Ceiling balloon
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. In the past, and sometimes today, a theodolite was used to track the balloon in order to determine the speed and direction of winds aloft.The principle behind the ceiling balloon is that timing of a balloon with a known ascent rate (how fast it climbs) from its release until it disappears into the clouds can be used to calculate the height of the bottom of the clouds.
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Ceiling balloon
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. In the past, and sometimes today, a theodolite was used to track the balloon in order to determine the speed and direction of winds aloft.The principle behind the ceiling balloon is that timing of a balloon with a known ascent rate (how fast it climbs) from its release until it disappears into the clouds can be used to calculate the height of the bottom of the clouds.
has abstract
A ceiling balloon also called ...... t of the bottom of the clouds.
@en
Een loodsballon is een ballon ...... n een wolk boven het maaiveld.
@nl
Ein Pilotballon wird von den M ...... n Höhenwinden bestimmt werden.
@de
Un ballon-plafond, ou ballon d ...... rapport météorologique METAR.
@fr
測雲気球（そくうんききゅう、英:Ceiling balloo ...... を吊るしてともし観測の目印にするが、行なわれることは少ない。
@ja
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685,891,137
comment
A ceiling balloon also called ...... t of the bottom of the clouds.
@en
Een loodsballon is een ballon ...... n een wolk boven het maaiveld.
@nl
Ein Pilotballon wird von den M ...... n Höhenwinden bestimmt werden.
@de
Un ballon-plafond, ou ballon d ...... (de l'anglais Pilot Balloon).
@fr
測雲気球（そくうんききゅう、英:Ceiling balloo ...... を吊るしてともし観測の目印にするが、行なわれることは少ない。
@ja
label
Ballon-plafond
@fr
Ceiling balloon
@en
Loodsballon
@nl
Pilotballon
@de
測雲気球
@ja
