Estimates of the dispersion angles from the Excalibur lasers were from 10−12 to 10−9. Estimates of  vary from about 10−5 to 10−2; that is, they have laser gain less than one.
The dispersion angles of the Excalibur lasers were estimated to be between 10−12 and 10−9 radians. The estimates for  varied from about 10−5 to 10−2 radians, indicating that their laser gain was less than one.