Thread:Golurk 88/@comment-30076690-20190524055114/@comment-34517845-20191007111836

It knows this because it know where it isn't. By subtracting where it is from where it isn't or from where it isn't from where it is, whichever is greater, it obtains a difference or deviation. The guidance subsystem uses deviations to generate corrective commands to drive the missle from a position where it is to a position where it isnt and arriving at a position where it wasn't it now is. Consequently, the position where it is, is now the position that it wasn't and it follows that the position that it was is now the position that it isnt. In the event that the position that it is in, is not the position that it wasn't, the system has acquired a variation. The variation being the difference between where the missle is and where it isn't. If variation is considered to be significant factor, it too may be corrected by the GEA. However, the missle must also know where it was. The missle guidance computer scenario works as follows, because a variation has modified some of the information the missle has obtained, it is not sure just where it is, however it is sure where it isnt within reason and it knows where it was. It now subtracts where it should be from where it wasn't or vice versa. And by differentiating this from the algebraic sum of where it shouldn't and where it was, it is able to obtain the deviation and its varation which is called error.