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Explorer II was a crewed U.S. high-altitude balloon that was launched on November 11, 1935, and reached a record altitude of 22,066 m (72,395 ft). Launched at 8:00 am from the Stratobowl in South Dakota, the helium balloon carried a two-man crew consisting of U. S. Army Air Corps Captains Albert W. Stevens and Orvil A. Anderson inside a sealed, spherical cabin.
Urban Sky Remote Sensing balloons operate in the stratosphere at an altitude of about 20km (about 65,000 feet), and are roughly the size of a car at launch with a payload attached underneath. [18] [19] The balloons grow in volume as they ascend and are roughly 11 times larger in the stratosphere than when they are near the ground. [20]
In 1934 the NGS and Air Corps co-sponsored the Explorer, a manned high-altitude balloon capable of stratospheric flight. After the crash of the Soviet Osoaviakhim-1 that nevertheless set an altitude record of 72,178 feet (22,000 m), the sponsors redefined their primary objectives from record-setting to scientific research and tests of new navigation instruments. [1]
Floating up to the stratosphere, the region between four and 31 miles above the Earth’s surface, it was able to capture high resolution photos of the Alexander Mountain fire, near Fort Collins ...
The Explorer human spaceflight experience (so called by World View, even though the flight would not reach space by any standards) is under development with the goal of carrying private individuals to approximately 100,000 ft (30.48 km) above Earth inside a pressurized capsule lofted by a helium-filled high-altitude balloon.
The balloon will be launched into the upper stratosphere, where it will pop and release its gas. That gas will ever-so-slightly reflect back the sun’s rays, infinitesimally cooling the Earth.
Geostationary balloon satellites (GBS) are proposed high-altitude balloons that would float in the mid-stratosphere (60,000 to 70,000 feet (18 to 21 km) above sea level) at a fixed point over the Earth's surface and thereby act as an atmospheric satellite. At those altitudes, air density is around 1/15 to 1/20 [37] of what it is at sea level ...
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