Accession Number : AD0637314
Title : AIR-EARTH CURRENTS MEASURED WITH RADIOSONDERS.
Descriptive Note : Final rept.
Corporate Author : LITTON SYSTEMS INC MINNEAPOLIS MINN APPLIED SCIENCE DIV
Personal Author(s) : Ruhnke,Lothar H.
Report Date : 15 JUN 1966
Pagination or Media Count : 27
Abstract : Measurements of air-earth current density were made over a period of six months over Minnesota. Instrumentation consisted of balloon-borne radiosonde-electrometer packages with long wire antennas. The balloons were set to float at about 21 km altitude and were tracked until the signal faded out. The average current density of all 30 flights independent of local time was found to be 1.2 x 10 to the -12th power A/sq. m. The standard deviations of the fluctuations in the current density were computed. In general, the deviation was about 50 from ground level up to the end of the exchange layer, about 5 up to the tropopause, and about 1 above that. This shows that local disturbances do not allow measurements of total current density free of local influences below the tropopause and that measurements in the stratosphere can be used to study global current flows. (Author)
Descriptors : (*ATMOSPHERIC ELECTRICITY, MEASUREMENT), (*ELECTRON DENSITY, MEASUREMENT), RADIOSONDES, METEOROLOGICAL BALLOONS, STRATOSPHERE, TROPOPAUSE, THUNDERSTORMS, WEATHER FORECASTING
Subject Categories : Meteorology
Distribution Statement : APPROVED FOR PUBLIC RELEASE