Abstract: Advanced boresight equipment and methods of using the same to effect a transfer of a two- or three-dimensional frame of reference from an ADL to a device to be boresighted.The equipment includes a stationary inertial sensor that is boresighted with respect to a reference line (such as the aircraft ADL). The stationary inertial sensor includes a first gyroscopic combination for generating a first output indicating a two- or three-dimensional frame of reference based on the ADL, and a docking station. The docking station facilitates alignment of a portable inertial sensor that also has a gyroscopic combination for generating a second output indicating its frame of reference.

Abstract: A frequency band filtering circuit and phase shift free crossover network comprising at each crossover frequency range between band pass filters a low-pass filter means characterized by a transfer function that decays at a second or higher order function of frequency and a high-pass filter means characterized by a transfer function that rises as a second or higher order function of frequency and wherein the respective pair of transfer functions sum to unity. By employing circuit filters characterized by high order polynomial transfer functions that sum to unity, the combination of sharp roll-off and excellent frequency separation is achieved without introducing phase distortion when the signals are recombined or summed.

Abstract: In an airborne target acquisition and tracking system having a stabilization axis and an optical axis in which a slight mechanical misalignment is present, an apparatus and method for electronically compensating for such misalignment. A roll rate sensing circuit in the system produces a signal when the aircraft rolls. A yaw scaling factor circuit and a pitch scaling factor circuit operate on the roll rate signal and apply scaled versions thereof to the yaw rate servo subsystem and the pitch rate servo subsystem respectively to cancel a yaw rate error signal and a pitch rate error signal produced by the mechanical misalignment. The required scale factors are automatically adjusted by use of a calibrate mode by microprocessors that calculate the ratio of yaw and pitch error signals, generated by artifically rolling the system, to the roll rate signal also generated. The measured ratios are stored in non-volatile memories functioning when the system is in the operate mode.

Abstract: A weapons simulator for training an operator in the use of a weapons system, particularly a guided missile system of the type employing operator positionable optics. The operator centers a target, having two optically detectable markers, within a predetermined field of view which is viewed through the optics. A television camera in optical communication with the optics scans the field of view and generates a first video signal representing an image including the target and the markers. The markers are detected in the video signal to generate a target signal representing the position of the target in the scanning pattern of the camera and a range signal representing the range between the simulator and the target. The operator initiates simulated flight of a missile, and an electronically generated missile signal simulates the flight of a missile.