Integration of GPS/INS for Maximum Velocity Accuracy

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Abstract
It is shown that weapon delivery accuracy using GPS depends more on velocity accuracy than position accuracy if jamming occurs several minutes before reaching the target. The total accuracy deteriorates very slowly the first few minutes after jamming provided the GPS and INS are integrated for maximum velocity accuracy. Also, rate-aiding of the carrier loop with INS data is shown to be practical provided proper attention is paid to attitude motion compensation, and compensation for lags in INS data as small as a millisecond.

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