The missile knows where it is at all times. air It knows this because it where isn't by subtracting is from or whichever is greater obtains a difference deviation. The guidance sub-system uses deviations to generate corrective commands drive the missile position and arriving at wasn't now is. Consequently that follows was isn't. In event of in not system has required variation. variation being difference between wasn't. If considered be significant factor too may corrected GEA. However must also know was. computance scenario works as follows: Because modified some information obtained sure just however within reason subracts should be vice versa. By differentiating algebraic sum og shouldn't able obtain deviation variation which called