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<br />pyrotechnic flare attached to the aircraft wing will burn for about 5 <br />minutes with an output of 75 grams of AgI; an ejectable flare will burn <br />for about 30 seconds and emit 5 to 20 grams of AgI. When dry ice is used, <br />the dispensing rate is measured in ki1ogrrons per hour from the airpl?ne <br />during its traverse of fog or clouds. <br /> <br />Summary of Reported Data for CY 1979 <br /> <br />Table 6 presents a summary of data repoI'ted in CY 1979 and covers the <br />number of modification days, hours of operation, and amounts of the various <br />seeding agents. Of interest are the small number of nonfedera1 research <br />days and the lack of Federal hail suppression activities. Tables 3, 4 and <br />5 provide additional data on the reported activities. <br /> <br />Table 6.--Summary (if reported data for CY 1979 <br /> <br /> pedera1 Nonfederal Total <br /> (a) Modification days 147 1, 091 1,238 <br /> (cumulative) <br /> (b) Modification days 113 974 1,087 <br /> (increase precipi- <br /> tation) <br /> (c) Modification days 0 133 133 <br /> (hail suppression) <br /> (d) Modification days 34 56 90 <br /> (fog dispersal) <br /> (e) Modification days 54 22 76 <br /> (research) <br /> (f) Airborne apparatus 355 2,043 2,398 <br />~ operation (hours) <br />I' (g) Ground-based apparatus 984 14,621 15,605 <br /> operation (hours) <br />" <br /> (h) Dry Ice (kg) 1,530 15,933 17,463 <br /> (i) Silver iodide, dispensed 224 678 902 <br /> (kg) <br /> (j) Liquid propane (gal) 11,077 0 11,077 <br /> (k) Polyelectrolyte (kg) 0 641 641 <br />,. <br />.~~ <br /> 9 <br />