The D-37C (D37C) is the computer component of the all-inertial NS-17 Missile Guidance Set (MGS) for accurately navigating to its target thousands of miles away. The NS-17 MGS was used in the Minuteman II (LGM-30F) ICBM. The MGS, originally designed and produced by the Autonetics Division of North American Aviation, could store multiple preprogrammed targets in its internal memory. The next major update to the operational software was made under the Guidance Replacement Program. Autonetics (later acquired by The Boeing Co.) developed the necessary software for the new flight computer.
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| - Le D-37C (ou D37) est le calculateur de l’ensemble de guidage du missile (MSG) tout-inertiel NS-17. Cette fonction informatique lui permet de naviguer avec précision jusqu’à sa cible, à des milliers de kilomètres. Le NS-17 MGS a été utilisé dans l’ICBM Minuteman II (LGM-30F). Le MGS, conçu et produit à l'origine par la division Autonetics de North American Aviation, pouvait stocker plusieurs cibles préprogrammées dans sa mémoire interne. (fr)
- The D-37C (D37C) is the computer component of the all-inertial NS-17 Missile Guidance Set (MGS) for accurately navigating to its target thousands of miles away. The NS-17 MGS was used in the Minuteman II (LGM-30F) ICBM. The MGS, originally designed and produced by the Autonetics Division of North American Aviation, could store multiple preprogrammed targets in its internal memory. The next major update to the operational software was made under the Guidance Replacement Program. Autonetics (later acquired by The Boeing Co.) developed the necessary software for the new flight computer. (en)
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| - The D-37C (D37C) is the computer component of the all-inertial NS-17 Missile Guidance Set (MGS) for accurately navigating to its target thousands of miles away. The NS-17 MGS was used in the Minuteman II (LGM-30F) ICBM. The MGS, originally designed and produced by the Autonetics Division of North American Aviation, could store multiple preprogrammed targets in its internal memory. Unlike other methods of navigation, inertial guidance does not rely on observations of land positions or the stars, radio or radar signals, or any other information from outside the vehicle. Instead, the inertial navigator provides the guidance information using gyroscopes that indicate direction and accelerometers that measure changes in speed and direction. A computer then uses this information to calculate the vehicle's position and guide it on its course. Enemies could not "jam" the system with false or confusing information. The Ogden Air Logistics Center at Hill AFB has been Program Manager for the Minuteman ICBM family since January 1959. The base has had complete logistics management responsibilities for Minuteman and the rest of the ICBM fleet since July 1965. The D-37C computer consists of four main sections: the memory, the central processing unit (CPU), and the input and output units. These sections are enclosed in one case. The memory is a two-sided, fixed-head disk which rotatesat 6000 rpm. It contains 7222 words of 27 bits. Each word contains 24 data bits and three spacer bits not available to the programmer. The memory is arranged in 56 channels of 128 words each plus ten rapid access channels of one to sixteen words. The memory also includes the accumulators and instruction register. The MM II missile was deployed with a D-37C disk computer. Autonetics also programmed functional simulators for flight program development and testing, and the code inserter verifier that was used at Wing headquarters to generate the codes to go into the airborne computer. It became necessary to verify not only that the flight program software was correct, but there was no code that would lead toward an unauthorized or accidental launch. TRW, Inc. continued its role of independent verification that first called verification and validation and then became nuclear safety cross check analysis (NSCCA). Logicon RDA was selected to perform the NSCCA of the targeting and execution plan programs developed by TRW.[1] When MM III was developed, Autonetics generated the guidance equations that were programmed into the D37D computer, which contained a hybrid explicit guidance system for the first time. A new class of program was required by the Joint Strategic Targeting Planning Staff to select targets for the multiple warhead system. The Missile Application Programs were developed for these functions. The next major update to the operational software was made under the Guidance Replacement Program. Autonetics (later acquired by The Boeing Co.) developed the necessary software for the new flight computer. (en)
- Le D-37C (ou D37) est le calculateur de l’ensemble de guidage du missile (MSG) tout-inertiel NS-17. Cette fonction informatique lui permet de naviguer avec précision jusqu’à sa cible, à des milliers de kilomètres. Le NS-17 MGS a été utilisé dans l’ICBM Minuteman II (LGM-30F). Le MGS, conçu et produit à l'origine par la division Autonetics de North American Aviation, pouvait stocker plusieurs cibles préprogrammées dans sa mémoire interne. (fr)
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