Unit Descriptions

1 Arcsecond:1 Arcsecond is equal to exactly one thirtysix-hundredth arc degrees (1°/3600). In terms of radians (SI unit) this is π/648000 rad or approximately 4.848 137 x 10^-6 rad.

1 Angular Mil:1 Angular Mil equals exactly 2π/6400 radians. Radians (rad) are the SI unit for measuring a plane angle.