From AMS Glossary
An analysis procedure, named after Vern Dvorak, for determining hurricane intensity from cloud patterns in satellite images.
Dvorak, V. F. 1975. Tropical cyclone intensity analysis and forecasting from satellite imagery. Mon. Wea. Rev.. 103. 420–430.
Dvorak, V. F. 1984. Tropical cyclone intensity analysis using satellite data. NOAA Technical Report NESDIS 11, U.S. Dept. of Commerce, Washington, D.C., . 47 pp.