V band: Radar bandwidth from 46-56 GHz.
Value (colour): Degree of lightness, one of the attributes, along
with hue and saturation, that may be thought of as the dimensions of colour.
Also called intensity.
Variance: Variance of a random variable is the value of the square
of the deviation between that variable and its expected value. It is a measure
of the dispersion of the individual unit values about their mean.
Variogram: A graphical representation of spatial variance.