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<br />mountain precipitation could be expected will not be seeded <br />at all. <br /> <br />The specific aircraft that will be utilized has not been <br />selected as yet but it will be a high performance pressurized <br />twin engine aircraft, such as a turbo prop Aerocommander or <br />a Piper Cheyenne. The aircraft will be certified to fly into <br />known icing conditions and will be equipped with a seeding <br />generator that will burn a silver iodide - acetone based solution. <br />In addition to being fully instrumented for IFR conditions <br />the aircraft will be equipped with the NCAR ice nucleus counter, <br />both a JW and King liquid water sensor and a PMS 2-D cloud <br />probe. <br /> <br />On some occasions a single engine aircraft will be used <br />to drop dry ice into the cloud deck from above. The dry ice <br />will be manually released along a line perpendicular to the <br />mean wind direction. The turbo prop cloud physics aircraft <br />will then monitor microphysical changes in the cloud due to <br />the seeding. <br /> <br />Ground based seeding will generally utilize a Desert <br />Research Institute (DRI) AgI-acetone based generator, which <br />will be remotely operated via radio controlled commands, and <br />two or three Skyfire manually operated generators. The DRI <br />generator will be located upwind of the target probably at <br />about the 9500 ft. elevation (MSL) although the exact site <br />has not been selected. The Skyfire generators will also be <br />upwind of the target but will be mobile and operated at various <br />elevations from 8000 ft. (MSL) to the top of the Grand Mesa. <br /> <br />This seeding activity is designed to be exploratory in <br />nature and the intent is to concentrate on as simple a steady <br /> <br />3 <br />