If you want to be specific, specify the solid angle [0] captured, in your prefered units, e.g 4π steradians = 41253 square degrees = 1 spat. [0] https://en.wik

If you want to be specific, specify the solid angle [0] captured, in your prefered units, e.g 4π steradians = 41253 square degrees = 1 spat. [0] https://en.wikipedia.org/wiki/Solid_angle https://en.wikipedia.org/wiki/Solid_angle