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An observation balloon is a type of balloon that is employed as an aerial platform for gathering intelligence and spotting artillery. The use of observation balloons began during the French Revolutionary Wars , reaching their zenith during World War I , and they continue in limited use today.
A weather balloon, also known as a sounding balloon, is a balloon (specifically a type of high-altitude balloon) that carries instruments to the stratosphere to send back information on atmospheric pressure, temperature, humidity and wind speed by means of a small, expendable measuring device called a radiosonde.
Earth observation (EO) is the gathering of information about the physical, chemical, and biological systems of the planet Earth. [1] It can be performed via remote-sensing technologies (Earth observation satellites) or through direct-contact sensors in ground-based or airborne platforms (such as weather stations and weather balloons, for example).
Also amphidrome and tidal node. A geographical location where there is little or no tide, i.e. where the tidal amplitude is zero or nearly zero because the height of sea level does not change appreciably over time (meaning there is no high tide or low tide), and around which a tidal crest circulates once per tidal period (approximately every 12 hours). Tidal amplitude increases, though not ...
German observation balloon launching at Équancourt in the Somme (22 September 1916) German war plane brings down a tethered kite balloon (1918) World War I was the high point for the military use of observation balloons, which were extensively deployed by both sides. The British, despite their experience in late 1800s Africa, were behind ...
The sensor, which is the radiosonde instrument, is powered by a small battery and attached to the balloon; this is what measures the pressure, temperature and relative humidity as it ascends up ...
The balloon flying over the U.S. is flying around 60,000 feet over the center of the country, officials said. An observation balloon at Van Cortland Park in New York City during a field artillery ...
The term is typically used to distinguish an upper-air observation from a surface weather observation, as in "winds aloft". [2] altimeter A scientific instrument used to measure the altitude of an object (e.g. a weather balloon) with respect to a fixed level such as sea level. [1] altocumulus castellanus altocumulus (Ac)