Results 31 to 40 of about 865,132 (377)
TomoSAR Mapping of 3D Forest Structure: Contributions of L-Band Configurations
Remote Sensing, 2021 Synthetic Aperture Radar (SAR) measurements are unique for mapping forest 3D structure and its changes in time. Tomographic SAR (TomoSAR) configurations exploit this potential by reconstructing the 3D radar reflectivity.
Matteo Pardini +2 more
doaj +1 more source
Antenna Array Calibration Using a Sparse Scene
IEEE Open Journal of Antennas and Propagation, 2021 In radar systems, antenna arrays acquire direction-dependent information to localize targets or create images of the environment. However, because of unknown complex amplitudes per channel and mutual coupling, a calibration is necessary for good ...
Johanna Geiss +3 more
doaj +1 more source
Radiometric Performance of the TerraSAR-X Mission over More Than Ten Years of Operation
Remote Sensing, 2018 The TerraSAR-X mission, based on two satellites, has produced SAR data products of high quality for a number of scientific and commercial applications for more than ten years.
Marco Schwerdt +8 more
doaj +1 more source
Statistical Regularization for Enhanced TomoSAR Imaging
IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, 2020 One of the main topics in synthetic aperture radar (SAR) tomography (TomoSAR) is the estimation of the vertical structures' location, which scatter the field back toward the sensor, constrained to a reduced number of passes. Moreover, the introduction of
Gustavo Martin del Campo +2 more
doaj +1 more source
High-Fidelity Trapped-Ion Quantum Logic Using Near-Field Microwaves. [PDF]
Physical Review Letters, 2016 We demonstrate a two-qubit logic gate driven by near-field microwaves in a room-temperature microfabricated surface ion trap. We introduce a dynamically decoupled gate method, which stabilizes the qubits against fluctuating energy shifts and avoids the ...
T. Harty +5 more
semanticscholar +1 more source
Model-Based Interpretation of PolSAR Data for the Characterization of Glacier Zones in Greenland
IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, 2021 Different approaches have been proposed in recent years to map glacier zones using Synthetic Aperture Radar (SAR). Most of them rely on empirical or statistical approaches for the interpretation of backscatter intensity measurements and their seasonal ...
Giuseppe Parrella +2 more
doaj +1 more source
Generating Multimode Entangled Microwaves with a Superconducting Parametric Cavity [PDF]
Physical Review Applied, 2017 In this Letter, we demonstrate the generation of multimode entangled states of propagating microwaves. The entangled states are generated by parametrically pumping a multimode superconducting cavity.
C. W. S. Chang +10 more
semanticscholar +1 more source
Huygens’ metasurfaces from microwaves to optics: a review
Nanophotonics, 2018 In this article, the basic principles and the main applications of Huygens’ metasurfaces (HMSs) are reviewed from microwaves to optics. In general, HMSs comprise a thin layer of orthogonal electric and magnetic dipoles, which form an array of Huygens ...
Michael Chen +3 more
semanticscholar +1 more source
Temporal and Spatial Analyses of Spectral Indices of Nonthermal Emissions Derived from Hard X-Rays and Microwaves [PDF]
, 2012 We studied electron spectral indices of nonthermal emissions seen in hard X-rays (HXRs) and in microwaves. We analyzed 12 flares observed by the Hard X-ray Telescope aboard {\it Yohkoh}, Nobeyama Radio Polarimeters (NoRP), and the Nobeyama ...
Asai, Ayumi +7 more
core +2 more sources
Microwaves Are Everywhere: “SMM: Nano-Microwaves” [PDF]
IEEE Journal of Microwaves, 2021 If the Twentieth Century boasted of the Space Age and the Computer Age, the Twenty-First Century is certainly starting off with the Age of Biology, or at least Biochemistry. The enormous impact of CRISPR (clustered regularly interspaced short palindromic repeats), LAMP (loop-mediated isothermal amplification), cryo-EM (electron microscopy), and many ...
openaire +2 more sources