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<br />PART I: SUMMARY OF WEATHER MODIFICATION <br />ACTIVITIES FOR CALENDAR YEARS 1976, 1977, and 1978 <br /> <br />-i <br />I <br /> <br />Data Base <br /> <br />Initial, Interim, and Final Reports submitted to NOAA provide the data <br />base for this summary of weather modification activities. Each activity <br />is assigned a NOAA file number upon receipt of an lnitia1 report from a <br />project official; appendix D lists 244 reports analyzed herein for ac- <br />tivities in CY 1976, 1977, and 1978. The records and other information <br />obtained under the reporting procedures are available for inspection at <br />NOAA on written request. <br /> <br />All reports are reviewed and requests are sent to the operators when <br />the data are incomplete; replies to these infrequent requests for addi.- <br />tional information are usually prompt. Experience with the reporting <br />program shows that the information most often requiring a fo110wup re- <br />quest concerns sponsor and operator identification, target area maps, <br />aircraft and equipment used, dispersal rates of modification agents, <br />date on which final weather modification activity occurred, and signature. <br /> <br />.1 <br />I <br />I <br /> <br />NOAA maintains surveillance of activities through news-clipping ser- <br />vices, National Weather Service Offices, and technical publications, <br />scientific conferences, and personal contacts with the weather modifi- <br />cation community to ensure that weather modification activities are <br />properly reported. There is no evidence that any attempts to modify <br />weather by scientifically accepted techniques have not been reported. <br /> <br />Summary of Dl;lta <br /> <br />The reported information for calendar years 1976, 1977, arid 1978 has <br />been arranged in several categories for convenience in analyzing the <br />data. These categories are discussed in the following sections. <br /> <br />Number of Activities <br /> <br />,I <br /> <br />Inspection of the 193 reports of weather modification activity listed <br />in appendix D shows that the following pairs of projects were carried <br />out at the same locations in the specified years: <br /> <br />4 <br />