1
[ noun ] half the maximum intensity

Used in print

(Cornell H. Mayer, "Radio Emission of the Moon...)

The half-intensity diameter of the antenna beam was about 9 ' , and the angle subtended by the moon included the entire main beam and part of the first side lobes .

The half-intensity diameter of the main lobe of the antenna was about 18 ' .5 , and the brightness temperature was reduced by assuming a Gaussian_shape for the antenna beam and a uniformly bright disk for the moon .

Related terms

intensity

*