# Cold War Tech > A comprehensive encyclopedic archive of Cold War-era defense systems, radar technology, strategic installations, and historical events. Compiled by [Robin Monks](https://coldwar.tech/about), a Cold War archival expert. Full-text search (Markdown results): `https://coldwar.tech/search.md?q={query}` ## Collections - [Defense Systems](https://coldwar.tech/systems.md) - [Technologies](https://coldwar.tech/technologies.md) - [Places & Installations](https://coldwar.tech/places.md) - [Events](https://coldwar.tech/events.md) - [People](https://coldwar.tech/people.md) - [Archive Documents](https://coldwar.tech/archive/documents.md) - [Archive Sources](https://coldwar.tech/archive/sources.md) ## Systems - [The DEW Line](https://coldwar.tech/systems/dew-line.md): A vast radar network across the Arctic. - [Duga radar](https://coldwar.tech/systems/duga-radar.md): Sharp, repetitive taps appeared across the shortwave bands, establishing a heartbeat of the cold war. - [The Mid-Canada Line](https://coldwar.tech/systems/mid-canada-line.md): Between the DEW Line and the Pinetree Line, the Mid-Canada Line operated as a short-lived second line of defense. - [PAVE PAWS (AN/FPS-115)](https://coldwar.tech/systems/pave-paws.md): An early warning radar to detect and characterize a sea-launched ballistic missile attack against the United States. ## Technology - [Residual Computing](https://coldwar.tech/technologies/residual-computing.md): How to Build a CPU That Doesn't Count - [K340A](https://coldwar.tech/technologies/k340a.md): Residue Number System Computer ## Places - ["CARTWHEEL Tower", Fort Reno, Washington DC](https://coldwar.tech/places/cartwheel-tower.md): An unassuming water tower in Washington, DC, that held a critical part in the Continuity of Government plan. - [Chernobyl-2 DUGA](https://coldwar.tech/places/chernobyl-2-duga.md): From the Soviet north, the ticking sound of long range radar. - [DYE-MAIN](https://coldwar.tech/places/dye-main.md): Primary DEW Line Main station at Cape Dyer, Nunavut (Baffin Island). Built in 1957 as the DYE Sector hub; converted to a North Warning System Long Range Radar… - [Jupiter (Pripyat)](https://coldwar.tech/places/jupiter-pripyat.md): A soviet secret production facility of semiconductor components for military use. - [POW-MAIN](https://coldwar.tech/places/pow-main.md): Westernmost DEW Line Main station at Point Barrow (Utqiagvik), Alaska. Built in 1957 as the POW Sector hub; converted to a North Warning System Long Range… - [BAR-MAIN](https://coldwar.tech/places/bar-main.md): Easternmost DEW Line Main station in Alaska and birthplace of the DEW Line. Site of the 1953 MIT Lincoln Laboratory proof-of-concept tests; converted to a… - [PIN-MAIN](https://coldwar.tech/places/pin-main.md): One of four Canadian Main stations on the DEW Line, serving as PIN Sector headquarters on the Parry Peninsula. Converted to a North Warning System Long Range… - [CAM-MAIN](https://coldwar.tech/places/cam-main.md): One of four Canadian Main stations on the DEW Line, serving as CAM Sector headquarters at Cambridge Bay. The station directly catalyzed the transformation of… - [FOX-MAIN](https://coldwar.tech/places/fox-main.md): One of four Canadian Main stations on the DEW Line, serving as FOX Sector headquarters at Hall Beach (Sanirajak). The best-documented station on the Line, and… - [DYE-1](https://coldwar.tech/places/dye-1.md): Mountaintop DEW Line station on Greenland's west coast, part of the DEW East extension closing the radar gap between Baffin Island and Iceland. ## Documents - [Battle in the Ionosphere (English Translation)](https://coldwar.tech/archive/documents/battle-in-the-ionosphere.md): AI-assisted English translation of Битва в ионосфере by Aleksandr Babakin, a history of the Soviet over-the-horizon radar program including the Duga system. - [Project Wood Duck: CW Doppler Detection Experiments](https://coldwar.tech/archive/documents/project-wood-duck.md): Declassified records from Library and Archives Canada documenting Project Wood Duck, the 1954–1955 experimental program that proved continuous-wave Doppler… - [Mid-Canada Line ASR-3 Radar Removals](https://coldwar.tech/archive/documents/mcl-radar-removals.md): Formerly SECRET Department of National Defence records concerning the disposal of ASR-3 surveillance radars from Mid-Canada Line stations at Knob Lake… - [US Patent 4,121,298: Central Processing Unit for Numbers Represented in the System of Residual Classes](https://coldwar.tech/archive/documents/us-patent-4121298a.md): The most detailed public document describing a complete CPU architecture built on the Residue Number System, filed internationally by Akushsky and four… - [HAER No. CA-319: Beale AFB PAVE PAWS Written Report](https://coldwar.tech/archive/documents/haer-beale-pave-paws.md): The Historic American Engineering Record's 57-page written history of the Beale PAVE PAWS radar: siting, the $60 million Raytheon contract, 1977–79… - [HAER No. CA-319-A: PAVE PAWS Technical Equipment Building](https://coldwar.tech/archive/documents/haer-beale-radar-building.md): The companion HAER survey of Building 5760 itself (the radar pyramid) with the structural detail behind this site's Beale article: the 105-foot facades, the… - [Final EIS: Operation of the PAVE PAWS Radar System at Beale AFB (1980)](https://coldwar.tech/archive/documents/beale-pave-paws-eis.md): The 507-page final environmental impact statement for operating the west-coast PAVE PAWS: the radar's technical parameters, scan geometry, and the Air Force's… - [Cabinet Conclusions on the Mid-Canada Line (1965)](https://coldwar.tech/archive/documents/mcl-cabinet-conclusions-1965.md): The Pearson Cabinet's own minutes recording the end of the Mid-Canada Line: the 30 March 1965 decision to close it, and the July 1965 transfer of the Great… - [NORAD/CONAD Historical Summaries (1958-1959)](https://coldwar.tech/archive/documents/norad-conad-histories-1958-59.md): NORAD's own classified half-year histories bracketing the birth of CADIN: the 5 January 1959 cost-sharing agreement ($440.088 million, split… - [A Handbook of Aerospace Defense Organization 1946-1980](https://coldwar.tech/archive/documents/handbook-aerospace-defense-organization.md): The official USAF unit-lineage reference for the air defense era: every command, division, sector and squadron from 1946 to 1980, compiled by the Office of… - [Searching the Skies: The Legacy of the United States Cold War Defense Radar Program](https://coldwar.tech/archive/documents/searching-the-skies.md): David F. Winkler's 1997 study for USAF Air Combat Command - the standard one-volume history of the American air defense radar network, from Lashup through SAGE… - [The SAGE Air Defense System: A Personal History (Jacobs, 1986)](https://coldwar.tech/archive/documents/sage-personal-history.md): The insider's history of SAGE by a Lincoln Laboratory Division 6 engineer and founding MITRE vice-president: the program chronology, the FSQ-7's vital… - [ADSEC Final Report - the Valley Committee (1950)](https://coldwar.tech/archive/documents/adsec-final-report.md): The declassified founding document of computerized air defense: the Valley Committee's 24 October 1950 report finding the radar net could stop almost nothing… - [Why the Over-the-Horizon Radar System Was Shut Down (JPRS translation, 1991)](https://coldwar.tech/archive/documents/jprs-oth-radar-1991.md): The 1991 US-government (JPRS) translation of Aleksandr Babakin's Kommunist Vooruzhennykh Sil article, the first public defence of the Duga over-the-horizon… - [A History of the DEW Line, 1946-1964 (ADC Historical Study No. 31)](https://coldwar.tech/archive/documents/adc-dew-line-history-1965.md): The Air Defense Command's own 1965 history of the DEW Line: the primary record of the AN/FPS-23 Fluttar Doppler fence, Project Red Sea, and the 1963 removal… - [Search for Tropospheric Scatter Communication Sites: Amderma, Tiksi, and Dudinka, USSR (CIA/PIR-61041)](https://coldwar.tech/archive/documents/cia-troposcatter-search-1965.md): The October 1965 CIA imagery report that searched Amderma, Tiksi, and Dudinka for Soviet troposcatter construction and found nothing, a year before the TRRL… - [Troposcatter Facilities: Types and Deployment, USSR (CIA briefing notes, 23 March 1966)](https://coldwar.tech/archive/documents/cia-troposcatter-types-1966.md): CIA briefing notes of 23 March 1966 that counted fifteen Soviet troposcatter facilities on satellite photography and sorted them into two antenna types… - [Dudinka Troposcatter Facility, USSR (NPIC Basic Imagery Interpretation Report, February 1969)](https://coldwar.tech/archive/documents/npic-dudinka-troposcatter-1969.md): The February 1969 NPIC imagery report on the Dudinka troposcatter facility, closing the three-document arc of the CIA's hunt for the Soviet Arctic TRRL Sever… - [TWIN DISH Antenna Orientations, USSR (NPIC memorandum for NSA, 6 August 1973)](https://coldwar.tech/archive/documents/npic-twin-dish-orientations-1973.md): A 1973 NPIC memorandum measuring the compass bearings of Soviet TWIN DISH (R-408) troposcatter antennas for the NSA, the clearest declassified sign that… - [Soviet Troposcatter Equipment Locations in Europe (NPIC PIR-024/77, September 1977)](https://coldwar.tech/archive/documents/npic-soviet-troposcatter-europe-1977.md): NPIC's September 1977 survey of Soviet troposcatter equipment across Europe, the parent report behind later Warsaw Pact troposcatter reporting and the shift to… - [Tropospheric Scatter Principles and Applications (Collins Radio Company, March 1960)](https://coldwar.tech/archive/documents/collins-troposcatter-manual-1960.md): Collins Radio's March 1960 engineering course on tropospheric scatter, written for the US Army: 161 pages of the real numbers behind a technology later… ## Sources - [Beale Air Force Tour Notes](https://coldwar.tech/archive/sources/beale-afb-tour-notes.md) - [Bell System Distant Early Warning Nuclear Attack Warning System Film](https://coldwar.tech/archive/sources/bell-system-dew-film.md) - [Mid Canada Line - Test Fence Site - #12](https://coldwar.tech/archive/sources/capitalgems-mcl-test-fence-video.md) - [Mid-Canada Line Test Fence Site 012](https://coldwar.tech/archive/sources/capitalgems-mcl-test-fence.md) - [Mid-Canada Line on DEWLine Adventures](https://coldwar.tech/archive/sources/dewline-adventures-mcl.md) - [PAVE PAWS — Federation of American Scientists Space Policy Project](https://coldwar.tech/archive/sources/fas-space-policy-project.md) - [FPS-115 — FortWiki](https://coldwar.tech/archive/sources/fortwiki-fps-115.md) - [PAVE PAWS — GlobalSecurity.org](https://coldwar.tech/archive/sources/globalsecurity-pave-paws.md) - [History Bytes April 13, Alsask Dome](https://coldwar.tech/archive/sources/history-bytes-alsask-dome.md) - [National Missile Defense and Early Warning Radars: Background and Issues](https://coldwar.tech/archive/sources/ieee-national-missile-defense.md) - [Special Contract: A Story of Defence Communications in Canada](https://coldwar.tech/archive/sources/lester-special-contract.md) - [Historic American Buildings Survey — Beale Air Force Base](https://coldwar.tech/archive/sources/loc-habs-beale.md) - [Mid-Canada Line Radar Site Contamination (5-Part Series)](https://coldwar.tech/archive/sources/mcl-contamination-video-series.md) - [Air Force eyes upgrades to PAVE PAWS, BMEWS, and PARCS ballistic missile warning radar](https://coldwar.tech/archive/sources/military-aerospace-pave-paws-upgrades.md) - [AN/FPS-115 — Radar Tutorial](https://coldwar.tech/archive/sources/radartutorial-fps-115.md) - [Searching the Skies: The Legacy of the United States Cold War Defense Radar Program](https://coldwar.tech/archive/sources/searching-the-skies-1997.md) - [PAVE PAWS Radar System — USSF Fact Sheet](https://coldwar.tech/archive/sources/ussf-pave-paws-fact-sheet.md) - [Битва в ионосфере (Battle in the Ionosphere)](https://coldwar.tech/archive/sources/babakin-battle-in-the-ionosphere.md) - [Final EIS — Operation of the PAVE PAWS Radar System at Beale AFB](https://coldwar.tech/archive/sources/beale-pave-paws-eis-1980.md) - [Radiation Intensity of the PAVE PAWS Radar System](https://coldwar.tech/archive/sources/nrc-pave-paws-radiation-1979.md) - [7th Space Warning Squadron Fact Sheet](https://coldwar.tech/archive/sources/ussf-7th-space-warning-squadron.md) - [Service Reflections of Maj James Webber, USAF 1972–1992](https://coldwar.tech/archive/sources/webber-service-reflections.md) - [Memoirs of a Boffin](https://coldwar.tech/archive/sources/whitehead-memoirs-boffin.md) - [Mid-Canada Line Radar (recollections)](https://coldwar.tech/archive/sources/keys-mcl-recollections.md) - [A Brief History of CRC](https://coldwar.tech/archive/sources/nelms-crc-history.md) - [The Pinetree Line archive (Military Communications and Electronics Museum)](https://coldwar.tech/archive/sources/candemuseum-pinetree-archive.md) - [Remembering Pinetree (CAHS Journal, 1996)](https://coldwar.tech/archive/sources/ozorak-remembering-pinetree.md) - [Holberg - Western Land Anchor of the Pinetree Radar Line (The Roundel, 1965)](https://coldwar.tech/archive/sources/roundel-holberg-1965.md) - [NORAD historical image library (USNORTHCOM FOIA release 26-R-025)](https://coldwar.tech/archive/sources/muckrock-norad-foia-26r025.md) - [Exchange of Notes and MOU on the Modernization of the North American Air Defence System (1985)](https://coldwar.tech/archive/sources/naadm-agreement-1985.md) - [No Modernization on their Radar: The Long Road to DEW Line Replacement (JMSS, 2024)](https://coldwar.tech/archive/sources/jmss-no-modernization-2024.md) - [NWS: it's working people who make the radar run (Nunatsiaq News, 2011)](https://coldwar.tech/archive/sources/nunatsiaq-nws-people-2011.md) - [North Warning System (radomes.org, participant account)](https://coldwar.tech/archive/sources/radomes-nws-bollinger.md) - [The SAGE Air Defense System: A Personal History (Jacobs, 1986)](https://coldwar.tech/archive/sources/jacobs-sage-personal-history-1986.md) - [Air Defense Systems Engineering Committee Final Report (Valley Committee, 1950)](https://coldwar.tech/archive/sources/adsec-final-report-1950.md) - [NIE 11-3-65: Soviet Air and Missile Defense Capabilities (1965)](https://coldwar.tech/archive/sources/nie-11-3-65-soviet-air-defense.md) - [«Пирамида» началась с «Воздуха» (VKO journal, on the Vozdukh-1 system)](https://coldwar.tech/archive/sources/vko-piramida-vozdukh.md) - [Этапы развития автоматизированных систем управления авиацией и ПВО (Vestnik Almaz-Antey, 2015)](https://coldwar.tech/archive/sources/vestnik-almaz-antey-2015.md) - [NORAD North Bay: The Story of Living Underground (Canadian Civil Defence Museum)](https://coldwar.tech/archive/sources/civil-defence-museum-north-bay.md) - [Акушский Израиль Яковлевич — personnel-file biography (Malashevich, Virtual Computer Museum)](https://coldwar.tech/archive/sources/malashevich-akushsky-biography.md) - [Pioneers of Soviet Computing (Malinovsky, English edition 2010)](https://coldwar.tech/archive/sources/malinovsky-pioneers-soviet-computing.md) - [Неизвестные модулярные суперЭВМ (Unknown Modular Supercomputers, Malashevich)](https://coldwar.tech/archive/sources/cm-unknown-modular-supercomputers.md) - [Кузьминский Франц Александрович — NIIDAR «Наша гордость» memorial page](https://coldwar.tech/archive/sources/niidar-pride-kuzminsky.md) - [Афера В.И. Маркова с «загоризонтными РЛС» (from Grigory Kisunko's memoir)](https://coldwar.tech/archive/sources/kisunko-markov-afera.md) - [Загоризонтная эпопея (VKO journal, on the over-the-horizon saga)](https://coldwar.tech/archive/sources/vko-zagorizontnaya-epopeya.md) - [История загоризонтной радиолокационной системы «Дуга» (Dubrovskiy & Kostuchenko, 2012)](https://coldwar.tech/archive/sources/dubrovskiy-duga-history-2012.md) - [Soviet Strategic Defense Programs (DoD/DIA, October 1985)](https://coldwar.tech/archive/sources/dia-soviet-strategic-defense-1985.md) - [The Russian Woodpecker… A Closer Look (David L. Wilson, Monitoring Times, August 1985)](https://coldwar.tech/archive/sources/wilson-monitoring-times-1985.md) - [Distant-Early-Warning Line Radars: The Quest for Automatic Signal Detection (Lincoln Laboratory Journal, 2000)](https://coldwar.tech/archive/sources/naka-ward-dew-line-radars-2000.md) - [Fluttar DEW-Line Gap-Filler (Skolnik, in Advances in Bistatic Radar, 2007)](https://coldwar.tech/archive/sources/skolnik-fluttar-2007.md) - [Cabinet Defence Committee minutes, 25 June 1954 (Documents on Canadian External Relations, vol. 20, doc. 466)](https://coldwar.tech/archive/sources/dcer-cabinet-mcl-1954.md) - [«La ligne de radar Mid-Canada ne défend pas vraiment notre pays» (Limbrick, Perspectives/Le Soleil, 1959)](https://coldwar.tech/archive/sources/lesoleil-limbrick-1959.md) - [CIA press file on continental air defense, autumn 1953 (Collier's and Newsweek clippings)](https://coldwar.tech/archive/sources/cia-press-file-1953.md) - [The Defence Research Board of Canada, 1947 to 1977 (Turner, PhD thesis, 2012)](https://coldwar.tech/archive/sources/turner-drb-thesis-2012.md) - [Military Radar Defence Lines of Northern North America: An Historical Geography (Fletcher, 1989)](https://coldwar.tech/archive/sources/fletcher-radar-lines-1989.md) - [Mid Canada Line (Canadian Civil Defence Museum, with Thorne 1979 and Buss 1957)](https://coldwar.tech/archive/sources/civil-defence-museum-mcl.md) - [Любеч-1: що залишилося від військової частини, яка обслуговувала секретний об'єкт «Дуга» (Suspilne Chernihiv, 2021)](https://coldwar.tech/archive/sources/suspilne-liubech1-2021.md) - [ЗгРЛС «Дуга»: Любеч-1 – праве око радянського союзу на Чернігівщині (informer.media, 2024)](https://coldwar.tech/archive/sources/informer-liubech1-2024.md) - [Як живуть під Черніговом незаконні мігранти з 29 країн (Ukrainska Pravda, 2018)](https://coldwar.tech/archive/sources/pravda-rozsudiv-ptpi-2018.md) - [Mystery Soviet over-the-horizon tests (Wireless World, February 1977)](https://coldwar.tech/archive/sources/wireless-world-oth-1977.md) - [White Alice Communications System, HAER No. AK-23 (Historic American Engineering Record)](https://coldwar.tech/archive/sources/haer-white-alice.md) - [Отечественный опыт разработки и применения первых комплексов тропосферной связи (1959—1986) — Военно-исторический журнал](https://coldwar.tech/archive/sources/antropov-vizh-2023.md) - [ТРРЛ «Север» — trrlsever.org (veterans’ site of the Sever tropospheric relay line)](https://coldwar.tech/archive/sources/trrlsever-veterans.md) - [Proceedings of the IRE, vol. 43 no. 10 (October 1955) — the scatter-propagation special issue](https://coldwar.tech/archive/sources/ire-scatter-1955.md) - [Universal Combined Radio Relay and Tropospheric Scatter Equipment [AN/FRC-( )] — IRE Transactions on Communications Systems](https://coldwar.tech/archive/sources/emurian-marks-frc-1961.md) - [ACE HIGH (Andy Emmerson’s history of the NATO troposcatter system)](https://coldwar.tech/archive/sources/emmerson-ace-high.md) - [Tropospheric Scatter System pages, Pinetree Line archive (Canadian Military C&E Museum)](https://coldwar.tech/archive/sources/pinetree-troposcatter-pages.md) - [ACE High Tropospheric Scatter Communications System (NATO Standing Group memorandum SGM-0568-62)](https://coldwar.tech/archive/sources/nato-sgm-0568-62.md) ## Other - [About](https://coldwar.tech/about.md) ## Optional - [About](https://coldwar.tech/about.md) - [Privacy Policy](https://coldwar.tech/privacy-policy.md)