Abstract: Distortions inherent in the formation of a range/doppler image by an airborne Synthetic Aperture Radar (SAR) of a ship under the influence of roll, pitch, and yaw motions characteristic of sea state conditions are removed in conjunction with a least squares linear regression solution to doppler processed interferometric azimuth angle data derived from ship radar reflections, resulting in a scaled high resolution range/doppler image representative of the true range/cross range (azimuth) distribution of the ship, so that continuous automatic tracking of a cursor imbedded in a single designated resolution cell of the ship's displayed image, essential to carrying out precision standoff command weapon guidance to that selected ship target cell, can be accomplished.

Abstract: A torque joint for transmission of force in both longitudinal and circumferential direction about thin-wall tubular torque tubes is provided by overlapping an inner one of said tubes and an outer one of said tubes, inserting a mandrel having longitudinal and circumferential slots therein, applying a deformation force for pressing the tubular members into the slots of the mandrels, and extracting at least a portion of the mandrel to provide the torque joint. In the case wherein two open-ended tubular members are employed, two mandrel elements of the same form are utilized, the two mandrel elements being withdrawn from the opposite ends of the joint upon completion of assembly of the joint. In the event that one of the tubular elements is closed ended, a retaining ring is utilized as one of the mandrel elements, in which case only one mandrel element is withdrawn while the ring remains captured between a circumferential groove of the joint and the closed end of the tube.

Abstract: A single compact multi-function video processing unit of a color video system has a sync generator for driving a video source and a video processor for providing video functions. A bus system interconnects the sync generator and video processor.

Abstract: A method for the passive measurement of the range, velocity and course of a target aircraft relative to a test aircraft includes the steps of moving the test aircraft along a straight path, varying the speed of the test aircraft, and sequentially measuring the bearing angle from the test aircraft of pulsed or continuous radiation emitted from the target aircraft. A plot of the rays of radiation at each of the times of bearing measurement produces a geometry which can be solved arithmetically to provide the lengths of the rays. These lengths correspond to the distance of the target from the test aircraft. The invention may be used with equal effectiveness against multiple targets, simultaneously.

Abstract: In an airborne radar system, moving ground targets are identified on a cathode ray tube (CRT) display and their motion tracked to allow precise delivery of air-to-ground weapons. Target location errors, due to the effect of target motion upon the doppler frequency of the received signals, and consequent angle measurement ambiguities introduced by the presence of clutter are significantly reduced. The target's radial velocity with respect to the electrical boresight of the system antenna is determined and a corresponding frequency adjustment is made to the processed signal in order to accurately locate the target on the display to lie in precise correspondence to its displayed stationary surroundings.

Abstract: A sealed heat pipe of uniform cross sectional profile from evaporator to condenser which includes a plurality of capillary channels communicating with a central channel by means of narrow re-entrant groove openings having convergent entrances. A two step method of fabrication includes extruding the re-entrant grooves, then drawing a mandrel through the virgin extrusion.

Abstract: Distortions inherent in the formation of a range/doppler image by an airborne Synthetic Aperture Radar (SAR) of a ship under the influence of roll, pitch, and yaw motions characteristic of a sea state conditions, are removed by the formation of a scaled range/azimuth image generated with the use of an interferometer antenna in conjunction wth the SAR. A least squares linear regression solution to doppler processed interferometric azimuth angle data derived from ship radar reflections permits the determination of aircraft to ship relative rotational motion essential to the development of such an improved high resolution radar image, so that continuous automatic tracking of a cursor imbedded in a single designate resolution cell of the ship's displayed image essential to carrying out precision standoff command weapon guidance to that selected ship target cell, can be accomplished.

Abstract: Capability is provided for producing 3 scaled high resolution orthogonal image projections on a CRT of a ship under the influence of translational as well as rotational motions arising from sea state conditions, for the purpose of ship target identification and classification, and the subsequent carrying out of stand-off command weapon guidance to a designated resolution cell of the ship from an airborne platform. Doppler processed interferometric azimuth and elevation angle measurements of the ship scatterers derived from a coherent synthetic aperture radar are combined in a weighted multivariate regression fit using digital signal processing techniques to provide measures of ship translational and rotational motions essential to providing focussed high resolution imagery and precision standoff weapon delivery to the designated ship target resolution cell. The invention also provides a capability for scaling the cross-range (doppler) dimension of Inverse SAR Profile Imagery.

Abstract: A variable area recording geometry is formed over the surface of a photosensitive material by scanning and exposing with an optical writing beam. The width of this area is determined by input signals to be processed. The exposed photorefractive medium results in a phase modulation of an optical beam traversing the medium in a direction parallel to the surface as in an integrated optical waveguide.

Abstract: A keyboard terminal for entering test programs written in an English-format computer programming language into computerized automatic test systems is disclosed. In response to the activation of selected user-activated keys associated with a programmable keyboard, a preprogrammed microprocessor control system generates word character strings corresponding to the words of a predetermined test programming language, thereby allowing single keystroke entry of test program words into a control computer associated with the automatic test system.