Experimental SAGE Subsector

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The Experimental Semi-Automatic Ground Environment (SAGE) Sector (ESS, Experimental SAGE Subsector[1] until planned Sectors/Subsectors were renamed NORAD Regions, Divisions, and Sectors)[2] was a prototype Cold War Air Defense Sector for developing the Semi Automatic Ground Environment. The Lincoln Laboratory control center in a new building[3] was at Lexington, Massachusetts.

ESS Computer System

The network's Direction Center was completed in a new 1954 building[3] (Building F,[4] [ ⚑ ] 42°27′37″N 071°16′04″W / 42.46028°N 71.26778°W / 42.46028; -71.26778[5]) with prototype peripherals and a single IBM XD-1 computer,[6] a successor to Lincoln Lab's Whirlwind I computer (WWI).[7] In 1955, Air Force personnel began IBM training at the Kingston, New York, prototype facility,[8] and the "4620th Air Defense Wing (experimental SAGE) was established[when?] at Lincoln Laboratory"—its "primary mission was computer programming".[9]

ESS had a capacity of 48 tracks and used a pre-SAGE ground environment in a "prototype intercept monitor room [at] MIT's Barta building" with "track situation displays, which geographically showed Air Defense Identification Zone lines and antiaircraft circles [and] each console also had a 5-inch CRT for digital information display. Audible alert signals were used, with a different signal for each symbol on a situation display."[10]

Radar stations

Initial service test models of the Burroughs AN/FST-2 Coordinate Data Transmitting Set were placed with radars at South Truro and West Bath, Maine; followed by Texas Tower#2 (TT2) in the Atlantic Ocean, which provided a "triangular pattern with overlap" radar coverage[11] (TT2 later had a connection from the XD-1 via the GE G/A Data Link Output Subsystem through North Truro Air Force Station .)[12] By August 1955, 13 radar stations were networked by the subsector,[10] e.g.:

Required by 21 November 1955 were 44 consoles: 38 for the operations floor, 3 on the computer floor for display maintenance, and 3 near the maintenance console (program checkout).[23] WWI was connected to the Experimental SAGE Subsector to verify crosstelling (collateral communication) with the ESS DC, and WWI was also used for a Ground-to-Air (G/A) experiment using a transmitter of the GE G/A Data Link Output Subsystem on Prospect Hill, Waltham, MA sending data to simulated airborne equipment at Lexington.[12] Transmissions from the WWI SAGE Evaluation (WISE) computer system[3] to XD-1 and back were without error by December 1955[3] when operational software specifications were frozen.[24] Operating procedures for the ESS external sites were complete in March 1956,[25] and

System Operation Testing

From November 15, 1955, to November 7, 1956, three System Operation Tests were conducted[10] which used voice "Ground-to-Air" communication from the Barta control room to aircraft outfitted with SAGE receivers[26] (F-86 interceptors modified to F-86L models in "Project FOLLOW-ON".)[27] Test teams included employees of Bell Telephone Laboratories, Western Electric-ADES, IBM, the RAND Corporation, and Lincoln Labs' Division 6, Division 3, & Division 2[4] (Division 6 had been created for ESS support.)[28]

The North Truro P-10 AN/FST-2 was moved to Almaden Air Force Station (M-96)c. 1957-8[27] and on August 7, 1958, control of an airborne BOMARC missile that had malfunctioned transferred from the "Experimental SAGE Sector" to a Westinghouse AN/GPA-35 Ground Environment system[where?] and the missile crashed into the Atlantic Ocean.[29] By December 31, 1958, ADC Manual 55-28 described the Model 3 SAGE System.[30]

External images
Military operators at ESS consoles
""Prototype intercept monitor room in the SAGE direction center in MIT's Barta building." [dated February 19, 1955 at archive[dot]today[slash]tPdY2]

1959 Experimental Testing

"To prove out the revised SAGE computer program" for Automatic Targeting and Battery Evaluation and ADDC-AADCP crosstelling, a "SAGE/Missile Master" test was conducted beginning in September 1959 with communications between the ESS XD-1 and Martin AN/FSG-1 Antiaircraft Defense System equipment at Fort Banks[31] planned for the CONAD Joint Control Center at Fort Heath[32]—a "SAGE ATABE Simulation Study" (SASS) was also completed 1959-60 by MITRE Corporation.[33]

References

  1. ↑ "Data Reliability of Three Bell A1 Magnetic Tape Recording Systems". Defense Technical Information Center. http://www.dtic.mil/cgi-bin/GetTRDoc?AD=AD0419183. 
  2. ↑ Template:Cite NORAD Historical Summary
  3. ↑ 3.0 3.1 3.2 3.3 Wildes, Karl L.; Lindgren, Nilo A. (1986). A Century of Electrical Engineering and Computer Science at MIT, 1882-1982. MIT Press. p. 299. ISBN 9780262231190. https://archive.org/details/centuryofelectri0000wild. Retrieved 2014-08-07. "The first experimental subsector was a square approximately 400 nautical miles on a side and centered at Sourh Truro, Massachusetts. A new building was constructed at Lincoln Laboratory to house the XD-1 computer [which] was received from IBM in January" 
  4. ↑ 4.0 4.1 Redmond, Kent C; Smith, Thomas Malcom (2000) (Google Books). From Whirlwind to MITRE: The R&D Story of The SAGE Air Defense Computer. MIT Press. ISBN 9780262264266. https://books.google.com/books?id=dxZVbxcf_IoC&q=SAGE+ESS+mitre&pg=PA374. Retrieved 2013-05-02. "in Poughkeepsie…IBM engineers ran through a final series of tests before dismantling the XD-1 for shipment… Division 6 engineers began to ready the XD-1 for…the Experimental SAGE Subsector … eight subsystems [were] input or output channels to the XD-1.14 … preliminary testing of ESS subsystems into which the pieces of equipment were integrated… gap-filler inputs, long-range radar inputs, height-finder inputs, ground-to-air outputs, automatic teletype outputs, crosstelling, ground-to air voice radio, and wire communications. …test teams were composed of individuals from Division 6, Division 3, Division 2, Bell Labs, Western Electric-ADES, IBM, and the RAND Corporation…17 … a small-scale air defense system, Whirlwind I SAGE Evaluation (WISE)…much simpler than the 1954 Cape Cod System… WISE will be modified for crosstelling to XD-1.21" 
  5. ↑ "Display site". radomes.org. http://www.radomes.org/museum/showsite.php?site=Lincoln+Lab+ESS,+MA. 
  6. ↑ "Introduction". Ed-Thelen.org. http://ed-thelen.org/SageIntro.html.  (p. 7)
  7. ↑ "Vigilance and Vacuum Tubes: The SAGE System 1956-63" (SAGE Talk Transcript). Ed-Thelen.org. 1998. http://ed-thelen.org/Sage-Talk.html. "the Whirlwind computer, which was a digital version of the ASCA, was about five million dollars, in 1950’s [sic] dollars … For the 1949 fiscal year, MIT requested 1.5 million dollars for the Whirlwind project. … one [SAGE computer] was at Lincoln Lab, …the XD-1, and the other one was at Kingston, the XD-2. So we used both those sites for development. … The XD-1 was a simplex system…not duplex … the original vacuum-tube computers—the last one was finally taken down in 1983, still operating. … IBM got…about 500 million dollars…to build the 56 computers." 
  8. ↑ Edwards, Benj (January 24, 2013). "…World's First Computer Art…". The Atlantic. https://www.theatlantic.com/technology/archive/2013/01/the-never-before-told-story-of-the-worlds-first-computer-art-its-a-sexy-dame/267439/. Retrieved 2013-02-16. 
  9. ↑ Schaffel, Kenneth (1991). "Emerging Shield: The Air Force and the Evolution of Continental Air Defense 1945-1960" (45MB pdf). General Histories (Office of Air Force History): 283 (pdf). ISBN 0-912799-60-9. https://archive.org/details/TheEmergingShield/page/283. Retrieved 2011-09-26. 
  10. ↑ 10.0 10.1 10.2 "MIT Lincoln Laboratory: History: Cape Cod SAGE Prototype (Continued)". http://www.ll.mit.edu/about/History/capecodprototype-2.html. 
  11. ↑ https://dome.mit.edu/bitstream/handle/1721.3/40551/MC665_r15_M-3832.pdf?sequence=1 |quote=ADES JPO initial Burroughs service test models of FST-2…would be placed at South Truro and Bath, respectively, in order to have an operational experimental subsector containing two heavy radars by 1 April 1956 [and] the third FST-2 on Texas Tower #2 [for] a triangular pattern providing overlap. XD-1 display system External Environment of XD-1…XD-1 Direction Center
  12. ↑ 12.0 12.1 (synopsis (MC665_r14_6M-3797.pdf)) Biweekly Report For Period Ending 23 March 1956 (Report). Lincoln Laboratory Division 6. http://dome.mit.edu/bitstream/handle/1721.3/46009/MC665_r14_6M-4263.pdf?sequence=1. Retrieved 2014-08-02. 
  13. ↑ "Display site". radomes.org. http://www.radomes.org/museum/showsite.php?site=Chatham+ESS,+MA. 
  14. ↑ "Pinetree Line Miscellaneous - Radar Equipment". 67.69.104.76:84. http://67.69.104.76:84/Pinetreeline/misc/equip/misc12aa.html. 
  15. ↑ "Download Mozilla Firefox Optimized for Yahoo". northamericanforts.com. http://www.northamericanforts.com/East/New_Hampshire/Towers/Great_Boars_Head.html. 
  16. ↑ "Download Mozilla Firefox Optimized for Yahoo". northamericanforts.com. http://www.northamericanforts.com/East/New_Hampshire/Towers/Halibut_Point.html. 
  17. ↑ [1] (see also Radomes.org listing for West Bath
  18. ↑ "Recent photos of Scituate (MA) Experimental SAGE Subsector (ESS) Radar Site". radomes.org. http://www.radomes.org/museum/recent/ScituateESSMA.html. 
  19. ↑ "MITRE Radar Test Sites South Truro, Cape Cod, MA; Jug Handle Hill, West Bath, ME; Montauk LI, NY". radomes.org. http://www.radomes.org/museum/equip/MITRESouthTruroMA.html. 
  20. ↑ "West Bath MITRE AN/FPS-31 Radar Test Site". wikimapia.org. http://wikimapia.org/17058280/West-Bath-MITRE-AN-FPS-31-Radar-Test-Site. 
  21. ↑ "MIT Lincoln Laboratory: History: SAGE Radars (part 3)". ll.mit.edu. http://www.ll.mit.edu/about/History/earlywarningradars3.html. 
  22. ↑ "Bath Independent, May 10, 1956". newspaperarchive.com. 10 May 1956. https://newspaperarchive.com/us/maine/bath/bath-independent/1956/05-10/page-5. 
  23. ↑ "Error: no |title= specified when using {{Cite web}}". dome.mit.edu. http://dome.mit.edu/bitstream/handle/1721.3/40520/MC665_r15_M-3857.pdf?sequence=1. 
  24. ↑ Johnson, Stephen B. (Google Books). The United States Air Force and the culture of innovation 1945-1965. Air Force History Support Office. p. 159. ISBN 9781428990272. https://books.google.com/books?id=3HgQp6f9yGQC&q=%22Master+Direction+Center%22&pg=PA156. 
  25. ↑ Memorandum 6M-4071 "Requirements for Operating Procedures for External Sites in the Experimental SAGE Subsector (ESS)" by M. DiCarlo-Cottone. (cited by Lincoln memo 6M-3797)
  26. ↑ From Whirlwind to MITRE: The R&D Story of the SAGE Air Defense Computer. MIT Press. 2000-10-10. p. 374. ISBN 9780262264266. https://books.google.com/books?id=dxZVbxcf_IoC. Retrieved 2015-05-18. 
  27. ↑ 27.0 27.1 Cite NORAD Historical Summary |year=1956-7 |quote=Project FOLLOW-ON provided the third improved model -the F-86L --which was an F-86D with modernized electronic gear and wings with slatted leading edges. … Project FOLLOW-ON was to make the F-86D compatible with the new [pre-SAGE] AN/GPA-37. … Eleven squadrons were meeting Project FOLLOW-ON schedules by 30 June 1957.
  28. ↑ Stephen B. Johnson. The United States Air Force and the culture of innovation 1945-1965. DIANE Publishing. p. 151. ISBN 9781428990272. https://books.google.com/books?id=3HgQp6f9yGQC. Retrieved 2015-05-18. 
  29. ↑ McMullen, R. F. (15 Feb 1980). History of Air Defense Weapons 1946–1962 (Report). ADC Historical Study No. 14. Historical Division, Office of information, HQ ADC. p. 312. 
  30. ↑ http://www.airforcehistoryindex.org/data/000/461/733.xml |quote=SAGE SYSTEM DESCRIPTION, MODEL 3, ADCM 55-28 COMPLETED AND PUBLISHED
  31. ↑ Cite NORAD Historical Summary |year=1958 |period=July–December
  32. ↑ lst Ind, (ADC to CONAD, "Site Adaptation Plans for CONAD Joint Direction Centers," 22 Oct 1957), CINCNORAD to C/S USAF, 1 Nov 1957 [cited by the NORAD Historical Summary for 1957 July–December)
  33. ↑ "Error: no |title= specified when using {{Cite web}}". deepblue.lib.umich.edu. http://deepblue.lib.umich.edu/bitstream/handle/2027.42/4298/bab9742.0001.001.pdf?sequence=5. 



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