f is calculated and the obtained signal is output as the antenna tracking controller signal g concretely describing simply supposing that the antenna directing angle error signal a is a and the movable body azimuth angle error calculation signal f is f the antenna tracking controller signal g becomes a signal generated by the equation mg nh m n it is to be noted that m and n are weighting constants for each signal these values of the constants are decided by practical adjustment as a further explanation of the present invention the following is a discussion of the simulation of an actual system of the present invention fig3 is a block diagram of the present invention in the simulated system in fig3 is an antenna model 32 is a movable body azimuth angle error calculator model 33 is an adder 34 is a sampler 35 is an antenna directing angle corrector model 36 is a pi controller antenna tracking controller and 37 is an actuator model antenna driving motor the movable body azimuth angle error calculator model 32 simulates generation of the movable body azimuth angle error calculation signal f of the above mentioned embodiment the movable body azimuth angle error calculator 32 inputs the antenna directing angle j showing direction of the antenna model 31 and the target directing angle k showing direction of the target and simulates and generates the movable body azimuth angle error calculation signal f on the other hand the antenna directing angle j and the target directing angle k are input to the adder 33 and a difference between them are calculated to generate the antenna directing angle error signal a this antenna directing angle error signal a is input to the sampler 34 and a dead time is created configured as this.