Abstract: A thermoelectric apparatus for adjusting the shape or position of a mirror y application of pressure from a device which changes dimensionally with changes in temperature. The device is a metallic or non-metallic generally tubular member having a heat pump mounted thereon which in turn has a thermal connection to a controllable heat source. A temperature sensor is also mounted on the device and both the temperature sensor and the heat pump are electrically connected to a controller.

Abstract: A circuit for generating a noise signal for use in a jet engine noise simtor which utilizes two component pseudo-random noise (PSN) generators and a combination field effect transistor (FET) and resistor circuit to which the outputs of the PSN generators are connected such that the signal from one PSN generator is modulated by the signal from the other PSN generator.

Abstract: A method for coating a surface comprises providing an electrostatically charged powder, irradiating the powder with energy until the powder or the surface melts, and allowing the surface to solidify.

Abstract: A satellite method for measuring sea surface temperature uses simultaneous overage by two satellites in the same spectral window plus a simplified atmospheric radiative transfer model. A geostationary satellite and any polar orbiting satellite provide nearly coincident infrared imagery of a given area with points of equal and unequal observation angles. The calibration curve of the data for one satellite is adjusted to match the temperatures of the better calibrated satellite data along the equal angle points. A difference image is obtained from the resulting two satellite temperature images. The difference image together with the two observation angles and the temperature of the more accurate satellite radiometer are input to a suitable atmospheric model to obtain sea surface temperature at each point in the study area. The result is an accurate sea surface temperature for each point within a given area which is corrected for a spatially variant atmosphere.

Abstract: A remote transmitter system including a control station and a remote trantter station. The control station includes a variable frequency oscillator, a modulator, a parallel to series digital data converter and a DC power supply. The remote transmitter station comprises a power storage circuit, a phase-locked-loop demodulator, a local oscillator, a modulator and a power amplifier. The variable frequency oscillator provides two signals f.sub.o and f.sub.1 that are harmonics of each other and are in-phase. These signals modulate the 0's and 1's of digital data that is transmitted along a coaxial cable to the phase-locked-loop demodulator that provides a control signal to the local oscillator and the modulated digital data signal (f.sub.o, f.sub.1) to the modulator. The local oscillator generates two signals f.sub.A and f.sub.B, that have a predetermined phase and/or frequency relationship to f.sub.o and f.sub.1. The f.sub.o and f.sub.1 signals are detected and applied to the modulator as a control signal (D.sub.

Abstract: A microstrip antenna having approximately an octave bandwidth comprises a planar radiating element disposed approximately coplanar with and in front of an upper ground plane and spaced above a lower ground plane at a distance equal to approximately one-tenth wavelength at the lowest operating frequency (one-quarter wavelength at the upper operating frequency). A thin dielectric layer is disposed on top of the upper ground plane which is coupled to the lower ground plane. The antenna, which is linearly polarized, is fed from the rear by a launcher that is approximately coplanar with the radiating element and mounted above the dielectric layer. Impedance matching means are provided for improved performance.

Abstract: An antenna structure in which two or more microstrip arrays are disposed on op of each other to minimize the required space. The shape of the microstrip elements and the polarization thereof are chosen so that the individual elements radiate only in specific areas along the edges of the elements with the remainder of the element having no appreciable electric field concentration. Because of the operating frequency of a microstrip element is a function of the size of the element, a second antenna of smaller higher-frequency elements may be disposed over a larger lower-frequency antenna such that the higher frequency antenna does not cover the areas of the lower antenna that radiate but lies over only those areas having no appreciable electric fields concentrations. Increasingly higher-frequency antennas can be placed on top of the lower-frequency antennas if the foregoing conditions are maintained with respect to all of the covered antennas.

Abstract: A method of obtaining a long-lived flashpumped laser dye with an output equivalent to commercial dyes and a low threshold of lasing using the N-methyl tosylate salt of 2-(4-pyridyl)-5-(4-methoxyphenyl) oxazole.

Abstract: An improved method for continuously determining the orientation of a moving ser platform at a selected time fix. A Global Positioning System (GPS) is used to carry out the method and is made up of a plurality of twenty-four (24) earth-orbiting satellites wherein each satellite continuously transmits a pair of distinctively encoded RF signals. The GPS system is also provided with a computerized GPS receiver apparatus for use on a moving platform. The receiver apparatus is generally comprised of a rotatable antenna, a single channel multi-track geodetic receiver, a receiver microprocessor, and an orientation computer with a display. The receiver processor selects an optimum group of four satellites to be tracked. The orientation computer during antenna rotation selects a series of four equidistant points about the antenna periphery for receiving signals from each tracked satellite.

Abstract: Visible and ultraviolet lasers is based on excimer transitions in the diatomic homonuclear halogen molecules. Electron beam pumping of argon and hydrogen iodide gas mixtures produces a strong green emission in I.sub.2 centered at 505 nm and a full width of half maximum (FWHM) of the gain spectrum of approximately 15 nm. The transition for the green I.sub.2 band is bound-to-free, so a laser on this transition is continuously tunable. The result is a room temperature excimer laser that is potentially tunable over a region of 150 .ANG. in the blue-green.

Abstract: In a thrust vector control system of the type in which a solid-propellant s generator powers a turbine-driven pump for driving hydraulic actuators for controlling the direction of thrust, the improvement being a feed back control system in which a variable-area gas valve is disposed inline between the gas generator and the turbine. The turbine speed is fed back to an electronic controller where it is compared with a commanded turbine speed. The controller applies forward-loop compensation to provide a signal that adjusts the area of the gas valve to control the operating pressure of the gas generator to drive the turbine speed to the commanded value.

Abstract: A hybrid connector is presented whereby both electrical and fiber optic cables are connected to a printed circuit card. The connector consists of a female half which contains a plurality of fiber optic contact inserts molded into the connector, and also female electrical connections. The male half of the connector is an integral part of a printed circuit card constructed to contain male fiber optical contact inserts in addition to the standard plated electrical male type contact points. Both halves of the connector may be fitted with removable and interchangeable fiber optic contacts, radio frequency contacts, and/or power pins in addition to the standard printed circuit car contacts for wire wrap or solder connections. The printed circuit card hybrid fiber optic connector presented here provides normal card installation and removal of fiber optic interconnects from standard card cages or mother boards without threading or other special engaging mechanisms.

Abstract: A method for detecting faults in a synthetic electro-mechanical cable uses n insulated conductor dipped in a slurry of graphite prior to being overbraided with the synthetic reinforcement material. Enough graphite oozes through the braid to insure a conductive path through the multiple layers of cable on a metal take-up reel to megger the finished cable between the conductor and the metal reel.

Abstract: An improved rifle-actuated rocket weapon system and an improved method for iming the system in relation to a short range target by firing one or more tracer bullets until it is aimed at the target for launching the rocket weapon. The system is generally made up of a spotting rifle and a rocket weapon launch tube subassembly. The rifle is provided with a magazine for carrying one or more tracer bullets. Fluid passageway means are provided in the launch tube subassembly, rocket weapon fuse device, and rifle. Interconnection of the passageway means with the bullet accelerating and guiding passageway of the rifle is effected by a manually operated normally closed valve. The valve is disposed in the rifle and is operatively associated with the passageway means.

Abstract: The improved electrooptic signal processing relies upon matrix-matrix multiplication using twos complement arithmetic. A source of pulse collimated light illuminates two two-dimension spatial light modulators that operate in a reflective mode through a polarizing beamsplitter. Each of the spatial light modulators has a matrix of optically encoded information of numbers in the twos complement binary representation so that a mixed binary representation of signals is generated within the two-dimensioned photodetector array. The mixed binary representation signals are decoded to a twos complement binary representation or a decimal representation to be useful for more conventional processing techniques. The twos complement arithmetic when incorporated with the electrooptic architecture provides for a convenient means for handling bipolar numbers, avoids the need for matrix partitioning when the matrices are real and offers a means to improve accuracy over conventional optical analog techniques.

Abstract: A time sequence of square waves is summed to provide minimum distortion h power voltage sinusoids. The phase difference of two identical sinusoids is varied to control the resultant summed amplitude. Amplitude modulation of the sum sinusoid is achieved through varying the phase relationship between the two identical sinusoids. Frequency and phase modulation is achieved through digital control of the individual square waves.

Abstract: A method and apparatus for broadcasting, transferring and disbursing infotion from space to earth uses sunlight as the carrier. An orbiting platform receives sunlight and modulates it with electromagnetic signals carrying the information beamed up from an earth station, communications satellite or aircraft. The modulated sunlight is directed to a designated area on earth from the orbiting platform where it penetrates clouds as well as seawater to reach surface and submerged receiving stations including submarines.

Abstract: A fault tree data array converts the logic of a fault tree into software by sing a data base technique. Each array element of a data array contains a decision or termination of the fault tree, and a relative exponential addressing expression provides the data elements with a unique position in the array. The next position in the data array to be examined is calculated by the relative exponential addressing expressions. For unsymmetrical fault trees on additional data array is generated to provide a sequential list of tests to be examined until a fault is found. Then the relative exponential addressing technique is used. The result is a more compact method of storing data in computer memory, hence providing an efficient method for implementing fault trees into software.

Abstract: A method is disclosed for determining characteristics of semi-insulating lium arsenide that can be used to evaluate the suitability of the material for semiconductor processing. An n-channel test device formed on a substrate of semi-insulating gallium arsenide is illuminated with pulses of light. The decay in the photoconductance that occurs due to the illumination is measured in order to enable characterization of the shallow acceptor impurities which compensate the deep donors in the semi-insulating gallium arsenide.

Abstract: The launch mode for a cruise missile utilizes a solid propellant booster ket to propel the missile from the launch platform to a speed and altitude sufficient to enable the missile to transition to the cruise flight mode. Immediately following booster burnout the missile jettisons the booster and transitions to cruise flight by deploying aerodynamic lifting surfaces and starting its cruise engine. The shaped trajectory launch mode significantly reduces the required booster motor impulse by deploying the cruise missile wings during boost flight. The aerodynamic wing lift enables the missile to fly a flatter trajectory reducing performance lost in climb and results in higher booster burnout velocity and significant improvement in launch performance.