bn:00062425n
Noun Concept
Categories: Meteorological instrumentation and equipment
EN
pilot balloon  ceiling balloon  pibal  Pilot weather balloon
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EN
A ceiling balloon also called a pilot balloon or pibal, is used by meteorologists to determine the height of the base of clouds above ground level during daylight hours. Wikipedia
A pilot balloon. Wiktionary
A small unmanned balloon whose ascent is followed by a theodolite to obtain data for the computation of the speed and direction of winds in the upper air. Wiktionary
Balloon to obtain data for winds. Wiktionary (translation)
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