Abstract: A spread spectrum radar system, characterized in that the receive radar signal is mixed down to baseband and applied to leak cancellation means for subtracting therefrom an attenuated delayed version of the transmit radar signal to provide a reflected receive radar signal with improved signal-to-noise ratio for further processing and to prevent receiver saturation. The radar allows the capture of the range and speed of identified targets, and facilitates a determination of the target's direction. It exhibits an inherent immunity to electromagnetic interference, and is relatively undetectable by radar detectors. The system is easily reprogrammable for different range resolutions and permits Doppler processing to be independent of the angle between radar signal and the track of the target.

Abstract: A spread spectrum radar system, characterized in that the receive radar signal is mixed down to baseband and applied to leak cancellation means for subtracting therefrom an attenuated delayed version of the transmit radar signal to provide a reflected receive radar signal with improved signal-to-noise ratio for further processing and to prevent receiver saturation. The radar allows the capture of the range and speed of identified targets, and facilitates .a determination of the target's direction. It exhibits an inherent immunity to electromagnetic interference, and is relatively undetectable by radar detectors. The system is easily reprogrammable for different range resolutions and permits Doppler processing to be independent of the angle between radar signal and the track of the target.

Abstract: The invention relates to a status display system for aircraft which system receives signals from sensors/transducers monitoring a plurality of parameters and subsystems of the aircraft. The system then displays text identifying faulty ones of the parameters or subsystems in a prioritized sequence. With the system of the invention, only a single indicator is needed to identify a plurality of faults as compared to available systems wherein each parameter and subsystem is monitored by a separate device including a separate display. Thus, the present invention is an improvement over the prior art in that: (1) it requires less cockpit space for displaying faults, and; it presents faults in order of priority so that the pilot does not have to make decisions about the most important fault to attend to when, as in the prior art systems, faced with a plurality of fault indications on a plurality of fault indicators.

Abstract: Present parameter value indicators are wasteful of space and expense and have parallax error if viewed at an angle. This invention is a vertical strip bargraph comprising separately illuminated squares of different colors to indicate values of the parameter without parallax error and economical of space and expense.