Kelvin
Temperature Scale (K)  an absolute temperature scale in which
a change of 1 Kelvin equals a change of 1 degree Celsius; 0K is the lowest
temperature on the Kelvin scale.
Kinetic
energy  energy that a body has
as a result of its motion. Mathematically, it is defined as onehalf the
product of a body's mass and the square of its speed.
Kirchhoff's
law  at a given temperature,
a good absorber of a given wavelength is also a good emitter of that wavelength
Klystron
 the electronic component of the NEXRAD transmitter that generates
the coherent radiation necessary for the determination of Doppler velocities.
The WSR88D typically transmits its radiation using a power of 750,000
watts. Other commercial Doppler radars
sometimes use a Magnetron to generate the transmitted radiation. Magnetrons
typically generate less steady patterns of radiation than do Klystrons.
Knot
 the unit of speed in the nautical system; one nautical mile
per hour; it is equal to 1.1508 statute miles per hour or 0.5144 meters
per second
