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<br />SEEDING METHODS <br /> <br />Cloud seeding aircraft fly in inflow or updraft areas of <br />the clouds while dispensing the seeding material. The <br />flight altitudes vary from 4,000 to 15,000 feet above the <br />ground. <br /> <br />~ <br /> <br /> <br /> <br />l.." ...a..... <br />~ ..... <br /> <br />+ <br /> <br /> <br />~- <br /> <br />Silver iodidE~ crystals are <br />placed in the cloud updraft <br />by flying through the top <br />of the cloud and dropping <br />a flare vertically through <br />the cloud. ']~his type of <br />flare produces only about <br />10 grams, or 1/45 of one <br />pound, of silver iodide. <br /> <br />~-- <br /> <br />------ <br />-- <br /> <br />Larger clouds are seeded <br />by strategically placing <br />the silver iodide in air <br />inflow areas at cloud <br />base. <br /> <br />As much as two pounds of <br />silver iodide may be used <br />to treat a large thunder- <br />storm for hail suppression. <br /> <br />Aircraft average about 27% of their flying time actually <br />dispersing the seeding material. The total silver iodide <br />accumulation over a season has been 1/45 pound per section <br />of land. <br /> <br /> <br />~~ <br />~~~ <br /> <br />19 <br />