It was the first satellite to use frequency-division multiple access which accepted multiple independent signals and downlinked them in a single carrier. The spacecraft measured inch (mm) in diameter, inch (mm) high and weighed lb (kg). The ATS-1 satellite was used during the 1967 international television broadcast Our World, providing a link between the United States and Australia during the program. The ATS-1 would remain operational for more than 18 years, until April, 1985.