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<br />FOD: AARRP Field Operations Director. <br /> <br />GMS: geostationary meteorological satellite. <br /> <br />GMT: Greenwich mean time. <br /> <br />GPCM: Great Plains Cumulus Model. <br /> <br />GPS: global positioning system. <br /> <br />Glaciogenic seeding: seeding of a cloud with ice-forming chemicals to bring about the <br />conversion of its supercooled water to ice. <br /> <br />IAS: indicated airspeed. <br /> <br />IRIS: Interactive Radar Information System. <br /> <br />"Metwatch": Frequent visual observations of cloud conditions over the AARRP study area, <br />especially the development of convective clouds. <br /> <br />MCM: millions of cubic meters. <br /> <br />MLR: multiple linear regression. <br /> <br />MNR: maximum natural rainfall. <br /> <br />MOAC: Ministry of Agriculture and Cooperatives. <br /> <br />MRPP: multi-response permutation procedure. <br /> <br />m.s.l.: mean sea level. <br /> <br />NASA: National Aeronautics and Space Administration. <br /> <br />N on-operational day: a non-operational day is declared by the Field Operations Director whl3n <br />it is desired to give all AARRP personnel time off; generally, the declaration will be made the <br />previous day. <br /> <br />"Nowcasting": a close meteorological surveillance of the project area to determine the weather <br />conditions that already exist and those that are expected to exist in the next 2 hours. <br /> <br />Operational-go day: an operational-go day is declared by the Field Operations Director when <br />convective cloud systems that are likely to be suitable for warm and/or cold cloud seeding <br />exist in the study area, indicating that randomized cloud seeding experiments should <br />commence as soon as possible. <br /> <br />Operational-standby day: an operational-standby day is declared by the Field Operations <br />Director when conditions suitable for randomized seeding experiments do not exist in the <br />study area now, but are expected to develop within the next 2 to 6 hours. <br /> <br />IV <br />