As part of an experiment to facilitate international telecommunications, the US Military deployed an artificial space ring consisting of hundreds of millions of tiny copper needles[2] which would act as antennas reflecting radio signals at the target wavelength of 8 GHz. A large proportion of the needles were not dispersed properly and remained stuck in clumps that were discovered and tracked by the SSN between 1966 and 1991. As of October 2013[update], 46 of the 144 detected debris clumps remain in orbit.[1] The needles that were properly dispersed are believed to have decayed.[1]
^
Shapiro, I. I.; Jones, H. M.; Perkins, C.W. (May 1964), "Orbital properties of the West Ford dipole belt", Proceedings of the IEEE, 52 (5): 469–518, doi:10.1109/proc.1964.2992
^Bondi, H. (June 1962), "West Ford Project, Introductory Note by the Secretary", Quarterly Journal of the Royal Astronomical Society, 3: 99, Bibcode:1962QJRAS...3...99.
^"Protests Continue Abroad", The New York Times, London (published 23 October 1961), p. 12, 22 October 1961, ISSN0362-4331
Payloads are separated by bullets ( · ), launches by pipes ( | ). Crewed flights are indicated in underline. Uncatalogued launch failures are listed in italics. Payloads deployed from other spacecraft are denoted in (brackets).
