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<br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br /> <br />of the seeding period to the corresponding precipitation period <br />should, in general, give a slightly more conservative estimate of <br />the program seeding results because the number of hours of seeding <br />are diluted by two additional hours of precipitation. An exception <br />to this being if the generator network is turned on or off within <br />30 minutes before the hour, i:hen the next hour later would be <br />utilized as the beginning and end of the operating period for the <br />evaluation of precipitation. An example of this situation would <br />be for a seeding period from 0845 hours until 1915 hours. The <br />comparative precipitation period would be 1000 hours to 2300 hours. <br />The reason for this time delay in the association of seeding <br />results with first-observed precipitation at the ground is that <br />it takes more than 30 minutes for the silver iodide crystals to <br />travel from the generator up to the cloud system, grow and fall <br />out as precipitation. <br />Very detailed and accurate logs of the operations of each <br />generator utilized during each seeding operation should be included <br />in the operations reports for each event. Also included would be <br />information indicating any equipment problems, malfunctions and <br />operational discrepancies. ;~lso, accurate records should be <br />maintained on the actual consumption of seeding material for each <br />site and for the total program compared to the calculated and <br />indicated amounts reported from office records and field observa- <br />tions. This data can confirm or correct laboratory tests of the <br />generators' seeding capabili"ties to produce the desired seeding <br />rates. <br /> <br />3. Meteorological Instrumentation and Monitoring Procedures <br />The proposed program includes the requirement for the in- <br />stallation and operation of !meteorological instrumentation that <br />will provide the data necessary for the program evaluation phase. <br />It should be remembered that this is a Demonstration-Type Research <br />Program (2/3 seed and 1/3 non-seed) and not a pure research <br />program, which would have more extensive observing and monitoring <br />requirements. However, because of the randomization scheme <br />proposed for this program, interested individuals or groups <br /> <br />-35- <br />