by 90 u00b0 via the adaptive threshold value switch 8 which has the same switching threshold as the threshold value switch 7 the time reference signal 30 is obtained by means of adding the two roll signals 26 and 27 in the mixer amplifier 6 and is fed to the memory 9 as a time signal 31 via the adaptive threshold value switch 11 at the same time the time reference signal 30 is guided via the analog digital converter 10 and then serves the computer 4 as information 36 on the respective available signal amplitude of 30 the time signal 31 triggers the free running oscillator 12 of the counter 13 whose counter state 37 is likewise processed in the memory 9 the oscillator 12 is constructed here for example as a simple free running and shock resistant rc oscillator whose accuracy is sufficiently great to ensure a favorable tracking by means of the computer 4 even during a brief outage of the synchronization by means of the time signal 31 the maximum determination unit 3 evaluates the output signals 21 22 23 24 of the four quadrant detector 1 and uses the roll signals 26 and 27 as reference values the output signal 25 transmits the definite roll attitude of the missile to the computer 4 which calculates the necessary course corrections by means of all the available data and relays them to the control members of the missile via the line 35 the adaptive threshold value switches are also controlled from the computer 4 via the lines 32 33 34 fig2 shows the amplitude curve.