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<br />PHASES <br /> <br />Phase 1 <br />Exploratory (Background) <br />Studies <br /> <br />Ph", J <br /> <br /> <br />Single-Cloud <br />Rain Modification <br />Experiment <br /> <br />I <br /> <br />Phase 3 <br />Area Rain <br />Modification <br />Experiment <br /> <br />Phase 4 <br />Tec"nology <br />Transfer <br /> <br />COMPGrIEtnS OF HIPLEX - RAINFALL ENHANCEMENT <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-experiment Studies <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 />Randomized Exploratory Ex- <br />periments <br />Semi-isolated Clouds <br />monitor physical changes <br />in clouds <br />monitor precipitation <br />continuous evaluation - <br />physical/statistical <br />conclude when design <br />criteria are met <br /> <br />Phase 3 <br />nypothesis Developed <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 />SOC IOECONOMIC <br />& ENV I RONt~ENTAL <br /> <br />Delineate <br />political attitudes <br />economic & ,crop-yipld <br />models <br />legal requirements <br />downwind impact <br />ecological impacts <br />undesirable atmospheric <br />impacts <br /> <br /> <br />and <br /> <br /> <br /> <br />and <br /> <br />e <br /> <br /> <br />Transfer of Tech- <br />nology to High <br />Plains states and <br />Other Users <br /> <br />Figure 1. - Flow of experimental effort in HIPLEX. <br /> <br />4 <br />