Results 1 to 10 of about 145,203 (267)

Imaging ionospheric inhomogeneities using spaceborne synthetic aperture radar [PDF]

, 2011
We present a technique and results of 2-D imaging of Faraday rotation and total electron content using spaceborne L band polarimetric synthetic aperture radar (PolSAR).
Chapman, B., Freeman, A., Li, Z., Pi, X., Rosen, P.   +4 more
core   +2 more sources

Bayesian off-line detection of multiple change-points corrupted by multiplicative noise : application to SAR image edge detection [PDF]

, 2003
This paper addresses the problem of Bayesian off-line change-point detection in synthetic aperture radar images. The minimum mean square error and maximum a posteriori estimators of the changepoint positions are studied.
Andre-Obrecht, Basseville, Bernardo, Bovik, Bretthorst, Carlin, Chib, Chib, Cinlar, Curlander, Delyon, Djuric, Fjφrtoft, Frost, Geman, Geyer, Gilks, Godsill, Green, Gustafsson, Kelly, Lavielle, Lavielle, McCulloch, McCulloch, Oliver, Phillips, Robert, Robert, Ruanaidh, Sadler, Stephens, Stephens, Swami, Tierney, Touzi, Van Trees, Vincent, Willsky, Winkler   +39 more
core   +2 more sources

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

Detection and Quantification of Over‐Humidification in Polymer Electrolyte Fuel Cells: Insights into Simulation, Imaging, and Sensors

Advanced Energy and Sustainability Research, EarlyView.
This review highlights advanced methods for detecting and managing over‐humidification in polymer electrolyte fuel cells (PEFCs), emphasizing innovative sensors, simulation techniques, and imaging methods. By addressing the impact of water management on fuel‐cell performance and durability, this study outlines practical and sustainable solutions for ...
Maximilian Käfer, Viktor Hacker, Merit Bodner   +2 more
wiley   +1 more source

Multiple feature-enhanced synthetic aperture radar imaging [PDF]

, 2009
Non-quadratic regularization based image formation is a recently proposed framework for feature-enhanced radar imaging. Specific image formation techniques in this framework have so far focused on enhancing one type of feature, such as strong point ...
Cetin, Mujdat, Masnadi-Shirazi, Mohammad Ali, Samadi, Sadegh, Çetin, Müjdat   +3 more
core   +1 more source

A Survey of Phase Shifters for Microwave Phased Array Systems

International Journal of Circuit Theory and Applications, EarlyView.
ABSTRACT Phased Array Systems (PASs) are extensively used in radar and telecommunication systems for diverse applications, including military surveillance and wireless broadband communication. Besides, they are becoming increasingly indispensable in modern applications such as multi‐function phased array radars for weather monitoring and aircraft ...
M. Kebe, M. C. E. Yagoub, R. E. Amaya
wiley   +1 more source

Synthetic aperture radar target simulator [PDF]

, 1984
A simulator for simulating the radar return, or echo, from a target seen by a SAR antenna mounted on a platform moving with respect to the target is described.
Bickler, T. C., Goldstein, R. M., Held, D. N., Zebker, H. A.   +3 more
core   +1 more source

Recommendations for built marine infrastructure that supports natural habitats

Frontiers in Ecology and the Environment, EarlyView.
The extent of built marine infrastructure—from energy infrastructure and ports to artificial reefs and aquaculture—is increasing globally. The rise in built structure coverage is concurrent with losses and degradation of many natural habitats. Although historically associated with net negative impacts on natural systems, built infrastructure—with ...
Avery B Paxton, Sarah E Lester, Carter S Smith, Siddharth Narayan, Christine Angelini, Brendan J Runde, Megan I Saunders, Rachel K Gittman, Jacob Allgeier, Maria L Vozzo, D'amy N Steward, Hayley R Lemoine, Stephanie R Valdez, Rebecca L Morris, Douglas P Nowacek, William Seaman, Patrick N Halpin, Brian R Silliman   +17 more
wiley   +1 more source

Anthromes and forest carbon responses to global change

PLANTS, PEOPLE, PLANET, EarlyView.
Forest ecosystems absorb and store about 25% of global carbon dioxide emissions annually and are increasingly shaped by human land use and management. Climate change interacts with land use and forest dynamics to influence observed carbon stocks and the strength of the land carbon sink.
J. Aaron Hogan, Jeremy W. Lichstein, Eileen H. Helmer, Matthew E. Craig, Evan Fricke, Viola Henrich, Steven A. Kannenberg, Charles D. Koven, Kees Klein Goldewjik, David M. Lapola, Yue Li, Yadvinder Malhi, John Quinn, Stephanie Roe, Cesar Terrer, Emilio Vilanova, Anthony P. Walker, Kai Zhu, Erle C. Ellis   +18 more
wiley   +1 more source

Servomechanism for Doppler shift compensation in optical correlator for synthetic aperture radar [PDF]

, 1980
A method and apparatus for correcting Doppler shifts in synthetic aperture radar data is described. An optical correlator for synthetic aperture radar data has a means for directing a laser beam at a signal film having radar return pulse intensity ...
Bicknell, T. J., Constaninides, N. J.
core   +1 more source