Results 51 to 60 of about 18,185 (247)

Proposed satellite position determination systems and techniques for Geostationary Synthetic Aperture Radar [PDF]

, 2016
This paper proposes two different calibration techniques for Geostationary Synthetic Aperture Radar (GEOSAR) missions requiring a high precision positioning, based on Active Radar Calibrators and Ground Based Interferometry.
Broquetas Ibars, Antoni, Casado Blanco, David, Fernández Usón, Marc, Martin Fuster, Roger   +3 more
core   +2 more sources

Few‐shot learning for satellite characterisation from synthetic inverse synthetic aperture radar images

IET Radar, Sonar & Navigation
Space situational awareness systems primarily focus on detecting and tracking space objects, providing crucial positional data. However, understanding the complex space domain requires characterising satellites, often involving estimation of bus and ...
Friso G. Heslinga, Faruk Uysal, Sabina B. vanRooij, Sven Berberich, Miguel Caro Cuenca   +4 more
doaj   +1 more source

Advancing Soil Organic Carbon Prediction: A Comprehensive Review of Technologies, AI, Process‐Based and Hybrid Modelling Approaches

Advanced Science, EarlyView.
This review highlights advances in soil organic carbon (SOC) quantification using remote sensing, proximal soil sensing, AI (ML and DL), and biogeochemical modelling. Integrating diverse data sources and models improves SOC prediction accuracy. Key priorities include enhancing data availability, refining models, incorporating microbial processes, and ...
Zijuan Ding, Ke Liu, Sabine Grunwald, Pete Smith, Philippe Ciais, Bin Wang, Alexandre M.J.‐C. Wadoux, Carla Ferreira, Senani Karunaratne, Narasinha Shurpali, Xiaogang Yin, Dale Roberts, Oli Madgett, Sam Duncan, Meixue Zhou, Zhangyong Liu, Matthew Tom Harrison   +16 more
wiley   +1 more source

Thermal Characterization of Ultrawide Bandgap Semiconductor Devices: A Review

Advanced Physics Research, EarlyView.
This review outlines advanced thermal characterization methods essential for ultrawide bandgap semiconductors like β‐Ga₂O₃, AlN, and diamond. It critically compares optical and electrical techniques, highlights their applications in power and RF systems, and evaluates recent innovations.
Hassan Irshad Bhatti, Xiaohang Li
wiley   +1 more source

Hyper-parameter selection in non-quadratic regularization-based radar image formation [PDF]

, 2008
We consider the problem of automatic parameter selection in regularization-based radar image formation techniques. It has previously been shown that non-quadratic regularization produces feature-enhanced radar images; can yield superresolution; is ...
Batu, Ozge, Batu, Özge, Cetin, Mujdat, Çetin, Müjdat   +3 more
core   +1 more source

Monitoring of a multi‐span prestressed concrete bridge using satellite interferometric data and comparison with on‐site sensor results

Structural Concrete, EarlyView.
Abstract Satellite‐based Synthetic Aperture Radar Interferometry (InSAR) represents a promising supplement to traditional Structural Health Monitoring (SHM) methods, offering a non‐invasive solution that eliminates the need for sensor installations and provides extensive spatial coverage.
Pier Francesco Giordano, Maciej Kwapisz, Andrea Miano, Riccardo Liuzzo, Alois Vorwagner, Maria Pina Limongelli, Andrea Prota, Marian Ralbovsky   +7 more
wiley   +1 more source

Pipelined digital SAR azimuth correlator using hybrid FFT-transversal filter [PDF]

, 1984
A synthetic aperture radar system (SAR) having a range correlator is provided with a hybrid azimuth correlator which utilizes a block-pipe-lined fast Fourier transform (FFT).
Liu, K. Y., Wu, C.
core   +1 more source

3D inverse synthetic aperture radar image quality improvement using sparse signal representation

IET Radar, Sonar & Navigation, 2023
Generalisation of one‐dimensional dictionary learning (1DDL) algorithms to Multidimensional (MD) mode and its utilisation in MD data applications, increases the speed and reduces the computational complexity.
Ali Mehrpooya, Seyed Mohammad Karbasi, Milad Nazari, Zahra Abbasi, Mohammad Mahdi Nayebi   +4 more
doaj   +1 more source

Species turnover and climates co‐dominate the carbon–water relationship in grasslands along an elevational gradient

Functional Ecology, EarlyView.
Read the free Plain Language Summary for this article on the Journal blog. Abstract Water use efficiency (WUE) serves as a core function reflecting vegetation–climate interactions and terrestrial carbon–water cycle. However, direct measurements of WUE are largely constrained to indoor experiments, individual plant and instantaneous physiological ...
Jiankun Bai, Matthew A. Sturchio, Yiqi Luo, Guanghui Lin, Xiaoli Cheng   +4 more
wiley   +1 more source

A nonquadratic regularization-based technique for joint SAR imaging and model error correction [PDF]

, 2008
Regularization based image reconstruction algorithms have successfully been applied to the synthetic aperture radar (SAR) imaging problem. Such algorithms assume that the mathematical model of the imaging system is perfectly known.
Cetin, Mujdat, Onhon, Ozben Naime, Çetin, Müjdat, Önhon, Özben Naime   +3 more
core   +1 more source