Results 1 to 10 of about 44,647 (238)

Integrating UAS-Based GNSS-R, LiDAR, and Multispectral Data for Soil Moisture Estimation: Summary of Results From a Three-Year-Long Field Campaign

IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing
Accurate and high-resolution soil moisture (SM) measurement is a critical component for site-specific precision agriculture (PA) management. Efficiently observing SM at high resolution on a subfield scale can enhance irrigation planning and management ...
Md Mehedi Farhad, Volkan Senyurek, Mohammad Abdus Shahid Rafi, Sriman Bidhan Baray, Cary McCraine, Lee A. Hathcock, Ardeshir Adeli, Huang Yanbo, Ali C. Gurbuz, Mehmet Kurum   +9 more
doaj   +1 more source

Trojan-horse attacks threaten the security of practical quantum cryptography

New Journal of Physics, 2014
A quantum key distribution (QKD) system may be probed by an eavesdropper Eve by sending in bright light from the quantum channel and analyzing the back-reflections. We propose and experimentally demonstrate a setup for mounting such a Trojan-horse attack.
Nitin Jain, Elena Anisimova, Imran Khan, Vadim Makarov, Christoph Marquardt, Gerd Leuchs   +5 more
doaj   +1 more source

UAV-Based GNSS-R for Water Detection as a Support to Flood Monitoring Operations: A Feasibility Study

Applied Sciences, 2019
Signals from global navigation satellite systems (GNSS) can be utilized as signals of opportunity in remote sensing applications. Geophysical properties of the earth surface can be detected and monitored by processing the back-scattered GNSS signals from
Rayan Imam, Marco Pini, Gianluca Marucco, Fabrizio Dominici, Fabio Dovis   +4 more
doaj   +1 more source

Gate reflectometry in dense quantum dot arrays

New Journal of Physics, 2023
Silicon quantum devices are maturing from academic single- and two-qubit devices to industrially-fabricated dense quantum-dot (QD) arrays, increasing operational complexity and the need for better pulsed-gate and readout techniques.
Fabio Ansaloni, Heorhii Bohuslavskyi, Federico Fedele, Torbjørn Rasmussen, Bertram Brovang, Fabrizio Berritta, Amber Heskes, Jing Li, Louis Hutin, Benjamin Venitucci, Benoit Bertrand, Maud Vinet, Yann-Michel Niquet, Anasua Chatterjee, Ferdinand Kuemmeth   +14 more
doaj   +1 more source

Clamshell Inductive Current Coupler for Online Cable Condition Monitoring

IEEE Open Journal of Instrumentation and Measurement
This document describes the adaptation of a clamshell inductive current coupler for online reflectometry testing (both frequency-domain reflectometry and spread spectrum time-domain reflectometry) to evaluate cable anomalies.
Samuel W. Glass, Jonathan R. Tedeschi, Muthu Elen, Mychal P. Spencer, Jiyoung Son, Leo S. Fifield   +5 more
doaj   +1 more source

GNSS Transpolar Earth Reflectometry exploriNg System (G-TERN): Mission Concept

IEEE Access, 2018
The global navigation satellite system (GNSS) Transpolar Earth Reflectometry exploriNg system (G-TERN) was proposed in response to ESA’s Earth Explorer 9 revised call by a team of 33 multi-disciplinary scientists.
Estel Cardellach, Jens Wickert, Rens Baggen, Javier Benito, Adriano Camps, Nuno Catarino, Bertrand Chapron, Andreas Dielacher, Fran Fabra, Greg Flato, Heinrich Fragner, Carolina Gabarro, Christine Gommenginger, Christian Haas, Sean Healy, Manuel Hernandez-Pajares, Per Hoeg, Adrian Jaggi, Juha Kainulainen, Shfaqat Abbas Khan, Norbert M. K. Lemke, Weiqiang Li, Son V. Nghiem, Nazzareno Pierdicca, Marcos Portabella, Kimmo Rautiainen, Antonio Rius, Ingo Sasgen, Maximilian Semmling, C. K. Shum, Francois Soulat, Andrea K. Steiner, Sebastien Tailhades, Maik Thomas, Roger Vilaseca, Cinzia Zuffada   +35 more
doaj   +1 more source

Rationale of GNSS Reflected Delay–Doppler Map (DDM) Distortions Induced by Specular Point Inaccuracies

IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, 2020
Global navigation satellite system reflectometry (GNSS-R)-derived winds from the cyclone GNSS (CYGNSS) satellite constellation are expected to significantly improve weather forecasts in the tropical region.
Giuseppe Grieco, Ad Stoffelen, Marcos Portabella   +2 more
doaj   +1 more source

Influência do tipo de amostragem na constante dielétrica do solo e na calibração de sondas de TDR Influence of sampling type on the dielectric constant and calibration of TDR probes

Revista Brasileira de Ciência do Solo, 2010
A técnica da TDR é uma importante ferramenta para o estudo do teor de água no solo. Para o correto emprego dessa técnica, é necessário calibrar modelos que relacionam o conteúdo volumétrico de água no solo com a constante dielétrica deste, considerando ...
Marcelo Rocha dos Santos, João Henrique Zonta, Mauro Aparecido Martinez   +2 more
doaj   +1 more source

Polarized Bidirectional Reflectance Distribution Function Matrix Derived from Two-Scale Roughness Theory and Its Applications in Active Remote Sensing

Remote Sensing
A polarized bidirectional reflectance distribution function (pBRDF) matrix was developed based on the two-scale roughness theory to provide consistent simulations of fully polarized microwave emission and scattering, required for the ocean–atmosphere ...
Lingli He, Fuzhong Weng, Jinghan Wen, Tong Jia   +3 more
doaj   +1 more source

Magnetic reflectometry of heterostructures

Journal of Physics: Condensed Matter, 2014
Measuring the magnetic configuration at complex buried layers and interfaces is an important task, which requires especially a non-destructive probing technique. X-ray resonant magnetic reflectometry (XRMR) combines the non-destructive depth profiling potential of x-ray reflectometry with the excellent sensitivity for magnetic phenomena, utilizing the ...
Macke, S., Goering, E.
openaire   +3 more sources