Abstract: An adaptive imaging telescope having a linear sensor for detecting a received optical image. The system includes a choice of two electro-optic phase shifters positioned substantially at the aperture of the telescope responsive to the received optical image. The linear sensor may consist either of a pinhole detector, a transform circuit such as of the Fourier type, or a video camera with computation circuits. This system also includes circuits responsive to outputs from the linear sensor feeding the phase shifter in closed-loop arrangement.

Abstract: A video tracking system that produces voltages representative of the location of a designated target relative to the tracking axis of a transducer. An error detector unit compares the position of a target, of selected intensity contrast, to that of a tracking gate and updates the gate position to track the target. The error detector unit includes a combination of two integrators coupled in series with two or more gate circuits that are synchronized with the tracking gate. The tracking response characteristic may be selected for optimum performance with expected target profiles by variation of the relative signal gain and timing of the gate circuits.

Abstract: A system for controlling the attitude of a vehicle along three-axes is provided with a simple momentum wheel of one degree of freedom and several jets so as to enable correction of attitude error and dampen nutation action of the vehicle. The jets are controlled by means of a two channel control circuit terminating in logic gates that select the particular jet required to make the error correction. One of the channels is responsive to the polarity or sign of a voltage provided as input thereto whereas the other channel is responsive to threshold voltage levels provided to it, both channels being responsive to inputs from a low pass filter. The threshold voltage levels are adjusted by feedback correction paths provided in that particular portion of the control circuit.