Dieses Bild kann kleinere Mängel aufweisen, da es sich um ein historisches Bild oder ein Reportagebild handel
Signal Corps meteorological student Greening launching a weather balloon. College Station, Texas A&M 1918. The Signal Corps is a branch of the army responsible for military communications, meteorological studies, and related work. A weather ballon is a balloon used to carry instruments aloft to gather meteorological data in the atmosphere. Weather balloons are tracked by radar, Global Positioning System, or theodolites. The balloon itself usually contains devices to measure temperature, pressure and humidity, although it can contain specialized devices to measure the ozone in the ozone layer. Filled with hydrogen or helium gas, weather balloons can reach 22 miles (35 km) in altitude before disintegrating due to the decreased pressure of the lower stratosphere.
