Electrical structure of large overwater shower clouds

Three instrumented aircraft were used to study the development and separation of charge in large clouds. Basic cloud physics data regarding liquid water content, icing rate, temperature, precipitation forms, cloud photography, airborne radar cross sections, and three components of electric field were obtained from a C-130 aircraft. Two electric field components, temperatures, photography, and draft structure were obtained from an F-100F aircraft. A U-2 aircraft provided field data above the storms.