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<br />-::=7 c'l <br /> <br />---- <br /> <br />environmental measurements and photographic records of the cloud <br /> <br />systems. It will not release any seeding materials. <br /> <br />c. Twin engine aircraft will be used to burn silver iodide <br /> <br />flares on selected days, Host releases will be under conditions of <br /> <br />minimal cloud cover. <br />, <br /> <br />5. Seeding Devices and Rates <br /> <br />Ground-based seeding will be conducted from one of the two <br /> <br />locations shown on the project map (Attachment II). Standard <br /> <br />"Skyfire" type generators will be used to burn Z% silver iodide - <br /> <br />Ammonium Iodate solution in acetone. The solution will burn in a <br /> <br />propane flame at rates which are adjustable from .10 gal/hour to <br /> <br />.5 gal/hour. At these flow rates, 7 grams to 36 grams of silver <br /> <br />iodide can be vaporized into ice nuclei for each hour of operation. <br /> <br />The ice nuclei yield effective at _zooe is approximately 1015 active <br />-~ ~-~- ----~ --- <br /> <br />nuclei per gram. On most operational days, CSU will burn simultane- <br /> <br />ously ~lndium Nitra~solution in ethyl alcohol, The product of <br /> <br />this combustion is Indium oxide, InZ03, a non-nucleating trace~ <br /> <br />material. No weather modification effects can be expected from tracers. <br /> <br />Aircraft seeding will be accomplished dropping end-burning pyro- <br /> <br />technic flares. The flares will apply ice nuclei at a rate of approxi- <br /> <br />mately 185 grams per hour.' The flares will be dropped in various <br />- <br /> <br />patterns for transport and dispersion studies of aircraft released <br /> <br />seeding materials. <br /> <br />6. Operational Period and Seed Times <br /> <br />The research period will extend from November 15 until December <br /> <br />31, 1979. Should there be substantial below normal cloud conditions <br /> <br />during the p~riod, portions of the research will be extended into <br /> <br />January 1980. It is anticipated that [15-Z0 da~ suitable for the <br />