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<br />II <br />II <br />II <br />II <br />II <br />II <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 />There were 23 missions flown during the Experi- <br />mental Period; five were with placebos, nine with AgI flares, and <br />nine recon flights. Table IV provides a complete summary of all <br />missions flown. <br /> <br />3.4 Case study Days <br />In order to facilitate the evaluation of the seeding <br />events during the Experimental Period it was necessary to classify <br />all days when seeding took place in the 12-2200 time frame. Each <br />Experimental Period day, when flares were fired, was classified <br />as a "Case study", of which there were twelve (some days ha.d <br />multiple flights). These cases were then further reduced to two <br />categories; sand (placebo) and live AgI flare cases. <br />In accordance with the rules of the randomization <br />scheme four of the twelve original cases were disqualified from <br />the statistical analysis for several reasons (10 were retained for <br />the Case study Analysis). Summaries of "qualified" and "diB- <br />qualified" seeding cases are listed in Tables V and VI. The two <br />reasons for disqualifying the four cases are given in Table VI <br />and relate to either a low number of flares expended or seeding <br />during the Operational Period which might contaminate clouds <br />observed in the following Experimental Period. <br /> <br />3.5 Suspension of Seeding Operations <br />On several occasions the steering Committee <br />ordered a suspension of seeding operations over selected arE!aS <br />of the state for both the Experimental and Operational Periods. <br />During two separate periods, operations were shut down over the <br />entire target area; once in early July and again in mid-August. <br />Limited operations were permitted during most of the August and <br />during early September. The following is a list of partial and <br />complete shut-down periods: <br /> <br />27 <br /> <br />" <br />