Sf

SF6
Chemical formula for Sulphur Hexafluoride.
SF6 Circuit Breaker
A circuit breaker that uses SF6 gas for its interrupting method.
Sferics
The study of atmospherics, especially from a meteorological point of view.
Sferics Fix
The estimated location of a source of atmospherics, presumably a lightning discharge.
Sferics Observation
An evaluation, from one or more sferics receivers, of the location of weather conditions with which lightning is associated.
Sferics Receiver
An instrument which measures, electronically, the direction of arrival, intensity, and rate of occurrence of atmospherics.