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Apollo Abort Guidance System
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Apollo Abort Guidance System
The Apollo Abort Guidance System (AGS, also known as Abort Guidance Section) was a backup computer system providing an abort capability in the event of failure of the Lunar Module's primary guidance system (Apollo PGNCS) during descent, ascent or rendezvous. As an abort system, it did not support guidance for a lunar landing.
The AGS was designed by TRW independently of the development of the Apollo Guidance Computer and PGNCS.
It was the first navigation system to use a strapdown Inertial Measurement Unit rather than a gimbaled gyrostabilized IMU (as used by PGNCS). Although not as accurate as the gimbaled IMU, it provided satisfactory accuracy with the help of the optical telescope and rendezvous radar. It was also lighter and smaller in size.
The Abort Guidance System included the following components:
The computer used was MARCO 4418 (MARCO stands for Man Rated Computer) whose dimensions were 5 by 8 by 23.75 inches (12.7 by 20.3 by 60.33 centimeters); it weighed 32.7 pounds (14.83 kg) and required 90 watts of power. Because the memory had a serial access it was slower than AGC, although some operations on AEA were performed as fast or faster than on AGC.
The computer had the following characteristics:
The AEA has the following registers:
Other registers include:
Hub AI
Apollo Abort Guidance System AI simulator
(@Apollo Abort Guidance System_simulator)
Apollo Abort Guidance System
The Apollo Abort Guidance System (AGS, also known as Abort Guidance Section) was a backup computer system providing an abort capability in the event of failure of the Lunar Module's primary guidance system (Apollo PGNCS) during descent, ascent or rendezvous. As an abort system, it did not support guidance for a lunar landing.
The AGS was designed by TRW independently of the development of the Apollo Guidance Computer and PGNCS.
It was the first navigation system to use a strapdown Inertial Measurement Unit rather than a gimbaled gyrostabilized IMU (as used by PGNCS). Although not as accurate as the gimbaled IMU, it provided satisfactory accuracy with the help of the optical telescope and rendezvous radar. It was also lighter and smaller in size.
The Abort Guidance System included the following components:
The computer used was MARCO 4418 (MARCO stands for Man Rated Computer) whose dimensions were 5 by 8 by 23.75 inches (12.7 by 20.3 by 60.33 centimeters); it weighed 32.7 pounds (14.83 kg) and required 90 watts of power. Because the memory had a serial access it was slower than AGC, although some operations on AEA were performed as fast or faster than on AGC.
The computer had the following characteristics:
The AEA has the following registers:
Other registers include: