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Platform: EXPLORER 9 > Air Density Balloon
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Synonymous Platform Names:
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Platform-based Instruments:
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Orbit Inclination: 38.91degrees
Perigee: 545 km
Apogee: 2225 km
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Explorer 9 was the first in a series of 3.66-m inflatable spheres placed into orbit solely for the determination of atmospheric densities. The spacecraft consisted of alternating layers of aluminum ... View entire text
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Launch Date: 1961-02-16
Launch Site: Wallops Flight Facility, Wallops Island, USA
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