Abstract: Using in-phase and quadrature components of a received signal, spatial and temporal information is utilized to generate a maximum likelihood coefficient from the measured data to geolocate an emitter of unknown frequency. In one embodiment an iso-Doppler contour is generated having regions of high correlation to estimate location in which the maximum likelihood calculation uses two factors, one derived from a single aperture and one derived from bearing estimates, with the region of highest correlation corresponding to emitter location. Hypothesized in-phase and quadrature signals corresponding to an emitter location describe what the signals received at the aperture should be if the emitter is of a predetermined frequency and at a predetermined location, with these estimates used in the maximum likelihood algorithm.

Abstract: Using in-phase and quadrature components of a received signal, spatial and temporal information is utilized to generate a maximum likelihood coefficient from the measured data to geolocate an emitter of unknown frequency. In one embodiment an iso-Doppler contour is generated having regions of high correlation to estimate location in which the maximum likelihood calculation uses two factors, one derived from a single aperture and one derived from bearing estimates, with the region of highest correlation corresponding to emitter location. Hypothesized in-phase and quadrature signals corresponding to an emitter location describe what the signals received at the aperture should be if the emitter is of a predetermined frequency and at a predetermined location, with these estimates used in the maximum likelihood algorithm.

Abstract: An antenna and its associated components are consolidated in a small measurement box, and multiple tests are competed simultaneously, with a single vector network analyzer. This can be done by treating the “Far Field” measurements (typically measured on antenna/RCS ranges) as another port of a larger passive network. After characterization of one ideal “gold” unit (or a sample set of “gold” units), the S-parameters of subsequent units are measured in the same passive test box environment. The results of these subsequent tests are compared to the results of the “gold unit's” test, and if they are repeated to within some tolerance, electrical similarity can be proven.

Abstract: An RF absorber system (26) for absorbing RF energy in the payload chamber (20) of a launch vehicle is disclosed. The RF absorber system (26) includes a plurality of panels (27) for providing acoustic absorption and for housing RF absorbing material. The panels (27) comprise a plurality of acoustic absorbing layers (30a, 30b, and 30c) and at least two RF energy absorbing sheets (36a and 36b) for absorbing RF energy, and an outer film layer (38) for dissipating static charges and acting as a contaminant barrier. The panels (27) have an outer surface (32) and an inner surface (34). The RF energy absorbing sheets (36a and 36b) are sandwiched between the plurality of acoustic absorbing layers (30a, 30b, and 30c), thus creating alternating acoustic absorbing layers and RF energy absorbing sheets. The outer film layer (38) is secured to the outer surface (32) of the panel (27).

Abstract: A glide slope antenna for receiving information transmitted from the ground, including elevation guidance for the final approach. The glide slope antenna is integrated with the aft nose wheel well door and utilizes the inherent electrical properties associated with the graphite/epoxy composite door.

Abstract: An intrusion detection system that comprises a transmission line for RF energy, a transmitter coupled to one end of the transmission line to supply pulses of RF energy into the line, and a range gated doppler receiver for receiving RF energy from the other end of the transmission line. The receiver includes means for producing a detection signal indicating the presence of doppler components in a range gated portion of the RF energy received from the transmission line.

Abstract: Methods and apparatus for electronically steering a radio frequency signal beam (RF) along at least one of "X" and/or "Y" coordinates with respect to the axis of the signal beam (RF) and comprising n pairs of back-to-back prisms (20, 21) formed of ferroelectric dielectric material such, for example, as BaTiO.sub.3, LiNbO.sub.3, LiTaO.sub.3, Bi.sub.12 SiO.sub.20 (BSO) and Bi.sub.12 GeO.sub.

Abstract: Methods and apparatus are provided for the enzymatic production of ethanol from fermentable sugars. A complete sequence of enzymes for catalyzing the conversion of fermentable sugars to ethanol is retained in a plurality of reaction zones. Fermentable sugar solution is sequentially passed through the zones, and ethanol is recovered from the last zone. Necessary coenzymes and cofactors are added to the solution in the various zones, and means are provided for recovering and, if necessary, modifying the coenzymes prior to reintroduction in the various zones.

Abstract: Electrical power at microwave frequencies produced by solar cells or similar devices on satellite stations in space is phase modulated prior to its being beamed to earth. At the receiving station on earth, the power in the beamed signal is recovered at the modulation frequency. In the first embodiment, the microwave signal from the power originating device drives a circularly polarized antenna; the modulation is achieved by reversing the phase of the drive signals so that the polarization of the propagated wave alternates between right hand and left hand polarization at a 360 Hertz rate. On earth, the detected outputs of the receiving antennas are combined in such a manner to produce a 60 Hertz three phase power signal. In the second embodiment, the microwave signal drives two orthogonal, linearly polarized antennas; the modulation is achieved by gradually changing the phase of the microwave drive signals so that the polarization of the propagated wave rotates at a 60 Hertz rate.

Abstract: The bolt of a latching mechanism is spring actuated toward a latching position relative to the latch-receptive slot of a latch-catch which is pivotally mounted on the vertical member of a swing gate, and movement of the bolt from a fully latched position to a retracted non-latching position is controlled by a pendulum stop which is normally and gravitationally disposed in interfering relationship with the bolt, whereby an intentional, deliberate, pendulum-stop-displacing action is required on the part of an attendant in order to enable the bolt to be shifted from an advanced, locked position to a retracted position.

Abstract: Concentric driving and driven clutch rings have teeth in a common radial plane on one end of the rings. The clutch rings are normally coupled together by a coupler ring having teeth engaging the teeth of both clutch rings, this engagement being maintained by an axial clamp bolt. In the event of dangerous overspeed the clamp bolt is broken and the coupler ring is disengaged from the clutch rings by an explosive charge acting on an axial piston. The explosive charge is detonated by a firing pin actuated by a steel ball impelled by centrifugal force. The ball is retained by a magnet until centrifugal force exceeds the magnetic force holding the ball.