Computer Science – Sound
Scientific paper
Jun 1989
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989esasp.291...79w&link_type=abstract
In ESA, European Rocket and Balloon Programs and Related Research p 79-84 (SEE N90-13826 05-42)
Computer Science
Sound
Atmospheric Sounding, Current Distribution, D Region, Electron Energy, Electrostatic Probes, Mobility, Direct Current, Electric Fields, Middle Atmosphere, Seasons, Spaceborne Experiments
Scientific paper
The conversion of the currents measured by rocketborne direct current (dc) probes, in the middle atmosphere, is studied. It is shown that the conversion factors derived for positive ion currents are much more stable than those obtained for electron current. This problem is investigated using results obtained by dc probes which had a well confined collection geometry and were flown at 37 degrees north during autumn, winter, spring and summer. It is shown that the probes work as mobility probes and that the electron current is controlled by the mass of the positive ions and the temperature of the electrons which are at thermal equilibrium at heights below about 90 km at middle latitudes. It is found that, due to a peculiarity in the design, these probes responded to vertical electric fields too.
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