Resultados de búsqueda - "Synthetic-aperture radar"

Application of multitemporal ERS-2 synthetic aperture radar in delineating rice cropping systems in the Mekong River Delta, Vietnam por Soo Chin Liew, Suan-Pheng Kam, To-Phuc Tuong, Ping Chen, Vo Quang Minh, Hock Lim

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Monitoring corn nitrogen nutrition index from optical and synthetic aperture radar satellite data and soil available nitrogen por Lapaz Olveira, Adrián, Castro Franco, Mauricio, Sainz Rozas, Hernan Rene, Carciochi, Walter, Balzarini, Mónica, Avila, Oscar, Ciampitti, Ignacio, Reussi Calvo, Nahuel Ignacio

“…Therefore, the aim of this study was to assess NNI predicted from optical and C-band Synthetic Aperture Radar (C-SAR) satellite data and available soil N (Nav) at different vegetative growth stages for corn crop. …”
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Synergistic use of Sentinel-1 and Sentinel-2 data for Fall Armyworm infestation detection and mapping in maize croplands por Dzurume, Tatenda, Darvishzadeh, Roshanak, Dube, Timothy, Amjath-Babu, T.S., Billah, Mutasim, Syed Nurul Alam, Kamal, Mustafa, Harun-Or-Rashid, Md., Biswas, Badal Chandra, Uddin, Md. Ashraf, Md. Abdul Muyeed, Rahman Shah, Md Mostafizur, Krupnik, Timothy Joseph, Nelson, Andrew

Materias: “…synthetic aperture radar…”
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Rice yield estimation using synthetic aperture radar SAR and the ORYZA crop growth model development and application of the system in South and South por Setiyono, T.D., Quicho, E.D., Holecz, F.H., Khan, N.I., Romuga, G., Maunahan, A., Garcia, C., Rala, A., Raviz, J., Collivignarelli, F., Gatti, L., Barbieri, M., Phuong, D.M., Minh, V.Q., Vo, Q.T., Intrman, A., Rakwatin, P., Sothy, M., Veasna, T., Pazhanivelan, S., Mabalay, M. R. O.

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Synthetic Aperture Radar (SAR)-based paddy rice monitoring system: Development and application in key rice producing areas in Tropical Asia por Setiyono, T.D., Holecz, F., Khan, N.I., Barbieri, M., Quicho, E., Collivignarelli, F., Maunahan, A., Gatti, L., Romuga, G.C.

“…Reliable and regular rice information is essential part of many countries' national accounting process but the existing system may not be sufficient to meet the information demand in the context of food security and policy. Synthetic Aperture Radar (SAR) imagery is highly suitable for detecting lowland paddy rice, especially in tropical region where pervasive cloud cover in the rainy seasons limits the use of optical imagery. …”
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Early season prevented and failed rice sowing detection using temporal Synthetic Aperture Radar data in coastal India for crop insurance applications por Murugesan, Deiveegan, Renaud, Mathieu

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Ratoon rice mapping based on Sentinel-1 and Sentinel-2 imagery por Fikriyah, Vidya Nahdhiyatul, Darvishzadeh, Roshanak, Laborte, Alice, Nelson, Andrew

Materias: “…synthetic aperture radar…”
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A decadal historical satellite data and rainfall trend analysis (2001–2016) for flood hazard mapping in Sri Lanka por Alahacoon, Niranga, Matheswaran, Karthikeyan, Pani, Peejush, Amarnath, Giriraj

“…This study combined rainfall trend analysis using Asian Precipitation—Highly Resolved Observational Data Integration towards Evaluation of Water Resources (APHRODITE) gridded rainfall data with flood maps derived from Synthetic Aperture Radar (SAR) and multispectral satellite to arrive at holistic spatio-temporal patterns of floods in Sri Lanka. …”
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Comparison of UAV and SAR performance for crop type classification using machine learning algorithms: a case study of humid forest ecology experimental research site of west Africa por Duke, O.P., Alabi, T.R., Neeti, N., Adewopo, Julius

“…A synergistic approach comprising a high-resolution multispectral UAV optical dataset and synthetic aperture radar (SAR) can help understand spectral features of target objects, especially with crop type identification. …”
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Mapping and Monitoring Fractional Woody Vegetation Cover in the Arid Savannas of Namibia Using LiDAR Training Data, Machine Learning, and ALOS PALSAR Data por Wessels, Konrad, Mathieu, Renaud, Knox, Nichola, Main, Russell, Naidoo, Laven, Steenkamp, Karen

“…The aim of study was to develop a system to map and monitor fractional woody cover (FWC) at national scales (50 m and 75 m resolution) using Synthetic Aperture Radar (SAR) satellite data (Advanced Land Observing Satellite (ALOS) Phased Arrayed L-band Synthetic Aperture Radar (PALSAR) global mosaics, 2009, 2010, 2015, 2016) and ancillary variables (mean annual precipitation—MAP, elevation), with machine learning models that were trained with diverse airborne Light Detection and Ranging (LiDAR) data sets (244,032 ha, 2008–2014). …”
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Assessing the accuracy for area-based tree species classification using Sentinel-1 C-band SAR data por Udali, Alberto

“…The re-mote sensing data used were C-band Synthetic Aperture Radar (SAR) data from Sentinel-1. Dual polarization backscatter values were extracted for the period October 2017 - February 2019 and the area-based method was applied. …”

Mapping of clear-cuts in Swedish forest using satellite images acquired by the radar sensor ALOS PALSAR por Krantz, Anders

“…An extensive dataset of images acquired by the Advanced Land Observing Satellite Phased Array type L-band Synthetic Aperture Radar (ALOS PALSAR) is investigated for clear-cut detection in boreal forests in northern Sweden (Lat. 64°14’ N, Long. 19°50’ E). …”

Satellite based approach for rice yield monitoring and forecasting por Mathieu, Renaud, Murugesan, Deiveegan, Maunahan, Aileen, Quicho, Emma, Sataphaty, Sushree, Dossou-Yovo, Elliott Ronald, Salif, Doumba, Akpoffo, Marius, Gatti, Luca

“…Results from study sites in Sikasso and Segou regions suggest that incorporating remote sensing data, specifically Synthetic aperture radar (SAR), into a process-based crop model improves the spatial distribution of yield estimates. …”
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Framskrivning av ALS data med TanDEM-X por Wästlund, André

“…Satellitparet TanDEM-X och TerraSAR-X levererar InSAR (Interferometric synthetic aperture radar) data med möjlighet till beräkning av en tredje dimension och potential för goda skattningar, med hög temporal upplösning. …”
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Analys av säsongsvariationer vid skattning av skogliga variabler med InSAR teknik por Sjödin, Edward

“…Interferometrisk Synthetic Aperture Radar (InSAR) är en radarteknik som satelliterna i TanDEM-X möjliggör. …”
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Eco-hydrological characterization of inland wetlands in Africa using L-Band SAR por Rebelo, Lisa-Maria

“…Multi-temporal L-band Synthetic Aperture Radar (SAR) datasets are combined with Landsat Thematic Mapper and ASTER images, digital elevation models, and vegetation species data to provide information on wetland ecology and hydrology. …”
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Training guide: advancing paddy mapping using open-source earth observation data and geospatial technologies por Jayamini, Kalpani, Alahacoon, Niranga, Amarnath, Giriraj

“…Targeted at technical officers, researchers, and analysts, the guide demonstrates how different platforms such as Google Earth Engine, Google Colab, QGIS, and Python can deliver reliable rice extent maps and seasonal monitoring using Sentinel-1 Synthetic Aperture Radar (SAR). The guide details the full workflow: creating and linking a GEE Cloud Project, authenticating service accounts in Colab, preprocessing time-series SAR data, extracting indices (e.g., mRVI), treating outliers, classifying start-peak-harvest stages, and performing validation and accuracy assessments with ground observations. …”
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QGIS plugin for fine-scale hazard, exposure, vulnerability, and risk mapping por Jayamini, Kalpani, Alahacoon, Niranga, Amarnath, Giriraj

“…A key feature of the plugin is its use of multi-year Sentinel-1 Synthetic Aperture Radar (SAR) imagery to derive flood Hazard. …”
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Modelling the flood-risk extent using LISFLOOD-FP in a complex watershed: case study of Mundeni Aru River Basin, Sri Lanka por Amarnath, Giriraj, Umer, Yakob, Alahacoon, Niranga, Inada, Yoshiaki

“…Results from the flood inundation model were evaluated using Synthetic Aperture Radar (SAR) images to assess product accuracy. …”
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Quality Control of CyGNSS Reflectivity for Robust Spatiotemporal Detection of Tropical Wetlands por Arai, Hironori, Zribi, Mehrez, Oyoshi, Kei, Dassas, Karin, Huc, Mireille, Sobue, Shinichi, Thuy Le Toan

“…The behaviors of the GNSS-R reflectivity and the Advanced Land Observing Satellite-2 Phased-Array type L-band Synthetic Aperture Radar-2 quadruple polarimetric scatter signals were compared and found to be nonlinearly correlated due to the influence of the incidence angle and the effective scattering area.…”
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