Hyung-Sup Jung, Zhong Lu, Lei Zhang,
The European Space Agency's Sentinel-1, a C-band imaging radar mission to be launched in mid-2013, will provide a continuity of radar data for monitoring the changing Earth. The azimuth resolution of Sentinel-1's background mode, interferometric wide-swath (IW) mode, ... the measurement accuracy of along-track displacement from Sentinel-1 IW images presumably will be significantly reduced. In ... the feasibility of along-track displacement measurement from Sentinel-1 IW mode. We simulate Sentinel-1 IW synthetic ...
Tópico(s): Advanced SAR Imaging Techniques
2012 - Institute of Electrical and Electronics Engineers | IEEE Transactions on Geoscience and Remote Sensing
Edward A. Velasco Pereira, Ma Ángeles Varo-Martínez, Francisco J. Ruíz-Gómez, Rafael M. Navarro‐Cerrillo,
... of Mediterranean pine forests by integrating ALOS-PALSAR, Sentinel 1, and Landsat 8 data. Variables selected from the ... models with the highest performance integrated ALS-ALOS2-Sentinel 1-Landsat 8 data (R2 = 0.59) by following ... using ALS data (R2 = 0.56), and ALOS2-Sentinel 1-Landsat 8 (R2 = 0.50). The validation set ... that R2 values vary from 0.55 (ALOS2-Sentinel 1-Landsat 8) to 0.60 (ALS-ALOS2-Sentinel 1-Landsat 8 model) with RMSE below 20 Mg ha−1. It is noteworthy that the individual Sentinel 1 (R2 = 0.49). and Landsat 8 (R2 = 0. ...
Tópico(s): Forest ecology and management
2023 - Multidisciplinary Digital Publishing Institute | Remote Sensing
Melanie K. Vanderhoof, Laurie C. Alexander, Jay R. Christensen, Kylen Solvik, Peter Nieuwlandt, Mallory Sagehorn,
... of aquatic habitat, flood risk and water quality. Sentinel-1 and Sentinel-2 satellites can provide such observations, ... vegetation conditions. We developed surface inundation algorithms for Sentinel-1 and Sentinel-2, respectively, at 12 sites across ... water at 20 m resolution using variables from Sentinel-1 and Sentinel-2, as well as variables derived from topographic and weather datasets. The Sentinel-1 algorithm was developed distinct from the Sentinel-2 ... only 3.1% and 0.9% for the Sentinel-1 algorithm and 3.1% and 0.5% for ...
Tópico(s): Tropical and Extratropical Cyclones Research
2023 - Elsevier BV | Remote Sensing of Environment
Yakun Zhang, Alfred E. Hartemink, Jingyi Huang, Philip A. Townsend,
... data with space‐borne data (LiDAR DEM and Sentinel‐1) to map soil properties and investigate the contributions ... Three types of variables were compared: (a) DEM + Sentinel‐1 & 2, as these are easy‐to‐obtain, (b) ... high‐spatial resolution, and (c) hyperspectral data + DEM + Sentinel‐1, to evaluate if the prediction can be improved by combining hyperspectral data with DEM + Sentinel‐1, and if combining DEM + Sentinel‐1 with hyperspectral data had higher prediction accuracy than ... Fe concentrations. Combining hyperspectral data with DEM and Sentinel‐1 improved the performance of models for mapping a ...
Tópico(s): Remote Sensing in Agriculture
2021 - Wiley | European Journal of Soil Science
Junwoo Kim, Hwisong Kim, Hyungyun Jeon, Seunghwan Jeong, Juyoung Song, S. Vadivel, Duk‐jin Kim,
... of geospatial data for water body extraction from Sentinel-1 data using deep learning and the applicability of ... based on a deep neural network that exploits Sentinel-1 data and flood-related geospatial datasets. For the ... U-Net was customised and optimised to utilise Sentinel-1 data and other flood-related geospatial data, including ... water body extraction model was applied to three Sentinel-1 images for Vietnam, Myanmar, and Bangladesh. By segmenting 384 Sentinel-1 images, model performance and segmentation accuracy for all ...
Tópico(s): Groundwater and Watershed Analysis
2021 - Multidisciplinary Digital Publishing Institute | Remote Sensing
Yong Wan, Sheng Guo, Ligang Li, Xiaojun Qu, Yongshou Dai,
... means to observe the sea surface wind field. Sentinel-1 and GF-3 are located on orbit SAR ... This paper mainly studies the data quality of Sentinel-1 and GF-3 SAR satellites used in wind field inversion. In this study, Sentinel-1 SAR data and GF-3 SAR data located ... the root mean squared error (RMSE) of the Sentinel-1 inversion results is 1.66 m/s, 1. ... m/s, respectively. Based on the data of Sentinel-1 and GF-3 located on the east and ... with the buoy data, the RMSE of the Sentinel-1 inversion results is 1.20 m/s, and ...
Tópico(s): Arctic and Antarctic ice dynamics
2021 - Multidisciplinary Digital Publishing Institute | Remote Sensing
... Seven years after the launch of the first Sentinel-1 satellite, its data have been widely used in ... first quantitative analysis of the visibility of the Sentinel-1 mission to the scientific literature through a bibliometric ... The main findings show that the number of Sentinel-1 mission-related papers increased significantly over the years, ... 22% in the collection. Research based on the Sentinel-1 data covered a wide range of topics in ... subsidence, is the most important research direction using Sentinel-1 data. Image fusion of Sentinel-1 and Sentinel- ...
Tópico(s): Geochemistry and Geologic Mapping
2022 - Springer Science+Business Media | Arabian Journal of Geosciences
Khuong H. Tran, Massimo Menenti, Jia Li,
... Mekong Delta (VMD). Although synthetic aperture radar (SAR) Sentinel-1 imagery is widely used for water management, only a few studies have used Sentinel-1 data for mapping surface water and monitoring flood ... i) automatic Otsu threshold on a series of Sentinel-1 images to extract surface water and (ii) time ... VH was selected after an assessment of different Sentinel-1 polarizations. The dynamic Otsu thresholding algorithm was applied ... identify an optimal threshold for each pre-processed Sentinel-1 VH image to separate water from non-water ...
Tópico(s): Hydrological Forecasting Using AI
2022 - Multidisciplinary Digital Publishing Institute | Remote Sensing
Harm-Jan F. Benninga, R. van der Velde, Zhongbo Su,
... accuracy of soil moisture retrievals. This study estimates Sentinel-1’s radiometric uncertainty, identifies the effects of weather- ... developed based on meteorological measurements and timeseries of Sentinel-1 observations collected over five forests, five meadows and ... in the eastern part of the Netherlands. The Sentinel-1 σ 0 observations appear to be affected by ... an air temperature of 1 ∘ C , snow during Sentinel-1’s morning overpasses on meadows and cultivated fields ... of rain in the 12 h preceding a Sentinel-1 overpass, whereas dew was not found to be ...
Tópico(s): Soil and Unsaturated Flow
2019 - Multidisciplinary Digital Publishing Institute | Remote Sensing
Michele Meroni, Raphaël d’Andrimont, Anton Vrieling, Dominique Fasbender, Guido Lemoine, Felix Rembold, Lorenzo Seguini, Astrid Verhegghen,
... observations are not restricted by weather conditions, and Sentinel-1 thus ensures more frequent observations of the land ... extracted crop-specific land surface phenology (LSP) from Sentinel-1 and Sentinel-2 of major European crops (common ... ratio of the backscattering coefficient VH/VV from Sentinel-1) and NDVI (Normalized Difference Vegetation Index from Sentinel-2). Our analysis revealed that LSP retrievals from Sentinel-1 are comparable to those of Sentinel-2, particularly ... start of season (SOS) timings, as derived from Sentinel-1 and -2, are significantly correlated (average r of ...
Tópico(s): Land Use and Ecosystem Services
2020 - Elsevier BV | Remote Sensing of Environment
Yueqing Chen, Sijia Qiao, Guangxin Zhang, Y. Jun Xu, Liwen Chen, Lili Wu,
... investigated.In this study, we produced a multitemporal Sentinel-1 C-band VV-polarized SAR backscatter images and ... Reserve to investigate the interferometric coherence level of Sentinel-1 C-VV data as a function of perpendicular ... the accuracy of water level changes monitored by Sentinel-1 InSAR. The accuracy of water level changes determined through the Sentinel-1 InSAR technique was calibrated by the values of ... was little affected by the perpendicular baseline for Sentinel-1 C-VV data in marsh wetlands; (2) in ...
Tópico(s): Flood Risk Assessment and Management
2020 - PeerJ, Inc. | PeerJ
Tao Zhou, Yajun Geng, Jie Chen, Jianjun Pan, Dagmar Haase, Angela Lausch,
... global carbon and nitrogen cycles. High-resolution radar Sentinel-1 and multispectral Sentinel-2 images have the potential ... spatial distribution information over a large area, although Sentinel-1 and Sentinel-2 data have rarely been combined ... using digital elevation model (DEM) derivatives, multi-temporal Sentinel-1 and Sentinel-2 data, and evaluated the potential of different remote sensing sensors (Sentinel-1 and Sentinel-2) to predict SOC and STN ... contents than individual sensors. The application of radar Sentinel-1 and multispectral Sentinel-2 images proved useful for ...
Tópico(s): Soil erosion and sediment transport
2020 - Elsevier BV | The Science of The Total Environment
Farzane Mohseni, S. Mohammad Mirmazloumi, Mehdi Mokhtarzade, Sadegh Jamali, Saeid Homayouni,
SMAP/Sentinel-1 soil moisture is the latest SMAP (Soil Moisture Active Passive) product derived from synergistic utilization of the ... observations of SMAP and radar backscattering data of Sentinel-1. This product is the first and only global ... resolutions. In this paper, we evaluated the SMAP/Sentinel-1 SM product from different viewpoints to better understand ... conditions on the performance of active–passive SMAP/Sentinel-1 in estimating the SM. We also compared the ... metrics of enhanced SMAP (9 km) and SMAP/Sentinel-1 products (3 km) to analyze the effects of ...
Tópico(s): Cryospheric studies and observations
2022 - Multidisciplinary Digital Publishing Institute | Remote Sensing
Mary Lum Fonteh, Théophile Fonkou, M. Lambi Cornelius, Russell Main, Abel Ramoelo, Moses Azong Cho,
... as Landsat imagery. The advent of freely available Sentinel-1 C band synthetic aperture radar (SAR) imagery offers ... In this study, we investigated the utility of Sentinel-1 for extracting land use land cover (LULC) information ... TM). We also assessed the potential of integrating Sentinel-1 and Landsat. The major LULC classes in the ... correlation, contrast and entropy were derived from the Sentinel-1 C band. Various conventional image processing techniques and ... validated using SAR imagery due to speckles. The Sentinel-1 only classification yielded a lower overall classification accuracy ( ...
Tópico(s): Remote Sensing and Land Use
2016 - Scientific Research Publishing | Journal of Geographic Information System
Claudio De Luca, Manuela Bonano, Francesco Casu, Adele Fusco, R. Lanari, Michele Manunta, M. Manzo, Antonio Pepe, Ivana Zinno,
Sentinel-1 is the first of a family of satellites designed to provide a data stream for the European environmental monitoring program known as Copernicus. Sentinel-1 constellation has been specifically designed to perform, over ... is fundamental for guaranteeing a global spatial coverage, Sentinel-1 constellation is contributing to the creation of a ... DInSAR algorithm, specifically intended for the processing of Sentinel-1 SAR data. The algorithm is able to run ... a short time frame, very large sequences of Sentinel-1 data, thus allowing us to perform advanced interferometric ...
Tópico(s): Cryospheric studies and observations
2016 - Elsevier BV | Procedia Computer Science
Simona Niculescu, Cédric Lardeux, Jenică Hanganu,
... obtained by radar and optical satellites, such as Sentinel-1 and Sentinel-2, have been used. The sensitivity ... addition, the high temporal acquisition frequencies used by Sentinel-1, which are not sensitive to cloud cover, allow ... we analyze the polarimetric and temporal signatures of Sentinel-1 data. In a second phase, we perform classifications ... Random Forest supervised classification algorithm involving the entire Sentinel-1 time series, proceeding through a Sentinel-2 collection and finally involving combinations of Sentinel-1 and -2 data. The supervised classifier used is ...
Tópico(s): Remote Sensing and LiDAR Applications
2017 - Springer International Publishing | Coastal research library
Emile Ndikumana, Dinh Ho Tong Minh, Hai Thu Dang Nguyen, Nicolas Baghdadi, Dominique Courault, Laure Hossard, Ibrahim El Moussawi,
... noise nature. The European Space Agency’s (ESA) Sentinel-1 constellation provides synthetic aperture radar (SAR) images coverage ... spatial resolution of pixel spacing of 20 m. Sentinel-1 data are considerably useful, as they provide valuable ... for rice height and dry biomass retrievals using Sentinel-1 data. To do this, we train Sentinel-1 data against ground measurements with classical machine learning ... The study is carried out on a multitemporal Sentinel-1 dataset acquired from May 2017 to September 2017 ...
Tópico(s): Soil Moisture and Remote Sensing
2018 - Multidisciplinary Digital Publishing Institute | Remote Sensing
Iftikhar Ali, Senmao Cao, Vahid Naeimi, Christoph Paulik, Wolfgang Wagner,
The Sentinel-1 GRD (ground range detected) Level-1 product generated by the Instrument Processing Facility of the European Space ... end of the data take along track. The Sentinel-1 border noise troubles the creation of clean and ... paper, we evaluate three techniques for removing the Sentinel-1 border noise and compare the results with the existing “Sentinel-1 GRD Border Noise Removal” algorithm implemented in the Sentinel-1 toolbox of the Sentinel application platform. 1 Validation ... algorithms was done using random samples containing 1500 Sentinel-1 scenes selected from a complete Sentinel-1 archive. ...
Tópico(s): Synthetic Aperture Radar (SAR) Applications and Techniques
2018 - Institute of Electrical and Electronics Engineers | IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing
Katsuto Shimizu, Tetsuji Ota, Nobuya Mizoue,
... investigated the use of dense Landsat 8 and Sentinel-1 time series data for detecting disturbances in tropical ... the disturbance probability of each Landsat 8 and Sentinel-1 observation using variables derived from a harmonic regression ... showed that the combination of Landsat 8 and Sentinel-1 achieved an overall accuracy of 83.6% for ... detection using only Landsat 8 (78.3%) or Sentinel-1 (75.5%). Additionally, more timely disturbance detection was achieved by combining Landsat 8 and Sentinel-1. Small-scale disturbances caused by logging led to ...
Tópico(s): Fire effects on ecosystems
2019 - Multidisciplinary Digital Publishing Institute | Remote Sensing
Ioannis Manakos, Georgios Kordelas, Kalliroi Marini,
... of each pixel through a time series of Sentinel-1 images to train local Random Forest classification models ... pixels, and classifies each pixel in the target Sentinel-1 image, accordingly. Reference training data is retrieved from ... the furthest mean day difference between the target Sentinel-1 image and available Sentinel-2 high accurate inundation ... the estimation of credible inundation maps for the Sentinel-1 target date. Various combinations of Sentinel-2 and Sentinel-1 training datasets are examined. The evaluation for eight ...
Tópico(s): Remote Sensing and LiDAR Applications
2019 - Taylor & Francis | European Journal of Remote Sensing
Juliane Huth, Ursula Geßner, Igor Klein, Hervé Yésou, Xijun Lai, Natascha Oppelt, Claudia Kuenzer,
... during floods. The first year completely covered by Sentinel-1 SAR satellite data was 2016, which is used ... approach and the high spatio-temporal resolution of Sentinel-1 imagery enabled the generation of monthly surface water ... maximum extent of the Dongting Lake derived from Sentinel-1 occurred in July 2016, at 2465 km2, indicating ... lake that were not known from previous studies. Sentinel-1 also proves to be capable of mapping the ... lake extent and inundation duration derived from the Sentinel-1 data were compared with excerpts from the Global ...
Tópico(s): Groundwater and Watershed Analysis
2020 - Multidisciplinary Digital Publishing Institute | Remote Sensing
Aliihsan Şekertekin, Aycan Murat Marangoz, Saygın Abdikan,
... of L-band ALOS-2 and C-band Sentinel-1 SAR data for SSM estimation over bare and ... these campaigns. The sensitivity of ALOS-2 and Sentinel-1 polarizations was investigated for bare and vegetation covered ... 2 (R2 = 0.36) and VV polarization of Sentinel-1 (R2 = 0.74). The results demonstrated that the potential of Sentinel-1 for SSM estimation was higher than ALOS-2 ... the MLR analyses, the testing results showed that Sentinel-1 (R2 = 0.73 and RMSE = 1.76 vol%) ... in estimating SSM with both ALOS-2 and Sentinel-1 data. Furthermore, L-band ALOS-2 provided slightly ...
Tópico(s): Precipitation Measurement and Analysis
2020 - Elsevier BV | Computers and Electronics in Agriculture
Kamran Azizi, Younes Garosi, Shamsollah Ayoubi, Samaneh Tajik,
... examine the use of radar data obtained from Sentinel-1 imagery with different combinations of topographic attributes and ... Then, a comprehensive set of environmental variables including Sentinel-1, Sentinel-2 and digital elevation model (DEM) were ... dataset A (Sentinel-2 and DEM), dataset B (Sentinel-1 and DEM), dataset C (Sentinel-1 and Sentinel-2), and data set D (Sentinel-1, Sentinel-2 and DEM). After selecting the parsimonious ... one provided by the radar data obtained from Sentinel-1), respectively, were the most important variables in the ...
Tópico(s): Soil and Unsaturated Flow
2023 - Elsevier BV | Soil and Tillage Research
Luan Hong Pham, Lien T.H. Pham, Thanh Duc Dang, Dung Duc Tran, Toan Quang Dinh,
The advent of Sentinel-1 SAR data with high temporal and medium spatial resolutions along with its being unaffected by presence of cloud provided ... study is to explore the possibility of applying Sentinel-1 data together with OBIA and machine learning in ... of Vietnamese Mekong Delta (VMD). Three approaches including Sentinel-1 alone, integrative Sentinel-1 and Sentinel-2 and lastly, only Sentinel-2 ... of improvement of classification accuracy metrics on using Sentinel-1 data. The result showed that SAR data could ...
Tópico(s): Environmental Changes in China
2021 - Taylor & Francis | Geocarto International
Xiaojie Liu, Chaoying Zhao, Qin Zhang, Yueping Yin, Zhong Lu, Sergey Samsonov, Chengsheng Yang, Meng Wang, Roberto Tomás,
... SAR satellites, such as ALOS/PALSAR-2 and Sentinel-1. Therefore, it is appropriate to develop new approaches ... descending ENVISAT, and C-band ascending and descending Sentinel-1 SAR datasets) covering the period of January 2007 ... and time series by fusing ascending and descending Sentinel-1 SAR images, from which the optimal sliding direction ... L-band ALOS/PALSAR-1 and C-band Sentinel-1 SAR images. In order to fill the time ... nearly four years between ALOS/PALSAR-1 and Sentinel-1 SAR images, the Tikhonov regularization (TR) method is ...
Tópico(s): Synthetic Aperture Radar (SAR) Applications and Techniques
2021 - Elsevier BV | Remote Sensing of Environment
Liujun Zhu, Rui Si, Xiaoji Shen, Jeffrey P. Walker,
... feasibility of soil moisture retrieval from C-band Sentinel-1 data has been widely acknowledged, with pre-operational ... questionable even for a short period of 4 Sentinel-1 acquisitions (18–36 days). An advanced change detection ( ... study for an improved soil moisture retrieval from Sentinel-1 data, including two main modifications with respect to ... the effect of temporal varying vegetation on the Sentinel-1 backscatter as a variation in the two-way ... modifications. The ACD achieved stable performance for various Sentinel-1 orbits/passes and maintained a stable performance for ...
Tópico(s): Landslides and related hazards
2022 - Elsevier BV | Remote Sensing of Environment
Md Yeasin, Dipanwita Haldar, Suresh Kumar, Ranjit Kumar Paul, Sonaka Ghosh,
... monitoring is a necessary action for precision agriculture. Sentinel-1 and Sentinel-2 satellites provide us with the ... study was to examine the potential of the Sentinel-1 and Sentinel-2 data and their combination for ... phenological stages and evaluate the temporal behaviour of Sentinel-1 parameters and Sentinel-2 indices. Seven machine learning ... districts of Hisar and Jind, Haryana, India. The Sentinel-1 backscatters and parameters VV, alpha and anisotropy and, ... 56 to 84% and 76 to 88% for Sentinel-1 data, Sentinel-2 data and combined data, respectively. ...
Tópico(s): Remote-Sensing Image Classification
2022 - Multidisciplinary Digital Publishing Institute | Remote Sensing
Shimelis Asfaw Wakigari, Robert Leconte,
... km. A suite of predictors derived from the Sentinel-1 C-band SAR and MODIS is used in ... 1) using predictors derived from the MODIS and Sentinel-1 along with other predictors such as elevation and ... predictors of the first experiment except for the Sentinel-1 predictors. Only dates when the Sentinel-1 images were available are considered for the comparison ... the two experiments indicates that the removal of Sentinel-1 predictors from the second experiment only reduces the ... surface albedo and API. On the contrary, the Sentinel-1 predictors play a less important role with no ...
Tópico(s): Synthetic Aperture Radar (SAR) Applications and Techniques
2022 - Multidisciplinary Digital Publishing Institute | Remote Sensing
Johannes Reiche, Eliakim Hamunyela, Jan Verbesselt, D.H. Hoekman, Martin Herold,
... cloud cover. In this context, the recently launched Sentinel-1 satellites promise unprecedented potential, because for the first ... in tropical dry forests, through the combination of Sentinel-1 C-band SAR time series with ALSO-2 ... as a result of high observation availability of Sentinel-1, deforestation events were detected more timely with Sentinel-1 than compared to Landsat and ALOS-2 PALSAR- ... average 7 days earlier than when using only Sentinel-1 observations, and six weeks earlier than when relying ...
Tópico(s): Remote Sensing and LiDAR Applications
2017 - Elsevier BV | Remote Sensing of Environment
Felix Greifeneder, Erick Khamala, Degelo Sendabo, Wolfgang Wagner, Marc Zebisch, Hussein Farah, Claudia Notarnicola,
... exploitation of high-resolution data is less mature. Sentinel-1 is a high-resolution Synthetic Aperture Radar (∼5 ... value. Herein lies one of the issues of Sentinel-1 based SMC mapping – at the time of writing, the Sentinel-1 time-series spanned a period of approximately 3. ... approach to overcome this problem and enable the Sentinel-1 based SMC anomaly detection. The method is based on a cross-calibration between Sentinel-1 SMC estimations and coarse resolution (∼30 km) modelled ... can derive the long-term averages for each Sentinel-1 pixel. Results show that the proposed method allows ...
Tópico(s): Landslides and related hazards
2018 - Elsevier BV | Physics and Chemistry of the Earth Parts A/B/C