The July 22, 1977 newsletter written by Henry Lansford explains that the summer's field work had been limited to continuing the National Hail Research Experiment study relating hailfall characteristics to crop damage and developing an aircraft positioning system to locate research aircraft relati... Show moreThe July 22, 1977 newsletter written by Henry Lansford explains that the summer's field work had been limited to continuing the National Hail Research Experiment study relating hailfall characteristics to crop damage and developing an aircraft positioning system to locate research aircraft relative to the storm they are studying. Radar, aircraft, precipitation measurement network, and other aspects of the previous field work operations had not been used. Instead, the program was focused on analysis and interpretation of data collected from previous field research seasons. So far, analysis suggested that the 1972-74 cloud seeding techniques had not had a significant effect on hailfall or rainfall. The program would be broadened to include research of thunderstorms which produce hailstorms, and no future cloud seeding experiments are planned. Show less
