Radiosonde Systems for the Study of Warm Cloud Development.
HAWAII UNIV HONOLULU DEPT OF METEOROLOGY
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The design criteria, construction details and electrical circuits of three radiosonde instrument systems are presented. The electrical potential gradient radiosonde EPGR measures the atmospheric potential gradient 0 to plus or minus 1500 Vm in and around warm clouds. The raindrop charge radiosonde RCR measures the in-cloud raindrop charge minimum charge detectable 10 to the minus 5th power e.s.u.. The raindrop charge-size radiosonde RCSR measures the in-cloud raindrop size minimum size detectable 0.6 mm, as well as the charge. Through the use of a novel switching circuit, the radiosonde systems also transmit the ambient temperature, pressure and relative humidity to the ground. Examples of the data derived from radiosonde soundings are presented. Author