What approximate altitude in kilometers corresponds to the 50-mile standard recognized by NASA and the USAF?
Answer
80 km
The operational standard used by the United States Air Force and NASA for qualifying personnel for astronaut wings is set at 50 miles above sea level. When converting this measurement using standard conversion factors, 50 miles translates to approximately 80 kilometers. This metric is distinct from the internationally accepted Kármán line of 100 kilometers, illustrating a divergence between theoretical demarcation and national operational definitions for defining the entry into space for personnel qualification.
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