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<br />OPERATIONAL PLAN <br />1. General <br />One of the licensees, previously named (L. Davis, R. Papania, L. <br /> <br />Grant), will direct each day's operation. Routine weather forecasts <br /> <br />will be obtained from CSU, Fort Collins, containing the basic information <br /> <br />for the selection of the research days. <br /> <br />The basic plan is to conduct the research operation on clear-sky <br /> <br />days when there exists a moist layer, between 20,000 and 30,000 feet msl <br /> <br />which is supersaturated with respect to ice but subsaturated with respect <br /> <br />to water. The flight criteria will be based on ffivC forecasts and on <br /> <br />atmospheric sounding data. <br /> <br />2. Statement of the Nature and Objectives of Proposed Research <br /> <br />The nature of the proposed research is to study the development and <br /> <br />persistence of ice particle contrail created by the seeding which will be <br /> <br /> <br />similar to that produced by small jet aircraft. The primary target area <br /> <br /> <br />will be the north central section of Colorado. <br /> <br />3. Map of Proposed Operating Area <br /> <br />The accompanying map shows the approximate area over which the seeding <br /> <br />material will be released. It is expected that the ice crystals thus <br /> <br />produced will persist for an appreciable length (1-2 hrs.) of time and be <br /> <br />moved downwind with the general flow. <br /> <br />4. Observational Instrumentation <br /> <br />On board the Schweizer aircraft will be a camera for visual observations <br /> <br />an ice crystal counter, and a temperature probe for direct measurements. <br />