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The Apollo Guidance Computer used a plus/minus sign and 5 decimal digits. This can be seen in the "List of Nouns Used in Program Colossus" of the AGC manual as well as the number of digits on the DSKY user interface: There are various data types used by the nouns. A table in the source file PINBALL_NOUN_TABLES.agc controls how each noun is ...


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The Apollo LM was developed with a self-landing capability in its software, though in practice the mission commander took over manual control at around 150 meters altitude in all the actual landings. It used a radar altimeter for real-time altitude determination, and was accurate to within about 2 meters at low altitude, which doesn't sound great, but the LM'...


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With the following constraints, it should at least be theoretically possible: The rocket is rotationally symmetric around an axis. The rocket is spinning around some axis that is not the symmetry axis. The first should be known a-priori. If we can then find the spin axis, the centre of gravity should be at their intersection. Each individual accelerometer ...


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