Results 61 to 70 of about 631 (180)
Geophysical Research Letters, Volume 52, Issue 7, 16 April 2025.Abstract During the March equinox of 2023, a strong easterly wind of ∼80 m s−1 appeared at an altitude of ∼82 km in the equatorial upper mesosphere, which is regarded as an enhancement of the mesopause semi‐annual oscillation. In this study, a new reanalysis data available up to 110 km was used to investigate its momentum budget.
Kaoru Sato +9 more
wiley +1 more source
Earth and Space Science, Volume 12, Issue 1, January 2025.Abstract In response to the 2017 Decadal Survey, NASA conducted a five‐year study on the Surface Deformation and Change (SDC) designated observable to study potential mission concepts. As part of the SDC mission study, the Commercial Synthetic Aperture Radar (ComSAR) subgroup was tasked with evaluating the current landscape of the SAR and ...
Stacey A. Huang +9 more
wiley +1 more source
IET Communications, Volume 19, Issue 1, January/December 2025.A virtual array‐based method is proposed to jointly detect communication signals and estimate the starting position and cCFO. It constructs virtual arrays based on the linear phase characteristics of the training sequence regardless of the specific signal structure, which allows it a wide range of applications.
Xiaomao Cao +3 more
wiley +1 more source
An ISAR target motion estimation algorithm based on a differential semblance criterion
Electronics Letters, Volume 61, Issue 1, January/December 2025.This study presents a novel approach for improving rotational motion estimation in multistatic Inverse Synthetic Aperture Radar (ISAR) imaging through a Differential Semblance Optimization (DSO) criterion. By reducing discrepancies across images from multiple transmitter–receiver pairs, our method enables precise yaw rotation estimation and produces ...
D. P. Huxley +2 more
wiley +1 more source
Multistatic Synthetic Aperture Radar Autofocus for Back Projection Imaging of a Moving Target
Electronics Letters, Volume 61, Issue 1, January/December 2025.This paper presents a new metric‐based autofocus approach, called Localised Threshold Sharpness (LTS), which employs Multistatic SAR data to localise and focus a target moving with up to six degrees of freedom motion on a real‐time, pulse‐by‐pulse basis.
Anmol Rattan, Daniel Andre, Mark Finnis
wiley +1 more source
Sparse Array Configuration Optimization Based on Target Priors in Distributed ISAR Imaging
Electronics Letters, Volume 61, Issue 1, January/December 2025.In this letter, we consider the sparse array configuration optimization problem for distributed inverse synthetic aperture radar (ISAR) imaging of long‐range targets, aiming to suppress the strong grating lobes caused by sparse sampling. Particularly, we propose a distributed ISAR configuration optimization method, which constructs an equivalent ...
Siyu Zhao, Guangbin Zhang, Yan Wang
wiley +1 more source
IET Microwaves, Antennas &Propagation, Volume 19, Issue 1, January/December 2025.The article improves the battlefield survival capability of early warning aircraft by using direction finding deception technology on reconnaissance systems using frequency controlled array early warning aircraft. Abstract The Airborne Warning and Control System (AWACS) are pivotal assets in aerial operations, necessitating specialised protection ...
Bo Wang +4 more
wiley +1 more source
Modelling real‐world effects in near‐field SAR collections for compressive sensing
IET Radar, Sonar &Navigation, Volume 19, Issue 1, January/December 2025.This paper develops previously published work on using compressive sensing techniques to suppress sidelobes in SAR images to develop a higher‐fidelity measurement model. Using Cranfield University's GBSAR System a series, experimental measurements are conducted, and image estimation techniques are applied to this real data.
George A. J. Price +4 more
wiley +1 more source
Leida xuebao, 2014 The detection of multiple unresolved targets is critical in radar technology. To precisely detect multiple unresolved targets is a prerequisite and the basis of all other processes.
Min Tao, Wang Xiang, Xiao Shun-ping
doaj +1 more source
IET Radar, Sonar &Navigation, Volume 19, Issue 1, January/December 2025.
Hugh Griffiths, Alessio Balleri
wiley +1 more source