Applications Technology Satellites

thumb|right|ATS-6 during radio-frequency tests. thumb|right|ATS-6 during radio-frequency tests. ATS-6 (Applications Technology Satellite-6) was a NASA experimental satellite, built by Fairchild Space and Electronics Division It has been called the world's first educational satellite as well as world's first experimental Direct Broadcast Satellite as part of the Satellite Instructional Television Experiment between NASA and Indian Space Research Organisation (ISRO). It was launched May 30, 1974, and decommissioned July 1979. At the time of launch, it was the most powerful telecommunication sate

ATS-1 (Applications Technology Satellite 1), also designated ATS-B or Advanced Tech. Sat. 1, was an experimental geostationary satellite, launched in 1966, and part of the Applications Technology Satellites Program. Though intended as a communications satellite rather than as a weather satellite, it carried the Spin Scan Cloud Camera developed by Verner E. Suomi and Robert Parent at the University of Wisconsin.

ATS-2 (Applications Technology Satellite) was a communications satellite launched by NASA on April 6, 1967, on an Atlas-Agena D rocket from Cape Canaveral.

experimental series of NASA communications satellites

ATS-5 (Applications Technology Satellite-5) also known as ATS-E was a communications satellite launched into geosynchronous orbit on August 12, 1969. Built by Hughes Aircraft and launched by NASA, it was the final Hughes/NASA joint mission in the Applications Technology Satellites program.

Applications Technology Satellite 3, or ATS-3, was a long-lived American experimental geostationary weather and communications satellite, operated by NASA from 1967 to 2001. It was at one time reputed to be the oldest satellite still in operation. , NASA referred to the ATS-3 as "The oldest active communications satellite by a wide margin."

ATS-4 (Applications Technology Satellite) also known as ATS-D was a communications satellite launched by NASA on August 10, 1968 from Cape Canaveral through an Atlas-Centaur (AC-17) rocket.