ed the operational phase of Project 6.6 in an owtstanding manner, de- epitenumerous wnforeseen difficulties. The enlisted men of Mobile Section A (including the alternates who served) performed their duties excellently, usually doing more than was required, so as to insure the success of th. project. Personnel of the National Bureau of Standards ionosphere station «a Guam and Signal Corps personnel of the 9465th Technical Service Unit at the ionosphere station on Okinawa, who cooperated so> fully in the special operation of their stations. Central Radio Propagation Laboratory of tha National Bureau of Standards, which provided one of the ionosphere recorders used and loaned the film from waich Guam ard Maw. Lonograms reproduced herein were obtained. Signal Corps Radio Propagation Agency, which provided the services of Mobiie Section A, 9471st Technical Unit, and loaned the film from which Okinawa ionograms reproduced herein were cbtained. 0 SC TRERTNTRET NEVE Corporal Robert E. Nowell, of the 947lst Technical Unit, who aided immeasurably in analyzing the data and in writing parts of the. first draft of this final report, Personnel of the Photographic Section, Reproduction Branch, Signal Corps Engineering Laboratories, who were exceedingly cooperative in the preparation of the figures used in this report. atEsoC POR re aa ROR cee Technical Unit, Project Officer (Operations), who planned and execut~ OL pe CER, AS ean GOL SUMARIO Dae Seaetal eeamae eh The assistance and cooperation of the following individuals and organizaticns is hereby gratefully acknowledged: Captain Albert Giroux, Signal Corps, CO Mobile Section A, 947lst gh eee Br Ais Ee Nee Nt et Bee he Isoe caer Lo rake AA he me See La aePAE ne s ACKNOWLEDGEMENTS 9-10 SECRET