Results 71 to 80 of about 80,473 (247)

Autofocus approach for sparse aperture inverse synthetic aperture radar imaging

Electronics Letters, 2015
In the inverse synthetic aperture radar imaging, the autofocus is a required step for generating high‐quality images. However, due to many factors, the aperture data may be sparse so that the classical motion compensation approaches and imaging algorithms are not proper. On the basis of the compressed sensing technique and two optimisation methods (the
Jianjun Gao, Fulin Su, Da Xiao
openaire   +2 more sources

Toward an optimal inversion method for synthetic aperture radar wind retrieval [PDF]

Journal of Geophysical Research: Oceans, 2002
In recent years, particular efforts have been made to derive wind fields over the oceans from synthetic aperture radar (SAR) images. In contrast with the scatterometer, the SAR has a higher spatial resolution and therefore has the potential to provide higher resolution wind information.
Portabella, M., Stoffelen, A., Johannessen, Johnny A.   +2 more
openaire   +4 more sources

Enhanced Meteoroid Trajectory and Speed Reconstruction Using a Forward Scatter Radio Network: Pre‐t0 ${t}_{0}$ Phase Technique and Uncertainty Analysis

Radio Science, Volume 60, Issue 8, August 2025.
Abstract This study presents an enhanced method for reconstructing meteoroid trajectories and speeds using the Belgian RAdio Meteor Stations forward scatter radio network. A novel extension of the pre‐t0 ${t}_{0}$ phase technique, originally developed for backscatter radars, has been adapted for forward scatter continuous wave systems.
Joachim Balis, Hervé Lamy, Michel Anciaux, Emmanuel Jehin, Johan De Keyser, Daniel Kastinen, Peter G. Brown   +6 more
wiley   +1 more source

Consistent Cumulative Slip Rates but Shifting Fault Strand Activity in the Xiaojiang Fault Zone, Southeastern Tibetan Plateau, Across Decadal and Millennial Timescales

Tectonics, Volume 44, Issue 8, August 2025.
Abstract Understanding slip partitioning and its temporal variations across fault zones is critical for evaluating crustal kinematics, geodynamics and associated seismic hazards. However, studies examining slip‐rate variations across different timescales remain limited.
Zhuona Bai, Xuhua Shi, Hanlin Chen, Yuanhai Shu, Jinhan Wang, Xin Liu, Chenchao Xu, George Hilley   +7 more
wiley   +1 more source

Sparse representation-based SAR imaging [PDF]

, 2009
There is increasing interest in using synthetic aperture radar (SAR) images in automated target recognition and decision-making tasks. The success of such tasks depends on how well the reconstructed SAR images exhibit certain features of the underlying ...
Cetin, Mujdat, Masnadi-Shirazi, Mohammad Ali, Samadi, Sadegh, Çetin, Müjdat   +3 more
core   +1 more source

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

Functional Ecology, Volume 39, Issue 8, Page 2123-2134, August 2025.
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

3D Volumetric Strain Distribution of the Cerro Prieto Geothermal Field Inferred From Inverse Modeling of InSAR and Leveling Data

Geophysical Research Letters, Volume 52, Issue 13, 16 July 2025.
Abstract Advanced Interferometric Synthetic Aperture Radar (InSAR) data has led to an extensive observation of Earth's surface displacements. Whereas the combined use of high‐resolution InSAR, leveling and GPS data may enable highly detailed three‐dimensional deformation models, publicly available modeling and inversion algorithms either seek a single ...
Luis A. Gallardo, Olga Sarychikhina, Ewa Glowacka, Braulio Robles   +3 more
wiley   +1 more source

2-D Coherence Factor for Sidelobe and Ghost Suppressions in Radar Imaging [PDF]

, 1956
The coherence factor (CF) is defined as the ratio of coherent power to incoherent power received by the radar aperture. The incoherent power is computed by the multi-antenna receiver based on only the spatial variable.
Li, Shiyong, Amin, Moeness, An, Qiang, Zhao, Guoqiang, Sun, Houjun   +4 more
core   +3 more sources

Modelling of the Seasonal Snow Cover Dynamics for Open and Forested Areas in the Berchtesgaden National Park (Germany) Using the openAMUNDSEN Mountain Snow Cover Model

Hydrological Processes, Volume 39, Issue 7, July 2025.
We capture the snow cover variability in Berchtesgaden National Park (Bavaria, Germany) depending on topography, snow‐canopy processes, and differences between snow‐poor and snow‐rich winters by means of distributed simulations. Our results point out that snow cover duration and snow disappearance day are highly variable in time and space and that snow
Brage Storebakken, Erwin Rottler, Michael Warscher, Ulrich Strasser   +3 more
wiley   +1 more source

Three‐dimensional point cloud reconstruction of inverse synthetic aperture radar image sequences based on back projection and iterative closest point fusion [PDF]

, 2022
Yu Wang, Shuai Li, Tingting He, Biao Tian, Zengping Chen   +4 more
openalex   +1 more source