Definitions for "FGS"
Fine Guidance Sensor - Science/Guidance instruments. The FGS's are used in a "dual-purpose" mode serving to lock on to "guide stars" which help the telescope obtain the exceedingly accurate pointing necessary for observation of astronomical targets. These instruments can also be used to obtain highly accurate measurements of stellar positions.
MPEG-4 Fine Granular Scalability
FINE GUIDANCE SENSOR. A device sensitive to ultraviolet and visible light, used aboard the Hubble Space Telescope to detect guide stars astride the telescope's field of view, and thus to direct the telescope accurately toward a particular target.
Keywords:  florida, geological, survey
Florida Geological Survey