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<br />!" <br /> <br />Phases <br />& Times <br /> <br />t <br /> <br />Phase 1 <br />Exploratory <br />Studies <br /> <br />t <br /> <br />Phase 2 <br />Single-Cloud <br />Rain Modification <br />Experiment <br /> <br />1 <br /> <br /> <br />Phase 3 <br />Area rain <br />Modification <br />Experiment <br /> <br />Phase 4 <br /> <br />Atmospheric <br /> <br />Establish <br />. rain characteristics <br />. cloud characteristics <br />. seeding technologies <br />. measurement techniques <br />. reasonable hypotheses <br /> <br />Phase 2 <br />Modification Hypotheses <br />Formulated <br /> <br />Pre-PaCE: <br />. test of hypotheses <br />· field test of seeding <br />techniques <br />. develop physical/ <br />statistical design <br /> <br />Sharpen hypotheses and <br />select for experiment <br /> <br />Proof of Concept Experiment: <br />Semi-isolated Clouds <br />. monitor physical changes <br />in clouds <br />. monitor precipitation <br />· continious evaluation - <br />physical/statistical <br />. conclude when design <br />criteria are met <br /> <br />Phase ~~ <br />Hypothesis De~ <br /> <br />Develop Physical/statistical <br />design <br />launch experiments <br />Perform continuous evaluation <br />Re-define initial hypothesis <br />Conclude when design criteria <br />achieved <br /> <br />Socio-Econolmic <br />& Environmental <br /> <br />Delineate <br />· political attitudes <br />· economic models; <br />· legal requirements <br />· downwind impact <br />· ecological impacts <br />· undesirable atmospheric <br />impacts <br /> <br />Monitor Impac~ <br /> <br /> <br />and <br /> <br />Evaluate ~ <br /> <br />Monitor Impac~ <br /> <br />and <br /> <br />Evaluate Benefits ~ <br />Disbenefits -.-J <br /> <br />Transfer of Technc)logy <br />to High Plains States <br />and Other UselrS <br /> <br />Figure 2.3-HIPLEX-ISWS comprehensive experiment design. <br /> <br />7 <br />