Abstract: A target detecting device which measures the range to the target and genees a variable d.c. voltage that is a function of the range. The range voltage is then applied to a time delay computer, along with range rate voltage, to permit a time delay computation which is a function of both the distance to the target and the missile-target closing velocity.

Abstract: A circuit for use in anti-radar missile seekers or radar counter-measure eivers to convert the signals received from continuous wave radars into pulse signals so that the signals may be more readily detected and can be processed in the same signal processing circuitry used against pulse radars. The received signal is mixed with a frequency swept local oscillator signal, fed to a dispersive delay line and then detected.

Abstract: A portable toxicity tester for use in the field using bioluminescent organisms consisting of a light tight container for housing the necessary flash of light detecting apparatus and the necessary signal processing circuits, digital readout and control panel. A light tight chamber is provided with a removable stirrer assembly which is the stirrer motor housing as well as the light tight cover for the chamber. With the cover removed, a vial containing the necessary inoculated bioluminescence organisms is inserted into a holder in the chamber. Part of the stirrer assembly is a paddle attached to the motor shaft that extends to near the bottom of the vial. The top of the vial holder extends beyond the outer surface of the cover to insure a light tight seal.

Abstract: A method of evaluating marine paints for their ability to inhibit growth attachment of organisms to ship bottoms, to find chemicals toxic to marine fouling organisms and to permit rapid formulation of superior anti-fouling paints, using a bioluminescent microbiological assay. The bottoms of test vials are coated with a paint solution, the paint dried, and identical aliquots of an assay medium containing Pyrocystis lunula cells are added to the tests vials and to identical (but unpainted) control vials. After a preselected settling time, the vials are agitated and their light outputs measured and compared. Any dimuition of light in the test vials, relative to the control vials, in an indication of the anti-fouling characteristics of the paints being tested.

Abstract: A microbiological assay based on bioluminesce employing the bioluminescent dinoflagellate Pyrocystis lunula. An oil well drilling fluid sample is prepared according to E. P. A. procedures to obtain a suspended particulate phase sample. An aliquot of the sample is added to a growth medium containing Pyrocystis lunula in suspension. The mixture is agitated to subject the Pyrocystis lunula to a shear stress. Light emitted as a result of the shear stress on the Pyrocystis lunula is measure and compared with a control to determine if there is diminution of light produced by the Pyrocystis lunula in the mixture. Diminution of light production is an indication of the presence of a toxic substance in the sample.

Abstract: A man portable (80 lbs) surface piercing structure which can be installed shallow water (nominally 10 ft) from a small boat without divers assistance. The structure is comprised of two separate assemblies, a mast and a foundation. The mast is joined to its foundation by a mechanical latch and release mechanism which is internal to the mast.

Abstract: A corrosion measuring device is disclosed for measuring microbiologically duced corrosion using galvanically coupled electrodes exposed in an electrolytically continuous, biologically separated environment. The device consists of two, mirror image, half-cells separated by either a 0.1-.mu.m porous cellulose acetate/cellulose nitrate membrane or a solid disc. The membrane is used when measuring total corrosion current in a chemically continuous environment while the solid disc is used when evaluating individual corrosion mechanisms in chemically isolated environment. Culture medium is pumped through inlets of the half-cells at a constant speed. One of the electrodes is inoculated with viable microorganisms which colonize the electrode surface creating a corrosion current that can be measured with a zero resistance ammeter. If a solid (Teflon) disc is used, an agar salt bridge is inserted through the utility port of each half-cell to maintain electrolytic continuity.

Abstract: A radial pipe mount has a spoked elastomeric element around the pipe with e spokes pointing outward. A circular ring retains the spoked elastomeric element and has a support leg attached to it. The cross-section of the ring is a semi-elliptic of formula 2/a.sup.2 +x.sup.2 /b.sup.2 =1.

Abstract: A light weight pile having increased load bearing capacity for being embed in the ocean floor. Two cones are welded together at their base. An opening of about one third the diameter of the base is made in the apex of each of the cones to provide an opening for a hollow pile to pass through. The double cone is attached to the pile so that it can be water jetted into the ocean floor.

Abstract: A differential charge amplifier design for a hydrophone pre-amplifier inces a calibration circuit for in situ measurement of the hydrophone/pre-amplifier gain. The hydrophone signal is input to a pair of amplifier stages which form a balanced differential input charge amplifier. The signal from the input charge amplifier is amplified by a second pre-amplifier stage and then passed to a balanced output cable driver. The calibration circuit is enabled by an external signal to inject a calibration signal into the input charge amplifier front end.

Abstract: A stable, inexpensive and easily constructed photometer consisting of a cercial intergrated photodetection assembly, complementary solid-state operational amplifiers and a solid-state power supply for use in the detection and quantification of low level light emissions from bioluminescence organisms and for the detection of the absence of bioluminescence. Means are provided for controlling the sensitivity of the system as well as providing for direct readout or intergration of the detected signals where they are intermittent.

Abstract: A radial or azmuthal non-resonant flow-through optoacoustic cell is operated without windows, completely eliminating the window background interference. The cell is constructed of an elongated tube the length of which is 34.times.10.sup.3 cm.times.1/f, where f is the light source modulating frequency and is made of conducting material which is perforated along the center one-half length with holes. A metalized sheath surrounds this center region to form a capacitor microphone.

Abstract: A capstan adaptable "V" puller fitted with a plurality of vertical staves d is positioned on a "host" capstan. The staves are adjusted to the diameter of the capstan and securely clamped in place by any suitable means. Friction is enhanced by rubber pads mounted between the contact surface of the capstan and the staves.

Abstract: Effective removal of atmospheric contamination for a sequence of satellite olor scanner ocean imagery is achieved through determination of an optimum Angstrom exponent for weighting data in a plurality of channels of different wavelengths by the method of providing a refresh plane display for data from one channel, weighting data from a selected reference channel as determined by an Angstrom exponent, interacting the weighted reference channel data with the data in the plane by subtraction therefrom to reveal atmospheric aersol bands, varying the Angstrom exponent to determine an optimum value at which the aerosol bands become transparent, and then weighting data from each of the channels by use of that optimum value.

Abstract: An arcing fault detector used the thermodynamic conditions created by an arcing fault within a vented electrical equipment enclosure to quickly activate a protective device which causes tripping of the supply circuit breaker(s). A plurality of temperature sensors are located within the enclosure near the top, and a differential pressure sensor is located in the external wall of the enclosure approximately midway between the vents to compare internal and external pressure. The intelligence from the sensors is processed by a fault protector which controls the tripping of the circuit breaker(s).

Abstract: A synchronization circuit couples a mode-locked oscillator-amplifier laser to a streak camera and Vidicon detection system. A sync signal from a mode-locker driver and a sync signal from a Nd:YAG pump laser act as basic circuit start signals. The circuit, with appropriate electronic timing delays, generates a Q-switch signal to the Nd:YAG laser to control the amplifier pump pulses to overlap with a dye laser pulse as it arrives in each stage of an optical amplifier chain.

Abstract: A pseudo-noise modulated continuous wave radar for providing foliage penetion as a means for quickly establishing perimeter surveillance of an emplacement in heavily foliaged environments. An RF signal is radiated into free space by means of a static antenna array. The return signal is received by the receiving antenna which is composed of eight-dipoles, phased to create three receive lobes. The three lobes are utilized in an amplitude monopulse technique to determine the azimuthal direction to the detected target with respect to the radar site.

Abstract: A ramjet fuel control system that provides a regulated fuel pressure of a predetermined differential between the fuel pump pressure and the inlet pressure to a metering valve. The differential regulator uses a spool valve and sleeve in which the sleeve has ports positioned to prevent hydrodynamic flow force while the sleeve metering valve spool has rectangular ports so that the metering area which is uncovered by the spool is linearly related to the stroke of the valve spool.

Abstract: An adaptable thermistor array of variable length and sensor spacing. A pllity of thermistor modules are attached at any desired interval to a braided line. Each thermistor module contains its own power source, sensor, and an acoustic telemetry transmitter to transmit the temperature related data from the module to an acoustic receiver in a buoy from which the line depends.

Abstract: A process that derives estimates of range and range-rate during the radar ack of an object, when the radar employes a linear frequency modulated waveform. FM waveforms at the radar wavelength are transmitted. The frequency of the radar echos are measured and the difference between the incoming frequency of radar echos and the local oscillator frequency is estimated. The signal is decomposed into Range and Range rate. Implementation of the decomposition device can either be a sequence of stored software or a hardwired processor.