Award Data

CURRENT STUDIES CONCENTRATE ON GLOBAL POSITIONING SYSTEM (GPS) AS A SPACECRAFT ATTITUDE DETERMINATION TOOL. TWO GPS ANTENNAS RECEIVING THE SAME SIGNAL CAN COMPARE THEIR RELATIVE PHASES TO DETERMINE THE ANGLE BETWEEN THE TWO ANTENNAS AND THE GPS SATELLITE. BY COMPUTING THE ANGLE TO THREE OR MORE SATELLITES, THE COMPLETE INERTIAL ORIENTATION MAY BE DETERMINED. APPLYING ADVANCES IN GPS INTERFEROMETRY ...

THE USE OF MULTIPLE SENSORS FOR ELECTRONIC SIGNAL UNDERSTANDING HAS IMPORTANT ADVANTAGES. MULTIPLE VIEWING ANGLES CAN PROVIDE MULTIPLE DIRECTION FINDING, MULTIPLE DOPPLER MEASUREMENTS FOR TARGET VELOCITY DETERMINATION, ROBUSTNESS AGAINST TERRAIN MASKING/SPOOFING, ETC. ALTHOUGH THE DATA FROM MULTIPLE SENSORS CAN BE SENT TO A CENTRAL SITE FOR PROCESSING, A DISTRIBUTED ELECTRONIC SIGNAL UNDERSTANDING ...

THE TREND CONTINUES TOWARDS APPLYING ADVANCED COMPOSITE MATERIALS TO THE HIGH PERFORMANCE STRUCTURES ASSOCIATED WITH AEROSPACE. STRUCTURES FABRICATED FROM CARBON-CARBON AND FILAMENT WOUND COMPOSITES ARE PARTICULAR EXAMPLES. TO FULLY EXPLOIT THE PROMISE OF THESE ADVANCED STRUCTURES, NOVEL NDE TECHNIQUES ARE NEEDED FOR CHARACTERIZATION. DUAL-ENERGY LAMINOGRAPHY SPECIFICALLY ADDRESSES THE CHEMICAL, D ...

THE COMPUTATIONALLY INTENSE NATURE OF BLADE ELEMENT ROTORCRAFT MATH MODELS HAS LIMITED THEIR USE IN REAL-TIME SIMULATIONS TO LARGE MAINFRAME COMPUTERS OR SPECIAL PURPOSE COMPUTER SYSTEMS. BLADE ELEMENT MODELS ARE, HOWEVER, NECESSARY TO ACCURATELY REPRODUCE THE ROTORCRAFT RESPONSE DURING COMPLEX MANUEVERS, SUCH AS THOSE REQUIRED FOR COMBAT. THE RECENTLY RELEASED DEC MICROVAX II COMPUTER HAS THE CAP ...

MEASUREMENT OF WIND AND TURBULENCE BY REMOTE SENSING TO A HEIGHT OF AT LEAST ONE KILOMETER ABOVE GROUND LEVEL HAS BECOME WELL ESTABLISHED. SUCH SYSTEMS ARE KNOWN AS DOPPLER ACOUSTIC SOUNDING SYSTEMS (DASS) OR SOUND DETECTION AND RANGING (SODAR). THESE SYSTEMS UTILIZE SOUND AT RELATIVELY LOW FREQUENCIES - 1200 TO 2000 HZ. RECENT EXPERIMENTAL WORK HAS SHOWN THAT THE "MINI-SODAR" HAS GREAT POTENTIAL ...

DISPERSING SONAR BUOYS OVER A TWO-DIMENSIONAL OCEAN AREA WOULD BE FACILITATED IF SOME OF THE BUOYS WOULD GLIDE PERPENDICULAR TO THE FLIGHT PATH OF THE DISPENSING AIRPLANE. TO DEVELOP THE TECHNOLOGY FOR THIS LATERAL FLIGHT, A PROGRAM IS PROPOSED WHICH, AFTER OUR INTER-ACTIONS WITH THE SPONSOR ON PATTERN SHAPE AND ACCURACY REQUIREMENTS, 1) EXPLORES VARIOUS CONFIGURATION CHANGES WHICH WOULD PROVIDE A ...

THE PHASE I RESEARCH PROPOSED HEREIN ADDRESSES THE NEED TO DETERMINE THE OPTIMUM PLACEMENT OF MILD DETONATION CORD ON AIRCRAFT CANOPIES TO ENSURE THAT DURING EJECTION THE CANOPIES WILL DISINTEGRATE INTO PIECES THAT DO NOT INFLICT INJURY ON THE ESCAPING PILOT. THE PROPOSED APPROACH UTILIZES FINITE ELEMENT METHODOLOGY IN COMBINATION WITH RECENTLY DEVELOPED TWO-DIMENSIONAL CRACK-TIP ELEMENTS OF SUPER ...

THIS PROPOSAL PROVIDES AN INNOVATIVE APPROACH TO COUNTERING PARAMETER AGILE RADAR SYSTEMS USING A UNIQUE METHOD FOR SIGNAL TRACKING AND A KNOWLEDGE BASED SIGNAL FUNCTION RECOGNITION SYSTEM.

TO ACHIEVE THE PROGRAM GOALS OF ULTIMATELY FABRICATING AND DEMONSTRATING MINIATURIZED BROADBAND, HR/VHF ANTENNAS FOR USE ON AIR FORCE VEHICLES, THE TWO CRITICAL TECHNICAL ASPECTS OF THE PROBLEM, FORESHORTENING AND BROADBANDING, HAVE BEEN STUDIED, PROTOTYPE CONCEPTS DEVELOPED, AND ENGINEERIN FEASIBILITY ASSESSED IN AN EXTENSIVE PHASE I PROGRAM UNDERTAKEN BY ASTRON. REALIZATION OF THESE CONCEPTSREQU ...

MONOCRYSTALLINE SUBSTRATE OF CDZNTE (4 AT% ZN), NOMINALLY LATTICE MATCHED TO HGCDTE (20 AT% CD), WILL BE PREPARED FROM CRYSTALS GROWN BY A NEW PROCESS. THE NEW CRYSTAL GROWTH SYSTEM IS FREE OF QUARTZ AND PROVIDES IMPROVED GROWTH CONDITIONS THROUGH 1) TEMPERATURE PROFILING AND PRESSURE CONTROL TECHNIQUES THAT CANNOT BE USED IN CONVENTIONAL GROWTH SYSTEMS BECAUSE OF TEMPERATURE AND PRESSURE LIMITATI ...