Very low cost method for midcourse guidance of a type of Chinese anti-ship missile using GPS signals

It is quite expensive to use INS (Inertial Navigation System) method to make corrections for lateral deviations of midcourse trajectory of antiship missile due to gust and gyro drift. For a certain type of Chinese anti-ship missile, it is found that using GPS signals could bring down the cost by an order of magnitude. The new heading control circuit of antiship missile are shown. GPS signals were used to make corrections for the lateral deviations of mass center of the missile. The simulation results are shown.