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 one-half 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 WSR-88D 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
|