a special PV mounting rack that follows the path of the sun
a very sophisticated infrared video device that follows even the smallest movements of the eye during the surgical process
A tracker is a positional device used to tell where something is in space. Some background: In a PC desktop environment the mouse is usually the only tracking system available, with tracking done in 2 space (x,y coordinates). This kind of device is usually not popularly desired by immersive VR enthusiests, but is quite effective in entertainment applications such as Id Software's Quake (the very popular keyboard/mouse combination is even sold as an add-on to console systems such as SegaDreamcast and Playstation2). In VR a tracker gives you position information usually in 3 space (x,y,z coordinates). Generally the VR tracker is attached to the body or held in the hand to let the computer know where you are in space thereby allowing the VR system to "track" you. Some popular VR tracking devices are the Wand or Glove, both of which typically use both digital (button) input and positional (tracking) input. Almost always tracking input is used in conjunction with button input, as seen in many devices such as Wand, Glove, and even the Mouse.
in solar electric and solar thermal systems, a device used to track the sun.
any device used to direct a PV array toward the sun.
A device that emits numeric coordinates representing its position and orientation in space.
brand of security tracking device