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 36 for “"Sentinel-1"”.
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Water Surfaces Detection from Sentinel-1 SAR Images using Deep Learning
… the So2sat dataset, which contains patches of Sentinel-1 satellite SAR images. Next, we use the trained neural network to detect water from SAR images of several cities. The obtained results show satisfactory scores and also visually appear accurate. In the final optimization phase, we: a) …
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Analysis of the surface hydrology of the Greenland Ice Sheet using Sentinel-1 Synthetic Aperture Radar
… study uses imagery from the recently launched Sentinel-1 Synthetic Aperture Radar sensors to investigate supraglacial lakes in southwest Greenland. This novel method can overcome some of the limitations of optical sensors that are more commonly used for investigations of the surface hydrology …
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Investing Hysteresis in Floodplain Dynamics of Lakes in the Middle St. Johns River Using Sentinel-1 SAR Imagery
… inundation phases. This study leverages Sentinel-1 synthetic aperture radar (SAR) imagery to map flood extent in the Middle St. Johns River Lake floodplains and examine the presence of hysteresis during flood events. SAR scenes corresponding to river gauge readings were analyzed from the …
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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.
… aimed to use Synthetic 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 …
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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.
… aimed to use Synthetic 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 …
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Determination and analysis of land deformation in major landslide areas in Kenya using geospatial techniques: A case study of Murang a and Nyeri counties
… RADAR (InSAR) from processed ALOS PALSAR and Sentinel-1 datasets, Gravity Recovery and Climate Experi-ment (GRACE/GRACE-FO) satellite data, and hydrological modelling data from the Global Land Data Assimilation System (GLDAS), to elucidate and dissect the time series deformation trends …
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Determination and analysis of land deformation in major landslide areas in Kenya using geospatial techniques: A case study of Murang a and Nyeri counties
… RADAR (InSAR) from processed ALOS PALSAR and Sentinel-1 datasets, Gravity Recovery and Climate Experi-ment (GRACE/GRACE-FO) satellite data, and hydrological modelling data from the Global Land Data Assimilation System (GLDAS), to elucidate and dissect the time series deformation trends …
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Flood risk modeling and impact assessment using google earth engine in Mpumalanga province, South Africa
… platform and multi-source spatial data (Sentinel-1 SAR, Sentinel-2 and CHIRPS). The study aimed to assess flood dynamics in the study area through two main components: a detailed assessment of flood events and an inter-annual analysis covering the period 2020-2024. Firstly, a flood event …
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Spatio-temporal analysis of coastal sediment erosion in Cape Town through remote sensing and geoinformation science
… by applying Differential Interferometry to Sentinel-1 SLC data and the Waterline method through a combination of Sentinel -1 GRD and tide gauge data. The accuracy, validation and correction of these elevation models was conducted at the pixel level by comparison to an in-field RTK GPS survey …
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Delineation of Landslide Hazard and Development of Mitigation Tools in a Vulnerable City
… Similarly, at the Richardson Avenue landslide, Sentinel-1 InSAR analysis determined that gradual deformation began in 2017 following two ex-tropical cyclone events. The deformation downslope continued until an initial failure in July 2020. Subsequent to that event, some parts of the slope …
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SAR for superficial soil moisture retrieval at the field scale over an agricultural area
… Detection method is applied to copolarized Sentinel-1 data, with a focus on taking into account the component of the total backscattering coefficient due to the presence of subsurface scatterers, recently proposed in literature. By exploiting the strong relationships detected over the study …
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Current Land Subsidence And Fault Movement In The Long Point Fault Area
… land subsidence using a combined GPS and Sentinel-1 InSAR approach spanning 2013-2026. Continuous and campaign-style GPS displacement time-series from eleven LPF network stations, processed within the Gulf of Mexico 25 (GOM25) stable geodetic reference frame, are analyzed for full-record …
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Evaluating Interferometric Synthetic Aperture Radar Coherence for Coastal Geomorphological Changes
… thesis was based on SAR data acquired by the Sentinel-1 SAR antenna and the results demonstrated the limitations of the sensor for terrain mapping and DEM reconstruction. In addition, the significance of the vegetation on the interferometric coherence was demonstrated. However, the results …
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Impact of Wind Driven Variability on Sea Surface Temperature and Ocean Colour in False Bay
… resolution (1 km) coastal winds derived from the Sentinel-1 satellite Synthetic Aperture Radar (SAR) show that winds are strongly influenced by topography under the predominantly south-easterly wind regime. The Hottentots Holland mountain range and Cape Peninsula mountain range create wind shadows …
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Sentinel palydovinių duomenų analizės taikymas karo poveikiui aplinkai tirti /
… located in different war-affected areas. Using Sentinel 2 data, it examines the impact of direct hostilities on fields located in Zaporizhzhya, Luhansk and Kharkiv oblasts, where clashes and shelling are still ongoing. It also uses Sentinel 2, Sentinel 1 and historical weather data to …
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A Deep Learning Study on the Retrieval of Forest Parameters from Spaceborne Earth Observation Sensors
… evaluated, with a particular emphasis on the ESA Sentinel-1 and Sentinel-2 missions. The developed deep learning framework sets a solid groundwork for the generation of large-scale products of bio-physical forest parameters from spaceborne EO data. The approach achieves cutting-edge performance, …
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Snowmelt Detection on Alpine Glaciers using Synthetic Aperture Radar Time Series
… this study detects melt characteristics from Sentinel-1 SAR backscatter intensity time series over glacier surfaces using a classification threshold based on a decrease in backscatter intensity relative to average values across the frozen season. Statistical analysis of the radiometric …
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Multi-stage processing for effective segmentation of SAR sea ice images
… satellites were launched such as the TerraSAR, Sentinel-1 etc, which made possible to acquire High-Resolution imagery of remote areas such as the Arctic region. Consequently, with the accessibility to such large amounts of data, it becomes necessary to develop fast, robust and automated image …
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Comparison of Finite Element Methods and Satellite InSAR for Monitoring Deformations of a Large Tailings Dam
… ending in 2019, by analyzing 186 ascending Sentinel-1 C-band images and 219 descending images using Persistent Scatterer Interferometry and SARProzTM software, comparing results with two surface geodetic benchmarks. Finite element analyses of the structure required a 2D model of section …
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Deep image representation learning for knowledge discovery from earth observation data archives
… as BigEarthNet). It includes 590,326 pairs of Sentinel-1 and Sentinel-2 image patches acquired over 10 European countries. We make BigEarthNet, its pre-trained DL models and the codes of all the methods publicly available as open source contributions of the thesis.
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