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<br />.... . ~ ~ <br />c <br /> <br />DESCRIPTION OF THE PROJECT II1PLEMENTATION AND CONDUCT <br /> <br />1. Office Location <br /> <br />Operation Control Center & Weather Forecast Office <br />Department of Atmospheric Science <br />Colorado State University <br />Fort Collins, Colorado 80523 <br />(303) 491-8675 <br /> <br />2. Weather Data Avail~ble <br /> <br />The operational forecasts for this experiment will be made at CSU <br /> <br />utilizing the synoptic charts received via faxcimily machine as well as <br /> <br />sounding surface observation, and gridded NWS model outputs from the <br /> <br />Bureau of Reclamation's Environmental Data System. <br /> <br />3. Description of Seeding Devices, Materials and Seeding Rates, etc. <br /> <br />The seeding will be accomplished using two LW83 (285g of AgI) flares <br /> <br />(supplied by NWC, China Lake, California). The seeding rates will be 5,700 <br /> <br />g/hr for 6 minutes (total of 570g released) for the flares. An effective- <br /> <br />ness curve is enclosed. <br /> <br />4. Operations <br /> <br />Upon the short range forecast of an ice-saturated layer between <br /> <br />20,000 and 30,000 feet msl in a clear sky an alert will be called. Regular <br /> <br />radiosonde data as well as the Craig radiosonde data will be used to verify <br /> <br />the occurance of the proper moisture conditions. The seeding-observing <br /> <br />aircraft will operate out of the Colorado Springs Municipal Airport. The <br /> <br />operating procedure will be to climb to the ice saturated layer and cruise <br /> <br />until an ice contrail is produced from the engine exhaust. When the pilot <br /> <br />observes a growing trail of ice crystals being produced he will attempt to <br /> <br />o~ <br />seed a circle of approximately three miles in diameter with ~ AgI glare. <br /> <br />The contrail thus produced will be observed as it drifts east and dissipates <br /> <br />as long as it is practical. <br />