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Unusual Chemical Compositions of Noctilucent-Cloud Particle Nuclei
Published online by Cambridge University Press: 12 April 2016
Abstract
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On August 8, 1970, two Pandora sounding rocket payloads were launched from the ESRO range in Kiruna, Sweden during a noctilucent cloud display. Large numbers of sub-micron particles were collected, most of which appear to be made up of a high-density material coated with a low-density material. Typical electron micrographs are shown. Particle chemical compositions have been measured by use of dispersive x-ray analysis equipment attached to a Philips EM 300 electron microscope and have revealed that most of the high-density particle nuclei have atomic weights greater than iron.
- Type
- Research Article
- Information
- International Astronomical Union Colloquium , Volume 13: Evolutionary and Physical Properties of Meteoroids , June 1971 , pp. 287 - 290
- Copyright
- Copyright © NASA 1971
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