This report covers the activities for the research and development of communications performed between a ship and NASA ground stations via NASA's ATS-1 and ATS-3 satellites. These communication tests consisting of voice, date, time synchronization, ranging, interference and propagation were conducted between a U.S. Merchant ship, the S.S. Santa Lucia and NASA ground stations at Rosman, North Carolina; Mojave, California; and Cooby Creek, Australia. These tests were conducted in the VHF range during an actual 36 day voyage from Port Newark, New Jersey through the Panama Canal to Valparaiso, Chile and return. (Author)


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