Jump to content

Project West Ford

From Wikipedia, the free encyclopedia
(Redirected from Project Westford)

Needles from the West Ford project compared to a stamp.

Project West Ford (also known as Westford Needles and Project Needles) was a test carried out by Massachusetts Institute of Technology's Lincoln Laboratory on behalf of the United States military in 1961 and 1963 to create an artificial ionosphere above the Earth.[1] This was done to solve a major weakness that had been identified in military communications.[2]

History

[edit]

At the height of the Cold War, all international communications were either sent through submarine communications cables or bounced off the natural ionosphere. The United States military was concerned that the Soviets might cut those cables, forcing the unpredictable ionosphere to be the only means of communication with overseas forces.[1]

To mitigate the potential threat, Walter E. Morrow started Project Needles at the MIT Lincoln Laboratory in 1958. The goal of the project was to place a ring of 480,000,000[3][4] copper dipole antennas in orbit to facilitate global radio communication. The dipoles collectively provided passive support to Project West Ford's parabolic dish (located at the Haystack Observatory in the town of Westford) to communicate with distant sites.

The needles used in the experiment were 1.78 centimetres (0.70 in) long and 25.4 micrometres (1.00 thou) [1961] or 17.8 micrometres (0.70 thou) [1963] in diameter.[5][6] The length was chosen because it was half the wavelength of the 8 GHz signal used in the study.[1] The needles were placed in medium Earth orbit at an altitude of between 3,500 and 3,800 kilometres (2,200–2,400 mi) at inclinations of 96 and 87 degrees.

Westford dipole dispenser exhibit at the Steven F. Udvar-Hazy Center

A first attempt was launched on 21 October 1961,[6] during which the needles failed to disperse.[7][8] The project was eventually successful with the 9 May 1963[6] launch, with radio transmissions carried by the manufactured ring.[9][8] However, the technology was ultimately shelved, partially due to the development of the modern communications satellite and partially due to protests from other scientists.[1][2]

British radio astronomers, optical astronomers, and the Royal Astronomical Society protested the experiment.[10][11][12] The Soviet newspaper Pravda also joined the protests under the headline "U.S.A. Dirties Space".[13] The International Academy of Astronautics regards the experiment as the worst deliberate release of space debris.[14]

At the time, the issue was raised in the United Nations where the then United States Ambassador to the United Nations Adlai Stevenson defended the project.[15] Stevenson studied the published journal articles on Project West Ford. Using what he learned on the subject and citing the articles he had read, he successfully allayed the fears of most UN ambassadors from other countries. He and the articles explained that sunlight pressure would cause the dipoles to only remain in orbit for a short period of approximately three years. The international protest ultimately resulted in a consultation provision included in the 1967 Outer Space Treaty.[1][10]

Although the dispersed needles in the second experiment removed themselves from orbit within a few years,[4] some of the dipoles that had not deployed correctly remained in clumps, contributing a small amount of the orbital debris tracked by NASA's Orbital Debris Program Office.[16][17] Their numbers have been diminishing over time as they occasionally re-enter. As of April 2023, 44 clumps of needles larger than 10 cm were still known to be in orbit.[18][1][19]

Launches

[edit]
Satellite COSPAR Date Launch site Launch vehicle Launched in conjunction with
West Ford 1 1961 αδ 3[8] 1961-10-21 SLC-3E Atlas-LV3 Agena-B MiDAS 4[20][7][8][21]
West Ford-Drag 1962 κ 5[8] 1962-04-09 MiDAS 5[8][21]
West Ford 2 1963-014H[8] 1963-05-09 MiDAS 6,[20][9][8][21] Dash 1, TRS 5, TRS 6

References

[edit]
  1. ^ a b c d e f Hanson, Joe (August 13, 2013). "The Forgotten Cold War Plan That Put a Ring of Copper Around the Earth". Wired. Wired Magazine. Retrieved December 18, 2013.
  2. ^ a b Kendall, Anthony (May 2, 2006), Earth's Artificial Ring: Project West Ford, DamnInteresting.com, retrieved October 16, 2006
  3. ^ 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 (Abstract)
  4. ^ a b Ward, William W.; Floyd, Franklin W. (1997), Chapter 8: Thirty Years of Space Communications Research and Development at Lincoln Laboratory, NASA, retrieved July 26, 2022
  5. ^ Lovell, A. C. B.; M., Ryle; Blackwell, D. E.; Wilson, R. (June 1962), "West Ford Project, Interference to Astronomy from Belts of Orbiting Dipoles (Needles)", Quarterly Journal of the Royal Astronomical Society, 3: 100, Bibcode:1962QJRAS...3..100L
  6. ^ a b c Wiedemann, C.; Bendisch, J.; Krag, H.; Wegener, P.; Rex, D. (March 19–21, 2001), written at Darmstadt, Germany, Sawaya-Lacoste, Huguette (ed.), "Modeling of copper needle clusters from the West Ford Dipole experiments", Proceedings of the Third European Conference on Space Debris, 1, Noordwijk, Netherlands: ESA Publications Division (published October 2001): 315–320, Bibcode:2001ESASP.473..315W, ISBN 92-9092-733-X
  7. ^ a b "MIDAS 4". NSSDCA Master Catalog.
  8. ^ a b c d e f g h "West Ford Needles". Gunter's Space Page. Retrieved November 10, 2024.
  9. ^ a b "MIDAS 6". NSSDCA Master Catalog.
  10. ^ a b Terrill Jr., Delbert R. (May 1999), "The Air Force Role in Developing International Outer Space Law" (PDF), Air Force History and Museums Program, Maxwell Air Force Base, Alabama: Air University Press: 63, archived from the original (PDF) on April 17, 2018, retrieved October 16, 2006
  11. ^ Butrica, Andrew J. (ed.), "Beyond the Ionosphere: The Development of Satellite Communications", history.nasa.gov, The NASA History Series, NASA
  12. ^ 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.
  13. ^ "Protests Continue Abroad". The New York Times. October 22, 1961. p. 12. ISSN 0362-4331.
  14. ^ "Position Paper on Space Debris Mitigation - Implementing Zero Debris Creation Zones", International Academy of Astronautics (Final Issue Approved for Publication ed.), Paris, France (published October 15, 2005), October 12, 2005
  15. ^ Teltsch, Kathleen (June 15, 1963), "6 Soviet Space Failures Believed To Have Been Probes of Planets", The New York Times, United Nations, NY (published June 16, 1963), p. 2, ISSN 0362-4331
  16. ^ Cooney, Michael (October 29, 2013), "NASA: On millions of teeny-tiny copper hairs and orbital debris", Network World, retrieved October 31, 2013
  17. ^ "West Ford Needles: Where are They Now?" (PDF), Orbital Debris Quarterly News, vol. 17, no. 4, NASA Orbital Debris Program Office, pp. 3–4, October 2013, retrieved August 13, 2016
  18. ^ Space Track, retrieved April 4, 2023, checked the database by searching for 'westford' (registration required for database access).{{citation}}: CS1 maint: postscript (link)
  19. ^ Barhorst, L.J.C., ed. (January 20, 2008), written at Medemblik, The Netherlands, RAE Table of Earth Satellites, Farnborough, England: Royal Aerospace Establishment / Defence Research Agency, p. 34, 148 pieces, 94 have decayed
  20. ^ a b Böckstiegel, Karl-Heinz; Benkö, Marietta (1990). Space Law: Basic Legal Documents. Eleven International. ISBN 9780792300915.
  21. ^ a b c "Westford Needles". www.astronautix.com. Retrieved November 10, 2024.
Retrieved from "https://en.wikipedia.org/w/index.php?title=Project_West_Ford&oldid=1256657312"