HOPKINS GLOSSARY OF WEATHER TERMS V

vector

• Any quantity that is described uniquely by both magnitude and direction at each point in space; compare with a scalar quantity. Examples of vectors include velocity and acceleration.

velocity

• A vector quantity representing the time rate of the change of position. The direction of motion and the magnitude (speed) of the velocity vector must be specified. Units of the magnitude of velocity are length per time, such as meters per second, or miles per hour.

Video Integrator and Processor (VIP)

visible sensor

• A device that can detect electromagnetic radiation with wavelengths that are in the visible portion of the electromagnetic radiation spectrum. Weather satellites use visible sensors or radiometers to produce visible images of the earth-atmosphere system. Contrast with a infrared sensor.