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.
Results
Showing 1 to 20 of 49 for “"radiometry"”.
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Marine optics: field radiometry
In situ optical radiometric methods for the determination of seawater apparent optical properties are comprehensively addressed with the final objective of quantifying measurement uncertainties for remote sensing applications. Emphasis is placed on the presentation and assessment of calibration and …
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Improving Soil Moisture Assessment of Turfgrass Systems Utilizing Field Radiometry
The need for water conservation continues to increase as global freshwater resources dwindle. In response, many golf course superintendents are implementing new methods and tools to become more frugal with their water applications. For example, scheduling irrigation using time-domain reflectometer …
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LIGO interferometer operating at design sensitivity with application to gravitational radiometry
During the last decade the three interferometers of the Laser Interferometer Gravitational Wave Observatory (LIGO) were built and commissioned. In fall 2005 design sensitivity was achieved, corresponding to a strain sensitivity of 2.5 x 10-23 Hz-1/2 at 150 Hz. All three interferometers are now in …
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Rotational Transformation Methods for Radio Occultation and Passive Microwave Radiometry Colocation Analysis
… Occultation (GNSS-RO) and passive microwave radiometry (MWR) provide useful atmospheric profiles for inputs into Numerical Weather Prediction models. However, both remote sensing techniques face unique challenges that require auxiliary atmospheric data to mitigate. GNSS-RO provides extremely …
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Potential for tsunami detection and early-warning using space-based passive microwave radiometry
… microwave radiometer system. Passive microwave radiometry can detect oceanic parameters such as sea-surface temperature and sea surface roughness to contribute to earlier tsunami detection, when the tsunami is farther from shore, which will increase the reaction time for at-risk coastal …
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Quantitative Carrier Transport in Quantum Dot Photovoltaic Solar Cells from Novel Photocarrier Radiometry and Lock-in Carrierography
… quantitative imaging techniques: photocarrier radiometry (PCR), and homodyne (HoLIC) and heterodyne (HeLIC) lock-in carrierographies. Based on the discrete carrier hopping transport in CQDs, various carrier drift-diffusion current-voltage (J-V) analytical models and new concepts including the …
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Lidar and infrared radiometer studies of stratocumulus clouds
… measured by ground-based Lidar and Infrared RADiometry (or LIRAD). The clouds were measured in northwestern Tasmania in the winter of 1993 and summer of 1995 during the Southern Ocean Cloud Experiment (SOCEX). The study done for this thesis represents the first application of the LIRAD method …
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Nonlinear PDE and Optical Surfaces Design
… in R^3 that solve an inverse problem in radiometry, taking into account the inverse square law of irradiance. The problem leads to a Monge-Ampere type inequality. The surfaces in the first model are strictly convex and require to be far from the source to avoid obstruction. In the second …
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Review of current radiometer technology with suggestions for future South African satellites
… of electro-magnetic remote sensing is microwave radiometry. This dissertation presents a short review of currently available space-faring radiometer technologies and applications, which are then discussed in the context of today's South Africa. For instance Passive Microwave Radiometers (PMR) in …
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A bio-optical approach to phytoplankton community sturcture, physiology and primary production on the Weddell Gyre
… temporal scales, through satellite ocean colour radiometry linked to inherent optical properties (IOPs) of the upper water column. In this study, the variability of in situ IOPs was investigated together with phytoplankton biomass, cell size, species composition and chlorophyll to carbon (Chl:C) …
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Optical characterisation of Southern Ocean phytoplankton
… Satellite-based ocean colour remote sensing radiometry is the only observational capability that can provide synoptic views of upper ocean phytoplankton characteristics, at high spatial and temporal resolution of approximately 1 km globally, and a daily temporal resolution over a period of …
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Photon-Number Resolving by Superconductive Devices
… the PNR property results useful even for optical radiometry too. In the optical community, the candela - the International System (SI) unit for the luminous intensity - has not a common consensus whether its present definition fully satisfies the current and future needs of growing associated …
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Design and construction of a low cost, modular Autonomous Underwater Vehicle
… zone of the coastal shelf using photography and radiometry instruments. In order to streamline Didemnum research, a new, low cost and modular AUV was designed and built to replace Odyssey IV as the primary Didemnum research vehicle. This new AUV is a shallow cruising vehicle with a depth rating …
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Analysis of Ionospheric Data Sets to Identify Periodic Signatures Matching Atmospheric Planetary Waves
… of the Atmosphere using Broadband Emission Radiometry (SABER). These highlight periods during which 2-Day westward propagating wave-number 3 waves are evident in the mesosphere and lower thermosphere. The ionospheric data-set is Total Electron Content (TEC), which is used to identify periods …
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Developing a Multi-Band GNSS Remote Sensing Station To Measure Precipitable Water Vapor for Flash Flood Nowcasting
… methods, such as Doppler radar and microwave radiometry, suffer from reduced resolution at long range and signal blockage by mountains. GNSS-meteorology offers an established alternative for measuring precipitable water vapor and is currently integrated into several numerical weather models. …
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Design and Implementation of a Passive Stereo-Infrared Imaging System for the Surface Reconstruction of Water Waves
… wavelengths. Following a review of infrared radiometry, the key ingredients of surface reconstruction using the stereo principle are explained, including camera calibration, epipolar geometry and disparity estimation. A description of the stereo infrared camera system used in this work is …
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Sensing atmospheric water vapour using the global positioning system
… techniques, namely radiosondes, water vapour radiometry and very long baseline interferometry (VLBI). A high degree of correlation is observed in all instances of inter-technique comparison. The usefulness of GPS-derived slant delays is demonstrated by their ability to reduce VLBI …
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Automated rapid thermal imaging systems technology
… synthetic aperture imaging system * 3D Radiometry * Non-radiometric infrared camera calibration techniques * Image enhancement algorithms - Hyper Resolution o Kinetic Super Resolution - Thermal Signature Identification - Low-Light Signal-to-Noise Enhancement using KSR
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