode
This page describes functionality in millisecond timing precision mode.
Click here to see the documentation for this object in nanosecond timing precision mode.
Rotating-Pulsating Systems Guide