Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 54 for “"transponder"”.
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The design of a deep space transponder regenerative ranging unit
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering, 1995.
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Virtual long baseline (VLBL) autonomous underwater vehicle navigation using a single transponder
… underwater navigation using a single location transponder would provide dramatic time and cost savings for underwater vehicle operations. This thesis presents a simulation of autonomous underwater vehicle navigation using a single transponder to create a virtual long baseline (VLBL). Similarly …
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Single Transponder Range Only Navigation Geometry (STRONG) applied to REMUS autonomous under water vehicles
… the concept of an iterative approach to single transponder navigation for REMUS Autonomous Underwater Vehicles (AUVs). Although the concept of navigation with one acoustic beacon is not new, the objective was to develop a computer algorithm that could eventually be integrated into the REMUS …
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Single Transponder Range Only Navigation Geometry (STRONG) applied to REMUS autonomous under water vehicles
… the concept of an iterative approach to single transponder navigation for REMUS Autonomous Underwater Vehicles (AUVs). Although the concept of navigation with one acoustic beacon is not new, the objective was to develop a computer algorithm that could eventually be integrated into the REMUS …
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Single Transponder Range Only Navigation Geometry (STRONG) applied to REMUS autonomous under water vehicles
… the concept of an iterative approach to single transponder navigation for REMUS Autonomous Underwater Vehicles (AUVs). Although the concept of navigation with one acoustic beacon is not new, the objective was to develop a computer algorithm that could eventually be integrated into the REMUS …
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In-orbit testing of satellite TWTA's without commercial traffic interference
… element of a communications satellite transponder. Satellite operators rely on spare ‘TWTAs to ensure that most of the transponders will be operating at the spacecraft end·of-life. We wish to track the °health° of the operating TWTAs in order to accurately predict the remaining useful …
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Design and Implementation of a Secondary Surveillance Radar/Identification Friend or Foe Transceiver Card
The performance of SSR/IFF equipment, i.e. the transponder or the interrogator, can be tested by means of an SSR/IFF test set, which is usually extremely expensive, hard to transport and requires end-user certificates. This dissertation thus focuses on the design and implementation of a short-range …
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Studio e sviluppo di sistemi RFID in banda UHF
… some relevant properties and trade-offs in transponder and reader design. Moreover a new low cost approach to extend the read range of the RFID UHF passive systems will be discussed. Within the scope to check the reliability of the analysis approaches and of innovative proposals, some …
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Systematic characterization and calibration of a three dimensional ultrasonic positioning system for use in mobile robots
… an experiment was conducted to locate a still transponder in the air using three transmitters on the ground. Due to the angular range of the transponder and the transmitters, data were not logged all of the time. An approximate lower z limit boundary surface was calculated, which predicted the …
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An educational VSAT system for Thailand
… system availability, VSAT antenna size and transponder power utilization in an educational VSAT system using Ku-band. Demand assignment multiple access (DAMA) and single channel per carrier (SCPC) transmission techniques work well for multiple access purposes and minimizes the cost of the …
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Empirical approaches to the conservation of Margaritifera Margaritifera
… and attaching Passive Integrated Transponder tag to captive-bred freshwater mussels used in translocation studies may incur energetic costs through reduced short term activity and the increased effort required to re-burrow into the substrate<br/>Captive-bred Freshwater pearl …
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Size-Dependent Earth Impactor Warning Times And Corresponding Campaign Mission Recommendations
… of observation technology and use of a precursor transponder implantation mission. </p> <p> An interdisciplinary approach is taken to measure the success of the Spaceguard efforts in increasing the warning times for approaches of variously sized bodies. A multi-step method is developed, beginning …
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A preliminary investigation into effects of flipper banding on African penguins spheniscus demersus
… of 100 individuals injected with a subcutaneous transponder only, and 100 that have both transponders and a stainless steel flipper band.
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A parallel hypothesis method of autonomous underwater vehicle navigation
… measurements between a vehicle and an external transponder and uses them in real-time to augment the navigation algorithm during periods when direct-path time-of-flight measurements are not available. A proof of concept was conducted using real-world data obtained by the Woods Hole Oceanographic …
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Low Power Demodulator Design for RFID Applications
… common. A low power demodulator, part of a RFID transponder operating in the 900 MHz range, is presented using sub-threshold design. Using this technique and working with 90 nm complementary metal-oxide-semiconductor (CMOS) technology, the circuit can operate with a supply voltage as low as 0.3 …
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Antena da banda Ku (60cm) com emprego na banda C
… em satélite na banda C; análise espectral de transponder de satélite; recepção de canal aberto
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Performance analysis of VSAT networks
… interference losses and satellite transponder effects, and it includes these losses in a performance analysis of 50 channel full mesh and star network architectures. It demonstrates selection of operating conditions producing optimum performance.
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Performance evaluation of nonlinear satellite link by computer simulation
… of a transmit earth station, a satellite transponder, and a receiving earth station. All the signals used in the simulation procedure are real-valued and are transformed back and forth between time and frequency domains depending on the necessity by the Fast Fourier Transform (FFT) or …
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Evaluation of Brook Trout (Salvelinus fontinalis) Introductions and Re-introductions Into Four Virginia Blue Ridge Mountain Streams
… received a Biomark® 134.2 kHz passive integrated transponder (PIT) tag to identify individual fish upon recapture. Trout were present in all streams almost three years post introductions. Catches decreased across the first four surveys. Young of year catch rates severely decreased from June 2009 …
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Jacking in Chinook salmon (Oncorhynchus tshawytscha ): environmental and genotypic effects on life history strategy
… mechanisms remain unclear. Passive integrated transponder tagged fish were followed through fresh and salt water growth to the sexual maturation of the jacks. Growth data was recorded to examine the relationship between size/growth effects in freshwater rearing on subsequent precocious sexual …
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