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This information can be obtained during vertical ascent of the balloon when it is in atmosphere or during its motion when it reaches the maximum [url=http://www.rtnagel.com/airjordan.php]nike air jordan pas cher[/url] altitude. Including the weather balloons, weather [url=http://www.teatrodeoro.com/hollisterde.php]hollister deutschland[/url] information are also gathered using many other types of devices., These weather balloons are filled with Helium which is less dense than the air and hence the weather is inflated with this. The ceiling balloons are the smallest size of weather balloons and this is used to determine the height of the base to clouds above the ground levels during day time. The main purpose to use ceiling balloons are to know [url=http://www.osterblade.com]moncler outlet[/url] ascent rate and also to know how long could the balloons rises until it gets disappears in to clouds. It is possible to calculate [url=http://www.giuseppezanottipaschere.com]giuseppe zanotti soldes[/url] this by the ascent rate times which will give the cloud's ceiling height from ground level. Usually the ceiling measures about 76mm x 40 cm diameters. As the clouds [url=http://www.fibmilano.it]woolrich[/url] base is not always flat and solid, its not decided when the weather balloon disappear it's when the colour of the balloon started fading up. Though the ceiling balloon is simple, safe and reliable, observer must be aware of the things around. i.e., Rain and wet snow might slow down the ascent of the balloon, thus giving [url=http://www.davidhabchy.com]barbour sale[/url] the false ceiling and poor visibility to the observer. The pilot balloons are also used for measuring the ceiling height [url=http://www.agentparadise.com]woolrich outlet[/url] of the clouds from ground level. This works similar to the ceiling balloons.

In order to send the information about humidity, pressure, temperature in the atmosphere, Sounding balloons which [url=http://www.tagverts.com/barbour.php]barbour online shop[/url] is also an high altitude weather balloons are used and it features a device called radiosonde for measuring. This global positioning [url=http://www.sandvikfw.net/shopuk.php]hollister outlet sale[/url] system which is the satellite based is thus used to know more information about wind. The sounding balloon itself carries the flexible latex material. This unit is then made to hang to the string's lower end and it is known as radiosonde. Specialized radiosonde is used for determining different parameters in the atmosphere such as ozone concentration. Though [url=http://www.teatrodeoro.com/hollisterde.php]hollister[/url] helium is used to fill these balloons, hydrogen is generally used. Since hydrogen is available at less cost it is used.

The weather balloons will reach an altitude of 40 km and it is limited by diminishing pressure that causes [url=http://www.par5club.com/louboutin.php]louboutin[/url] the balloon to expand until it disintegrates to a degree. At this time, [url=http://www.agentparadise.com]woolrich sito ufficiale[/url] above this altitude sounding rockets are used. After sounding rockets, they use satellites for higher altitudes. Weather balloons are sighted as an unidentified flying object and also used for cluster ballooning.
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