Results 111 to 120 of about 120,225 (320)

Region-enhanced passive radar imaging [PDF]

, 2005
The authors adapt and apply a recently-developed region-enhanced synthetic aperture radar (SAR) image reconstruction technique to the problem of passive radar imaging.
Cetin, Mujdat, Lanterman, A.D., Çetin, Müjdat   +2 more
core   +1 more source

WFH: A Wideband Frequency Hopping‐Based Anti‐Jamming Navigation Signal Structure

IET Radar, Sonar &Navigation, Volume 20, Issue 1, January/December 2026.
Given the limitations of existing satellite navigation signals in antijamming performance amid growing environmental jamming, this paper proposes a navigation signal structure based on wideband frequency hopping (WFH) modulation to enhance both antijamming capability and measurement accuracy. It further introduces the nonstationary effective carrier‐to‐
Chenyang Wang, Yihai Liao, Sicong Liu, Jianghong Shi, Ao Peng   +4 more
wiley   +1 more source

C-SAR/02 Satellite Polarimetric Calibration and Validation Based on Active Radar Calibrators

Remote Sensing
Quad-polarization synthetic aperture radar (SAR) satellites are important detection tools in Earth observation and remote sensing; in particular, they are of great significance for accurately interpreting radar data and inverting geophysical parameters ...
Yanan Jiao, Fengli Zhang, Xiaochen Liu, Zhiwei Huang, Jingwen Yuan   +4 more
doaj   +1 more source

Talking About the Weather: The Feasibility of Using Very High‐Resolution Optical Satellite Imagery to Monitor Live and Stranded Cetaceans Around the UK and UK Overseas Territories

Marine Mammal Science, Volume 42, Issue 1, January 2026.
ABSTRACT Monitoring live and stranded cetaceans can be expensive and logistically challenging, resulting in knowledge gaps. Very high‐resolution (VHR) optical satellites are considered a potential solution to addressing some of these gaps. Despite success at detecting live and stranded cetaceans, satellites have only been trialed on restricted ...
Penny J. Clarke, Hannah C. Cubaynes, Jennifer A. Jackson, Nicola L. Taylor, David W. Johnston, Asha de Vos, Peter T. Fretwell, Aliaksandra Skachkova, Gwawr Jones   +8 more
wiley   +1 more source

A Review of Recent Development of Geosynchronous Synthetic Aperture Radar Technique

Remote Sensing
As the world’s first geosynchronous (GEO) orbit synthetic aperture radar (SAR) satellite, LuTan-4 was successfully launched on 13 August 2023. It was developed by the China Academy of Space Technology, with which the authors are affiliated.
Jinwei Li, Caipin Li, Xiaomin Tan, Dong You, Chongdi Duan, Sheng Zhang, Hongxing Dang, Guangting Li, Qingjun Zhang   +8 more
doaj   +1 more source

Parametric Sparse Representation and Its Applications to Radar Sensing

Leida xuebao, 2016
Sparse signal processing has been utilized to the area of radar sensing. Due to the presence of unknown factors such as the motion of the targets of interest and the error of the radar trajectory, a predesigned dictionary cannot provide the optimally ...
Li Gang, Xia Xiang-Gen
doaj   +1 more source

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

Study on the Characteristics of Surface Subsidence Induced by the Construction of a Subsurface Karst Tunnel Beneath an Airport

Advances in Civil Engineering, Volume 2026, Issue 1, 2026.
The tunnels in Southwest China are located in environmentally sensitive areas with intensive karst development and close proximity to airports. Surface subsidence in these regions poses serious risks to both tunnel construction safety and airport operational safety.
Yong Liu, Qifan Pei, Baisong Gao, Zhaoma Pan, Jinjing Yang, Hu Long, Chengke Ju, Xing Wang   +7 more
wiley   +1 more source

PATCH ANTENNA USING RECTANGULAR CENTRE SLOT AND CIRCULAR GROUND SLOT FOR CIRCULARLY POLARIZED SYNTHETIC APERTURE RADAR (CP-SAR) APPLICATION [PDF]

, 2017
Farohaji Kurniawan, Josaphat Tetuko Sri Sumantyo, Koichi Ito, Hiroaki Kuze, Steven Gao   +4 more
openalex   +1 more source

Monitoring Bridge Vibrations via Spaceborne SAR Micro‐Doppler

Structural Control and Health Monitoring, Volume 2026, Issue 1, 2026.
The advent of Synthetic Aperture Radar (SAR) imaging has presented the possibility of remote monitoring of civil infrastructure on a large scale. Although well established for observing slow and long‐term phenomena, its application to vibration‐based structural health monitoring (SHM) remains relatively unexplored in the current literature.
Alessandro Lotti, Aleksanteri B. Vattulainen, Sebastian Diaz Riofrio, Chiara Suppi, Enrico Tubaldi, Daniele Zonta, Pietro Milillo, Carmine Clemente, Lukasz Jankowski   +8 more
wiley   +1 more source