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space equivalent zone. In DICTIOUS you will not only get to know all the dictionary meanings for the word
space equivalent zone, but we will also tell you about its etymology, its characteristics and you will know how to say
space equivalent zone in singular and plural. Everything you need to know about the word
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English
Noun
space equivalent zone (uncountable)
- (aviation) The top of the Earth's atmosphere, from 50,000 ft (the start of the stratosphere) and up (to the edge of the exosphere at 1000 mi); where the effects of exposure to the environment on human life is similar to that of exposure to space; it being physiologically incompatible with human life.
Usage notes
Both the Armstrong line (63,000ft) and the Karman line (100km) lie within this zone, as does low Earth orbit (LEO) as LEO still encounters wisps of atmosphere.
Coordinate terms