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 9 of 9 for “"active microwave"”.
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Development of active microwave thermography for structural health monitoring
"Active Microwave Thermography (AMT) is an integrated nondestructive testing and evaluation (NDT&E) method that incorporates aspects of microwave NDT and thermography techniques. AMT uses a microwave excitation to generate heat and the surface thermal profile of the material or structure under test …
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Data Fusion and Synergy of Active and Passive Remote Sensing; An application for Freeze Thaw Detections
… dissertation aims to enhance the synergy use of active and passive microwave observations and examine the results in detection land freeze and thaw (FT) predictions. Freeze thaw cycles particularly in high-latitude regions have a crucial role in many applications such as agriculture, …
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Photonic generation of microwave signals : a quantum dot mode locked laser as a microwave source
Microwave signals can be photonically generated inside a quantum dot, passively mode locked laser. In order for this laser to be used as a microwave source, a microwave interface was created and connected to the laser. To characterize the source, its output microwave impedance was measured by using …
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Measurement of snowpack properties using active FM-CW microwave systems
This paper reports on the use of an FM-CW active microwave system, in a research mode, to remotely sense water equivalence and liquid water content of snowpacks. A three-component "electrical path length" dielectric mixture model is described which accounts for the microwave system response as a …
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Hurricane Wind Retrieval Algorithm Development For An Airborne Conical Scanning Scatterometer
… wind vector measurements can be obtained using active microwave remote sensing (scatterometry) techniques. With the increase in the number of severe hurricanes making landfall in the United States, there is increased emphasis on operational monitoring of hurricane winds from aircraft. This …
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Radar Altimetric Studies of Polar Ice
Active microwave sensors are known to provide valuable information regarding snow and ice surfaces in the polar regions, where darkness and cloud cover prevail. Here, data collected in the Arctic by a Ku-band microwave radar altimeter, designed and constructed in the UK, are analysed. The two main …
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Multitemporal InSAR in land-cover and vegetation mapping
Synthetic Aperture Radar (SAR) is an active microwave instrument that has a number of favourable characteristics, one of which is its independence from lighting conditions or cloud cover, which make it an indispensable instrument for earth observation from space. Classification of land cover and …
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Microwave remote sensing of water in the soil - plant system
… made by radars or radiometers in the low microwave frequency range are sensitive to soil moisture, soil roughness, and vegetation water content. Measurements made at multiple polarizations can be used to determine additional ancillary parameters alongside the primary variable of interest. …