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DEVELOPMENT OF INNOVATIVE APPROACHES TO ENHANCING THE GROUND C3 SEGMENT SURVIVABILITY OF SPACE SYSTEMS REQUIRES A METHOD FOR MODELING THE SURVIVABILITY OF THE GROUND SEGMENTS OF SUCH SYSTEMS IN ORDER TO ALLOW COMPARATIVE EVALUATION OF APPROACHES AND SELECTION OF THE MOST EFFECTIVE ONE FOR DEVELOPMENT. SPC HAS DEVELOPED A COMPUTER MODEL OF THE PHYSICAL SURVIVABILITY OF SUCH SYSTEMS. GIVEN RELEVANT ...

SENSITIVITY OF STELLAR GUIDANCE OPTICS IS LIMITED BY REFLECTION OF STRAY LIGHT INSIDE THE OPTICAL SYSTEM. IMPROVEMENT BY 50-100% OR MORE CAN BE OBTAINED WITH A BLACK COATING, DISCOVERED BY CHARLES FELDMAN AT JOHNS HOPKINS APPLIED PHYSICS LABROATORY, CONSISTING OF SUBMICROSCOPIC COLUMNS OF AMORPHOUS SILICON PRODUCED BY ETCHING THE SURFACE OF A SOLID SILICON LAYER. THE PROGRAM, WITH DR. FELDMAN AS C ...

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THIS PROPOSAL ADDRESSES ELINT\ESM SIGINAL PROCESSING RESEARCH FOR REAL-TIME DETECTION IDENTIFICATION AND LOCATION OF THREAT RADAR EMITTERS ON THE BATTLEFIELD. GIVEN THE PREDICTED FUTURE GROWTH OF PULSE DENSITIES IN THE ELECTRONIC ENVIORNMENT, AND THE PROLIFERATION OF AGILE RADARS, IT IS NECESSARY TO DEVELOP MORE SOPHISTICATED ELINT\ESM SYSTEMS. AN ARCHITECTURE IS PRESENTED FOR A COMPUTER-BASED, AD ...

A DIGITAL ENCODING SCHEME FOR THE ARCHIVAL, STORAGE, AND SUBSEQUENT TRANSMISSION OF COLOR GRAPHIC IMAGES WILL BE DEVELOPED. THIS SCHEME WILL ACCOMMODATE RAPID RESPONSE TIMES AND ALLOW FOR FUTURE IMPROVEMENTS AND MODIFICATIONS IN A WELL-DEFINED AND ECONOMIC MANNER. THE TECHNIQUE PROPOSED TO ACCOMPLISH THIS TASK IS BASED ON A PICTURE MATRIX TRANSFORMATION, WHICH IS BASED ON THE S-TRANSFORM CODING SC ...

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THERE IS AN INCREASING NEED FOR LONG RANGE (200KM) APPROXIMATELY 10 BPS RATE ACOUSTIC COMMUNICATION AT LOW BIT ERROR RATES IN THE COMMAND AND CONTROL OF ACOUSTIC SURVEILLANCE SYSTEM ELEMENTS, UNDERWATER VEHICLES AND SENSORS. SIMULATED FISH NOISE, CODED TONE AND MULTITONE CW SIGNALS HAVE BEEN USED WITH VARYING SUCCESS. ONLY THE M-ARY, MULTITONE, LONG BAND LOW FREQUENCY WAVEFORMS ARE PRACTICAL FOR L ...

AN AUTOMATIC DECISION AID, USEABLE ON A MINI/MICRO-COMPUTER WILL BE DEVELOPED TO ANALYZE CAUSES OF ACCIDENTS/MALFUNCTIONS IN U. S. AIR FORCE AIRCRAFT. THE PROTOTYPE MODEL WILL PROVIDE THE NUMBER OF OCCURRENCES OF EACH PROBLEM FOR BOTH INDIVIDUAL AIRCRAFT TYPES AND FOR THE AIR FORCE AS A WHOLE. DATA WILL BE EXTRACTED AS A FUNCTION OF DESIRED INPUT AIRCRAFT PARAMETERS, SUCH AS LOADING, MISSION, ETC. ...

AN INVESTIGATION WILL BE PERFORMED TO EVALUATE THE EFFECTIVENESS OF ESM CONCEPTS FOR ENHANCED CRUISE MISSILE SYSTEMS. THE OBJECTIVE IS TO EVALUATE THE PERFORMANCE OF VARIOUS RECEIVER AND RECOGNITION TECHNIQUES USING EMITTER SIGNAL CHARACTERISTICS, INCLUDING INTRAPULSE AND INTERPULSE. CHARACTERISTICS INCLUDE RF, FREQUENCY MODULATION ON PULSE, PHASE MODULATION ON PULSE, UNINTENTIONAL MODULATION ON P ...

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