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<br />I. Case Termination <br /> <br />Measurements will be terminated on each experimental unit 40 minutes <br />after treatment or when the cloud dissipates, whichever occurs <br />first. <br /> <br />J. Final Test Statistics <br /> <br />The response variables TIPA, TIPR, AER, RERA, and RERC will be used <br />to generate the final test statistics that are directly relevant to <br />the null hypotheses. For reasons previously noted, testing of the <br />null hypotheses for primary response variables determined from the <br />SWR-75 radar (TIPR, RERA, and RERC) will be limited to those experi- <br />mental units for which tlhe center of the lowest tilt radar beam was <br />at or below (warmer than) the +10 oC level. <br /> <br />1. The ~roportion of seeded and un seeded experimental units that <br />precipitate will be based on the time to initial precipitation. <br />If that time is less than 40 minutes, the cloud will be considered <br />as having precipitated: <br /> <br />a. PCPA(S) and PCPA(NS) will be based on TIPA, the aircraft- <br />determined value of the time to initial precipitation. <br /> <br />b. PCPR(S) and PCPR(NS) will be based on the radar-determined <br />TI PR . <br /> <br /> 2. The average volume! of rain per seeded and un seeded experimental <br /> unit will be determined independently from the aircraft- and the <br /> radar-estimated rainfall values: <br /> a. AVRA(S) and AVRA(NS) will be based on AER. <br /> b. AVRC(S) and AVRC(NS) will be based on RERC. <br /> c. AVRR(S) and AVRR(NS) wi 11 be based on RERA. <br />K. Secondary Respons~ V~riables <br /> <br />The following eight additional variables (secondary response variables) <br />are identified as likely to distinguish seeded from un seeded clouds <br />but are not considered essential in validating the physical hypotheses: <br /> <br />23 <br />