The development of the jet engine techniques for estimating the condensed water content in clouds took place during the Project for Atmospheric Water Supply, funded by the Water Research Commission, Pretoria, South Africa, as part of field operations conducted by Simpson Weather Associates of Charlottesville, Virginia, and the CloudQuest company of Nelspruit, South Africa. The instrumented Learjet aircraft was operated in measurement campaigns of the Italo–Slovenian Hail Prevention Project by CloudQuest with the permission of WRC and with the collaboration of the Meteorological Services and the Civil and Military aviation authorities in Italy, Austria, France, and Croatia. The Italo–Slovenian Hail Prevention Project was funded under the Osimo Agreements, drawn up between Italy and ex-Yugoslavia. The authors are grateful to Mr. Ron Gould of the General Electric Corporation, Lynn, Massachusetts, for discussion concerning the evaporation of condensed water in the jet engine.
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