Air Defense Direction Center

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Air Defense Direction Center
NORAD sector direction center (NSDC)[1]
command, control, and coordination
military installation
Country United States

An Air Defense Direction Center[2]:11 (ADDC) was a type of United States command post for assessing Cold War radar tracks, assigning height requests to available height-finder radars, and for "Weapons Direction": coordinating command guidance of aircraft from more than 1 site for ground-controlled interception ("weapons assignment").[3] As with the World War II Aircraft Warning Service CONUS defense network, a "manual air defense system"[4] was used through the 1950s (e.g., NORAD/ADC used a "Plexiglass [sic] plotting board" at the Ent command center.)[5]:151 Along with 182 radar stations at "the end of 1957, ADC operated … 17 control centers",[5]:223 and the Ground Observation Corps was TBD on TBD. With the formation of NORAD, several types of ADDCs were planned by Air Defense Command:

Most ADDCs were replaced by Regional Operations Control Centers of the Joint Surveillance System (FOC on December 23, 1980).[7]


  1. ^ Missile Master… (field manual), FM44-1, United States Army, February 1963, AN/FSG-1 … f. Utilizes reference track data from local radars and voice communications with the NORAD sector direction center (NSDC) … 22. Normal Tracking The S & E officers and the trackers monitor the SAGE reference track data … 34. General … The two surveillance and entry consoles…are separated by a channel status unit … "Missile Master organic radars:" … SAGE SELECTOR two-position switch: Selects SAGE 1 or SAGE 2 (primary or secondary SAGE DC) as the source of SAGE data. … 45. Range-Height Subsystem a. Equipment. The range-height equipment consists of two RHI consoles (fig. 15) and two antenna control units 
  2. ^ Preface by Buss, L. H. (Director) (1 October 1958). North American Air Defense Command Historical Summary: January–June 1958 (Report). Directorate of Command History: Office of Information Services. 
  3. ^ Lincoln Laboratory memorandum 6M-3797 which cites "6M-3788, "Weapons Direction Requirements," R. Nelson) … SAGE designation of targets directly to AA batteries … CAPE COD DIRECTION CENTER … Memorandum 6M-2926-3, "Lighting Requirements for AN/FSQ-7 Direction Centers," … 6M-3772…Requirements for Separate Rani-Air Training Command Direction Center Facility"
  4. ^ In Your Defense (digitized movie). Narrated by Colonel John Morton. Western Electric. Retrieved 2012-04-03. The System Development Corporation…in the design of massive computer programs … Burroughs…electronic equipment … Western Electric…assist the Air Force in coordinating and managing the entire effort…and design of buildings. …SAGE project office…Air Material Command 
  5. ^ a b c Schaffel, Kenneth (1991). Emerging Shield: The Air Force and the Evolution of Continental Air Defense 1945-1960. General Histories (Report). Office of Air Force History. ISBN 0-912799-60-9. Archived from the original (45MB pdf) on 2005-11-13. Retrieved 2011-09-26. A SAGE component, a 64 x 64 [4K] magnetic core memory … SAGE direction center. This installation is located at Stewart Air Force Base in New York state. …[Hancock Field] combined direction-combat center was located at Syracuse, New York.  [captions of pp. 198, 208, & 265 photos] NOTE: Schaffel's history uses the same name as "The Emerging Shield: The Air Defense Ground Environment," Air University Quarterly Review 8, no. 2 (spring 1956).
  6. ^ a b c d Preface by Buss, L. H. (Director) (14 April 1959). North American Air Defense Command and Continental Air Defense Command Historical Summary: July–December 1958 (Report). Directorate of Command History: Office of Information Services. 
  7. ^ a b Del Papa, Dr. E. Michael; Warner, Mary P. (October 1987). A Historical Chronology of the Electronic Systems Division 1947-1986 (PDF) (Report). Retrieved 2012-07-19. so-called Semi-Automatic Direction Center System, later known as…Semi-Automatic Ground Environment System, in essence, the Lincoln Transition System. 
  8. ^ Lincoln Laboratory Memorandum 6M-3797: The operational specifications for the SAGE Direction Center (Schaffel p. 208 also identifies the term)
  9. ^ Philips, Alan F. "20 Mishaps That Might Have Started Accidental Nuclear War". Issues (Accidents) webpage. Retrieved 2013-05-04. At around midnight on October 25, a guard at the Duluth Sector Direction Center saw a figure climbing the security fence. He shot at it, and activated the "sabotage alarm." … and the Klaxon sounded which ordered nuclear armed F-106A interceptors to take off. … The original intruder was a bear. 
  10. ^ 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. pp. 211, 306. the GPA-37 electronic heart of an advanced system of ground controlled interception which immediately preceded SAGE, and with SAGE itself. … The AN/GPA-35 was a pre-SAGE control system that would be used until SAGE was ready.