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 169 for “"Azimuth"”.
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Azimuth Modulation of the Radar Backscatter at Near-Normal Incidence
… that the radar backscatter exhibits little or no azimuth dependence (Colton, 1989). However, recent data taken by the BYU YSCAT radar system suggests that this is not the case. At an incidence angle of 10°, the YSCAT radar data shows from a fraction of a decibel to up to 10 decibels of azimuth …
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Modeling of a gimbal azimuth drive and simulation of control techniques
A common problem in developing new gimbal products is predicting performance. At the beginning of the design stage, typically the proposal writing stage, it is critical to be able to anticipate the performance of a design, which may still be very roughly defined. Static performance metrics such as …
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VISUAL LOCALIZATION ACCURACY DETERMINES THE BIAS OF AUDITORY TARGETS IN AZIMUTH AND DEPTH
… studies have demonstrated visual bias in azimuth, but none have directly tested, or found, this effect in depth. By increasing the saliency of the auditory and visual signals from a previous experiment, the current study was able to produce more accurate depth discrimination. Visual …
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Synthetic Aperture Radar Rapid Detection of Range and Azimuth Velocities Implemented in MATLAB
… thesis is to develop techniques to determine the azimuth and range velocities of moving objects in the target space in the early stages of SAR processing. The typical SAR processing steps are Range Compressed, Range Doppler, and final image generation. The range velocity of a target can be …
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A comparison of data fusion techniques for target detetction with a wide azimuth sonar
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1995.
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Penentuan arah Kiblat berdasarkan azimuth bulan: Studi akurasi arah Kiblat di Masjid Ulul Albab Universitas Islam Negeri Maulana Malik Ibrahim Malang
… posisi dan pergerakan Matahari sebagai acuan (Azimuth Matahari), sehingga Theodolite akan menjadi alat yang dapat mengetahui arah secara presisi sampai skala detik busur. Mengingat dalam penentuan arah kiblat yang menggunakan alat Theodolite dilakukan pada siang hari, maka peneliti akan mencoba …
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An In-Field Experiment on the Effects of Hearing Protection/Enhancement Devices and Military Vehicle Noise on Auditory Localization of a Gunshot in Azimuth
Noise-induced hearing loss and tinnitus are the two most prevalent service-connected disabilities for veterans receiving compensation (Department of Veterans Affairs, 2010). While it is possible to protect against noise-induced hearing damage with hearing protection devices (HPDs) and hearing …
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Ukraine's foreign and security policy 1991-2000: the regional dimension
… regional neighbours. Secondly, along the Western azimuth Kyiv established the 'strategic objective' of integration with the European Union via membership of subregional institutions. The desire to integrate with Western institutions implied a reluctance to integrate more deeply with the …
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Antenna boresight calibration using optimal estimation techniques
… for radar antenna motion. Uncompensated azimuth misalignment of the antenna boresight with respect to the IMU is a significant contributor to motion compensation error. Currently, an awkward to perform, laser based antenna boresight calibration procedure is employed. This thesis …
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Characterization of the Multipath Environment of Ionospheric Scintillation Receivers
… and SANAE IV (71:73° S and 2:2° W) by plotting azimuth-elevation maps of scintillation indices averaged over one year. The azimuth-elevation maps were used to identify objects that regularly scatter signals and cause high scintillation resulting from multipath effects. After identifying the …
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Range-doppler synthetic aperture radar processing at VHF frequencies
… processing at VHF frequencies for wide azimuth beam, airborne, stripmap SAR systems with zero Doppler centroid and modest pulse bandwidths relative to the carrier frequency (simulations less than 30 percent). Such a system is the South African SAR (SASAR) VHF sensor. The theory of such …
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Microwave Remote Sensing of the Greenland Ice Sheet: Models and Applications
… and empirical models to investigate (1) azimuth anisotropies in the data, (2) the microwave signature of the snow surface, (3) detection of snow melt, and (4) classification of snow melt. The results are applicable for identifying geophysical properties of the snow surface and monitoring …
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Extremal effects in rotationally inelastic diffraction
… HD from vacuum cleaved MgO (001) along the [110] azimuth has been studied. A thermal beam at 300 K and 80 K was used. Particular emphasis has been placed on the rotational inelastic processes which accompany diffraction of RD. Singularities in the scattering amplitude for the rotationally …
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Microwave Remote Sensing of Saharan Ergs and Amazon Vegetation
… measurements observed at various incidence and azimuth angles from the NASA Scatterometer (NSCAT), the ERS scatterometer (ESCAT), the SeaWinds scatterometer aboard QuikScat (QSCAT), and the Precipitation Radar (TRMM-PR) aboard the Tropical Rain Monitoring Mission (TRMM) are used to model the …
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Crustal Stress Heterogeneity in the Vicinity of a Geothermal Field: Coso Geothermal Field, CA
… Geothermal Field, CA record variation in the azimuth of principal stress. Image logs of these structures from five boreholes were analyzed to quantify the stress heterogeneity for three geologically distinct locations: two boreholes within the Coso Geothermal Field (one in an actively produced …
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The communication of profile perspective maps: a perceptual study
… distribution in a series of maps at different azimuths as three dimensional mapping entails some amount of hidden views. The probability of correct recognition of congruency between profile maps, and detection of azimuth direction depends on the azimuth used, and complexity of the distribution. …
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A simulation of the single scan accuracy of a two-dimensional pulsed surveillance radar
… and these are considered in detail. Different azimuth estimation techniques are described, and their performances are evaluated with the aid of the signal simulation. The best azimuth accuracy performance is obtained with the class of analogue processing estimators, but they are found to be …
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High performance path following for marine vehicles using azimuthing podded propulsion
… rotates about its vertical axis to a specified azimuth angle, the entire thrust of the propeller contributes to the steering moment without relying on lift generation by a control surface such as a rudder. However, the larger sideforce and moment cause the ship to enter the nonlinear realm …
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An analysis of perceptual errors in perspective displays
… errors observed in perspective displays, such as azimuth and inter-object distance estimation errors, were related to observers wrongly estimating the distance between themselves and objects in the virtual world. Four experiments examining inter-object distance estimation were conducted. …
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