Detection of artificially created negative ion clouds with incoherent scatter radar

Details Detection of artificially created negative ion clouds with incoherent scatter radar Detection of artificially created negative ion clouds with incoherent scatter radar

Apr 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992jgr....97.4085s&link_type=abstract

Journal of Geophysical Research (ISSN 0148-0227), vol. 97, no. A4, April 1, 1992, p. 4085-4097.

Physics

4

Chemical Clouds, F Region, Incoherent Scatter Radar, Ionospheric Ion Density, Chemical Release Modules, Negative Ions

Scientific paper

The physical mechanisms by which negative ions change the shape of the incoherent scatter spectrum, and the way in which shape changes may be used to detect the presence of heavy positive and negative ions in an ambient ionosphere are investigated. In order to detect heavy negative ions, the temperature structure of the ionosphere is fixed to a prevent average measurement, and any changes in spectral shape during the experiment are interpreted as being caused by changes in composition, and not by changes in the temperature ratio Te/Ti. The spatial and temporal development of heavy negative ion plasma clouds created during four active chemical release experiments was observed. Concentrations of 10-40-percent SF6(-) were detected in SPINEX 1, SPINEX 2, and IMS data sets. An average uncertainty of +/-10-percent SF6(-) is present in all three experiments. Concentrations of 30-percent Br(-) were detected in the NICARE 1 release, with uncertainties of +/-4 percent.

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