A measurement of atmospheric wind speed and direction made by tracking a balloon-borne target with radar; (also) the balloon-borne radar target, often combined with a radiosonde.
Origin
1940s. From ra- + win-. Compare rawinsonde.
Definition of rawin in US English:
rawin
nounˈreɪwɪn
Meteorology
A measurement of atmospheric wind speed and direction made by tracking a balloon-borne target with radar; (also) the balloon-borne radar target, often combined with a radiosonde.