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 22 for “"Optical Imagery"”.
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Landslide kinematics and interactions studied in central Georgia by using synthetic aperture radar interferometry, optical imagery and inverse modeling
Landslides are one of the biggest natural hazards in Georgia, a mountainous country in the Caucasus. So far, no systematic monitoring and analysis of the dynamics of landslides in Georgia has been made. Especially as landslides are triggered by extrinsic processes, the analysis of landslides …
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Remote sensing of river kinematics and their expression in the modern and ancient stratigraphic record
… river kinematics using timelapse satellite imagery and characterization of uniquely exposed ancient river deposits using photogrammetric and numerical modeling approaches. The research described herein focuses on three central themes: (1) the geomorphic and stratigraphic impact of …
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Statistical methods for 2D-3D registration of optical and LIDAR images
Fusion of 3D laser radar (LIDAR) imagery and aerial optical imagery is an efficient method for constructing 3D virtual reality models. One difficult aspect of creating such models is registering the optical image with the LIDAR point cloud, which is a camera pose estimation problem. We propose a …
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Mapping the maize growth period using multi-temporal sentinel 1 and 2 imagery: a case study in Kasisi area of Chongwe district.
… Aperture Radar (SAR) from Sentinel 1 and Optical imagery from Sentinel 2 multi spectral instrument (MSI) for mapping and monitoring Maize fields in the Kasisi area of Chongwe District, Zambia, from November, 2019 to April 2020. This was done by capturing the temporal variations in maize …
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Mapping the maize growth period using multi-temporal sentinel 1 and 2 imagery: a case study in Kasisi area of Chongwe district.
… Aperture Radar (SAR) from Sentinel 1 and Optical imagery from Sentinel 2 multi spectral instrument (MSI) for mapping and monitoring Maize fields in the Kasisi area of Chongwe District, Zambia, from November, 2019 to April 2020. This was done by capturing the temporal variations in maize …
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Subsurface Planetary Investigation Techniques and Their Role for Assessing Subsurface Planetary Composition
… future modelling, interpretation and analysis of optical imagery and radar data. We performed dielectric permittivity and hardness measurements for volcanic rocks in order to provide a cross relation between the dielectric constant of the investigated material and its hardness property. A linear …
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Delineation of Surface Water Features Using RADARSAT-2 Imagery and a TOPAZ Masking Approach over the Prairie Pothole Region in Canada
… potholes on an ongoing and cost-effective basis. Optical satellite imagery is able to detect surface water but only under cloud-free conditions, a substantial limitation for operational monitoring of surface water variability. However, as an active sensor, RADARSAT-2 (RS-2) has the ability to …
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Snowmelt Detection on Alpine Glaciers using Synthetic Aperture Radar Time Series
… comparison of melt classification results to optical imagery captured near the end of seasonal melt reveals that dual polarized melt measurements are concentrated within areas of apparent glacier accumulation yet cross-polarized melt detection occurs more homogeneously across glacier surfaces …
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Analysis of landslide volume, structures, and kinematics from satellite imagery of the 2016 Lamplugh rock avalanche, Glacier Bay National Park and Preserve, Alaska, An
… on record in GBNP. WorldView satellite stereo imagery was used to derive pre- and post-event, high-resolution (2m) Digital Elevation Models (DEMs). Differenced DEMs were used to calculate both source and deposit volumes and examine variations in deposit thickness. DEMs were also used in …
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A Microscale Analysis of Millimeter-wave Induced Vitrified Basalt for Use in Enhanced Geothermal Energy Systems
… (EDS), Nano-Indentation, Raman Spectroscopy, and optical imagery. The results presented in this thesis show the creation of a non-crystalline amorphous solid that has relatively high strength values with slight evidence of micro-cracking. There are significant elemental differences between the …
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Flood risk modeling and impact assessment using google earth engine in Mpumalanga province, South Africa
… systems. The integration of SAR data with optical imagery and weather data within the GEE platform proved effective for operational flood monitoring in data-scarce regions. The methodology provides a scalable, cost-effective framework that can be applied to similar contexts across Southern …
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Neotectonics Study Along The Frontal Thrust System Of The Fold-Thrust Belt Of Northwest Himalayas, Pakistan
… with geologic structures. I used the Sentinel-2B optical imagery and compiled a geologic map using band ratios. Further, the InSAR-SBAS technique was applied with geomorphic indices calculation using Sentinel-1A and TanDEM-X to analyze surface deformation. This work suggests that the frontal …
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Combining remotely sensed estimates of structure and function to improve quantification of forest productivity
… a combination of physiological function from optical imagery and morphological structure from lidar. The first study investigates the photochemical reflectance index (PRI) and how illumination affects the diurnal and vertical distributions of two managed pine stands with varying ages and row …
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Towards the Advancement of Rotating Synthetic Aperture Space Telescope Technology
Optical imagery of the Earth from space-based telescopes is one of the most valuable tools for understanding various large and small-scale processes. Value is derived from the unique observing perspective on orbit, which has enabled an expansive list of new science from the discovery of the ancient …
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Quantifying seasonal snow using very-high-resolution stereo optical satellite images
… stereo photogrammetry using commercial optical imagery to make fine-scale measurements of seasonal snow across a variety of snow climates including the maritime snowpack of the Washington North Cascades, the continental snowpack of the Colorado Rockies, and the boreal forest / taiga of …
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Temporal, spatial, spectral and polarisation characteristics of the SAR backscatter from regenerating tropical forests
… low levels of biomass has limited the use of optical imagery but not Synthetic Aperture Radar (SAR) imagery for the provision of such information. The biophysical properties of regenerating tropical forests are related to the temporal, spatial, spectral and polarisation characteristics of SAR …
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Internal wave generation and its impact at the island Shelf
… gap by combining in-situ observations, satellite imagery, and high-resolution numerical modeling. The first component examines island-shelf circulation under different forcing regimes, including tides, local winds, and large-scale background flow. A high-resolution (1 km) COAWST configuration is …
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Remote sensing analyses for open pit mine area computation. A comparative study on the implementation of multi-spectral classifications and crowdsourcing to compute the spatial extent of four open-pit mines in Indonesia, Australia, Canada and Brazil
… Data sets comprise freely available Sentinel-2 optical imagery, Aster GDEM V2 elevation model and Sentinel-1 synthetic aperture radar imagery. Four copper or iron ore open-pit mines in Indonesia (Grasberg-Ertsberg Gold Copper Mine), Australia (Hamersley Iron Ore Mines), Canada (Highland Valley …
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