Summary
With a self-neutralizing, rocket-borne parachute aspiration probe concentration and mobility measurements of positively and negatively charged carriers were made between 72 and 40 km over Sardinia. Between 72 km and 60 km a ‘heavy’ and a ‘light’ group of positively charged particles were found. The ‘heavy’ group was more abundant than the ‘hight’ group in the greater heights. For the negatively charged particles only one mobility group was found which roughly corresponded to the mobility of the ‘light’ group of the positively charged carriers. The probe was designed so that no electrons could enter the analyzer section of the aspiration system. By this the electron concentration was given by the difference in concentration between the positively and negatively charged particles.
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References
G. Rose undH. U. Widdel,Ein Messgerät zur Bestimmung der Strömungsgeschwindigkeit in kurzen Rohren (Ionenzählern) bei niedrigem Gasdruck [a device for measuring the airflow in short tubes (ion counters) at low pressure], Mitteilungen aus dem Max-Planck-Institut für Aeronomie, Nr. 30 (Springer Berlin, Heidelberg-New York 1967).
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This paper was read byH. Dolezalek, in an abbreviated form supplied by the authors.
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Widdel, H.U., Rose, G. & Borchers, R. Results of concentration and mobility measurements of positively and negatively charged particles taken by a rocket-borne parachuted aspiration (Gerdien) probe in the height region from 72 to 39 km. PAGEOPH 84, 154–160 (1971). https://doi.org/10.1007/BF00875466
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DOI: https://doi.org/10.1007/BF00875466