RA dar DA ta P rocessor II, attached to some WSR-57 and WSR-74 radar units. It automatically controls the tilt sequence and computes several radar-derived quantities at regular intervals, including VIL , storm tops, accumulated rainfall, etc.
RADAP II
Meaning of RADAP II in English
A comprehensive English glossary of weather. Полный английский глоссарий погоды. 2012