data obtained simultaneously over a wide area for
presenting a comprehensive picture of the state of
the atmosphere over a given period of time.
TACANTactical air navigation, a radio aircraft
navigation aid used originally by the military to
provide a pilot with direction and distance to a
TICType, intensity, character code used to describe
TRANSMISSOMETERAny device used to
measure the transmission of light through a
TROUGH(Sometimes spelled TROF) An elongated
area of low atmospheric pressure or heights
extending outward from a low center; the opposite
of a ridge. Also, the lowest portion of a wave cycle;
the dip between the wave crests.
UHFUltra--high frequency radio transmission.
UPSUniversal polar stereographic grid system used
by the military to locate positions in the polar
UTCCoordinated Universal Time, usually suffixed
with a "Z."
UTMUniversal transverse mercator coordinates; a
military coordinated system based on .a series of
grids used to locate positions between 84°N and
VEERINGA change in the wind direction in a
clockwise manner in the Northern Hemisphere, or a
counterclockwise manner in the Southern
VELOCIMETERIn general, a device used to
measure velocity (speed). In oceanography, the
sound velocimeter measures the speed of sound in
VERTREPVertical replenishment by use of
WANWide area network.
WBCWeather broadcast center.
WBGTWet--bulb globe temperature, a combined
reading of air temperature, wet--bulb temperature,
and a temperature inside a black--colored metal
(high heat absorbing) ball.
WEATHERThe state of the atmosphere with respect
to its effect upon life and human activities.
WEFAXAn acronym for weather facsimile,
specifically the NWS service providing satellite
imagery and graphic products via a geostationary
satellite data broadcast.
WMOWorld Meteorological Organization.
WPMWords per minute.
XBTExpendable bathythermograph, usually refers
to the probe that is dropped in the water and not
XSVExpendable sound velocimeter, usually refers to
the probe that is dropped in the water and not