Spat (angular unit)


The spat (symbol sp[1]), from the Latin spatium ("space"), is a unit of solid angle.[2][3] 1 spat is equal to 4π steradians[1][3] or approximately 41253 square degrees of solid angle (sequence A125560 in the OEIS).[2] Thus it is the solid angle subtended by a complete sphere at its center.[2]

See also



  1. ^ a b The Ultimate Online Reference for Engineers. Sunnyvale, California, USA: eFunda Inc. Retrieved 2015-10-19.
  2. ^ a b c Rowlett, Russ (2004). "A Dictionary of Units of Measurement". Chapel Hill: University of North Carolina. Retrieved 2015-10-16.
  3. ^ a b Glossary » Units » Solid Angle » Spat. Sunnyvale, California, USA: eFunda Inc.