Results 31 to 40 of about 20,649 (261)

Preliminary Evaluation of Sentinel-1A Wind Speed Retrievals

IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, 2016
The accuracy of wind speed retrievals from synthetic aperture radars (SARs) is strongly dependent upon the accuracy of the normalized radar cross section measurement. Here, we make a preliminary assessment of wind speed retrievals from Sentinel-1A. In particular, we use Sentinel-1A SAR imagery to compute wind speed at 500-m resolution.
Frank M. Monaldo, Christopher R. Jackson, Xiaofeng Li 0001, William G. Pichel   +3 more
openaire   +1 more source

Sentinel-1A: Analysis of FDBAQ Performance on Real Data

IEEE Transactions on Geoscience and Remote Sensing, 2015
This paper concerns the performance of the flexible dynamic block adaptive quantizer (FDBAQ), which is the onboard data compression scheme used by Sentinel-1 (S-1), i.e., the C-band synthetic aperture radar (SAR) constellation whose first satellite (Sentinel-1A) has been launched on April 3, 2014. The data rate that results from the fine resolution and
Pietro Guccione, Michele Belotti, Davide Giudici, Andrea Monti-Guarnieri, Ignacio Navas Traver   +4 more
openaire   +1 more source

Assessment of Ocean Swell Height Observations from Sentinel-1A/B Wave Mode against Buoy In Situ and Modeling Hindcasts

Remote Sensing, 2022
Synthetic Aperture Radar (SAR) in wave mode is a powerful tool for monitoring sea states in terms of long-period ocean swells of a specific wave directional partition. Since 2016, SARs aboard Sentinel-1A/B operating in wave mode have provided ocean swell
He Wang, Alexis Mouche, Romain Husson, Antoine Grouazel, Bertrand Chapron, Jingsong Yang   +5 more
doaj   +1 more source

First Assessment of Sentinel-1A Data for Surface Soil Moisture Estimations Using a Coupled Water Cloud Model and Advanced Integral Equation Model over the Tibetan Plateau

Remote Sensing, 2017
The spatiotemporal distribution of soil moisture over the Tibetan Plateau is important for understanding the regional water cycle and climate change.
Xiaojing Bai, Binbin He, Xing Li, Jiangyuan Zeng, Xin Wang, Zuoliang Wang, Yijian Zeng, Zhongbo Su   +7 more
doaj   +1 more source

Machine Learning Model to Predict Manganese Micronutrient Content in Oil Palm Plantation Soil Using Sentinel 1A and Sentinel 2A Image Integration

JOIV: International Journal on Informatics Visualization
This study aims to predict manganese micronutrients in oil palm plantation soil using machine learning. Materials and technological tools use remote sensing with the integration of Sentinel 1A and Sentinel 2A satellites for monitoring micronutrients in ...
- Suhendi, Kudang Boro Seminar, - Sudradjat, - Liyantono, Sirojul Munir, Fatimah Az Zahra   +5 more
doaj   +1 more source

Soil Moisture Mapping Using Sentinel-1A Synthetic Aperture Radar Data

International Journal of Environment and Geoinformatics, 2018
The aim of this study is to estimate and map soil moisture distribution using C-band Synthetic Aperture Radar (SAR) data. Sentinel-1A is a new generation C-band SAR satellite, and in this study Sentinel-1A data acquired on 24 April 2016 were used to ...
Aliihsan Şekertekin, Aycan Murat Marangoz, Saygın Abdikan   +2 more
doaj   +1 more source

Monitoring Deformasi Gunung Merapi Menggunakan Citra Sentinel-1A Dengan Menggunakan Metode DInSAR (Studi Kasus: Gunung Merapi, Jawa Tengah)

Rekayasa Hijau: Jurnal Teknologi Ramah Lingkungan, 2020
ABSTRAK Indonesia mempunyai 127 gunung api aktif yang tersebar dari Sabang sampai Merauke. Oleh karena itu, perlu adanya pemantauan aktivitas gunung api yang dapat digunakan untuk acuan mitigasi bencana.
Rian Nurtyawan, Lady Suci Utami
doaj   +1 more source

Radiometric accuracy and stability of sentinel-1A determined using point targets [PDF]

International Journal of Microwave and Wireless Technologies, 2018
ABSTRACTSentinel-1A is a space-borne synthetic aperture radar (SAR) system developed in the frame of the Copernicus Program. The German Aerospace Center supported the radiometric and polarimetric calibration of Sentinel-1A by the analysis of point target responses of several acquisitions considering different modes, beams, and polarization channels. An
Schmidt, Kersten, Tous Ramon, Núria, Schwerdt, Marco   +2 more
openaire   +2 more sources

Nanoplatforms for Sentinel and Tumor‐Draining Lymph Node Mapping: From Visualization to Pathway‐Informed Staging

Advanced Healthcare Materials, EarlyView.
Lymphotropic nanoplatforms integrate multimodal imaging with therapeutic guidance to map sentinel and tumor‐draining lymph nodes, revealing functional drainage, metastatic involvement, and nodal accessibility, while providing mechanistic insight to support precision surgical and therapeutic interventions.
Xu Chen, Nina Li, Meiyan Zou, Zihao Zhou, Rongwei Xu, Weiyao Feng, Xinyuan Zhao, Li Cui   +7 more
wiley   +1 more source

Verifying the Geometric Accuracy of Sentinel-1A and Sentinel-1B using L0Products [PDF]

12th European Conference on Antennas and Propagation (EuCAP 2018), 2018
The geometric accuracy of Sentinel-1 is usally derived from level-1 products in Stripmap mode using accurate surveyed corner reflector positions. While the range offset is found to be low (~30 cm) an azimuth offset of about 2 m remains. The study investigates the reason for the geometric offsets by deriving the geometric parameters from L0-data ...
Schmidt, Kersten, Tous Ramon, Núria, Reimann, Jens, Schwerdt, Marco   +3 more
openaire   +2 more sources