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Upper air density derived from the orbits of Discoverer satellites and its variation with latitude |
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| Authors: | B R May |
| Institution: | Radio Research Station, Ditton Park, Slough, Bucks, UK |
| Abstract: | Observations on artificial satellites have been used to investigate how the air density at heights between 190 and 260 km varies with latitude The Discoverer series of satellites was used because the position of their perigees moved over the latitude range from 80°S to 80°N. It is concluded that the air density at a fixed height is a function of latitude and is about 30 per cent smaller at the poles than at the equator. This result is applicable to a local time of 14h in the years 1959–1960: it is different from that obtained by Groves who concluded that the density is independent of latitude. |
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