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spat
Symbol:  sp 
Category:  Solid angle 
SI Equivalent:  12.5664 sr
Dimension W 
 
Notes
1 sp = 4p steradians
Convert     sp  
1 sp =
Solid angle
  Symbol Unit Name
1.48511×108  sq '  square arcminute 
5.34638×1011  sq "  square arcsec 
4.12535×104  sq °  square degree 
12.5664  sr  steradian 
Glossary