Award Data

Metalenses, with their ability to arbitrarily control the amplitude and phase of light across a band of wavelengths, have the potential to disrupt imaging and communication systems which rely on traditional lenses to focus, collimate, and otherwise manipulate optical signals, and are under increasing pressure to operate with reduced size and weight. We propose to design, develop, and demonstrate a ...

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THIS PROPOSAL DESCRIBES A NOVEL METHOD FOR TARGETING NOISY, HIGH-VALUE TARGETS SUCH AS ENEMY ARTILLERY, HELICOPTERS AND, PERHAPS, HEAVY VEHICLES AND GENERATORS. THE CONCEPT MAKES USE OF RELATIVELY INEXPENSIVE ACOUSTIC SENSORS WHICH CAN BE DEPLOYED IN ENEMY TERRITORY BY AIR DROP OR BY ARTILLERY. THE SYSTEM LOCATES TARGETS BY CORRELATING THE ACOUSTIC SIGNALS RECEIVED BY SEVERAL PAIRS OF SENSORS TO D ...

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ACCURATE MEASUREMENTS OF AIR-FILLED POROSITY (AFP) AT DEPTHS IN THE RANGE 200-1000 M ARE REQUIRED TO PRECISELY DETERMINE THE SEISMIC MAGNITUDE OF UNDERGROUND NUCLEAR TESTS. A PROGRAM IS PROPOSED TO: (1) SPECIFY AN APPROACH, USING ONE OR MORE DIAGNOSTICS, FOR MEASURING AFP TO AN ACCURACY OF ONE POROSITY UNIT (1 PU) AND (2) TO DEVELOP A FORMATION DENSITY/LITHOLOGY LOGGING TOOL WHICH WILL FORM A KEY ...

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RECENT RESEARCH HAS INDICATED THE POTENTIAL BENEFITS OF AEROASSISTED ORBITAL TRANSFER MANEUVERS FOR REALIZING SIGNIFICANT FUEL SAVING OVER PURELY PROPULSIVE MANEUVERS FOR BOTH COPLANAR AND PLANAR TRANSFER USING APPROXIMATE CLOSED-LOOP GUIDANCE LAWS AND/OR NUMERICAL OPTIMIZATION ALGORITHMS. THIS RESEARCH HAS FOCUSED ON CURRENTLY ENVISAGED TRANSATMOSPHERIC VEHICLES. BASIC RESEARCH IS NEEDED TO INVES ...

A SIMPLE, HIGH SPECIFIC IMPULSE ELECTRIC PROPULSION THRUSTER IS PROPOSED FOR APPLICATION TO SMALL SATELLITES. THIS THRUSTER USES AN ELECTROSTATIC PLASMA ACCELERATION (EPA) PRINCIPLE TO ACHIEVE PROJECTED SPECIFIC IMPULSE LEVELS OF ORDER 1,000 SEC. KEY FEATURES OF THE EPA THRUSTER CONCEPT INCLUDE THE ABILITY TO OPERATE DIRECTLY OFF THE SPACECRAFT BUS, WITH LITTLE OR NO POWER CONDITIONING, AND THE CA ...

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