Results 21 to 30 of about 67,451 (128)

A Modified PGA for Spaceborne SAR Scintillation Compensation Based on the Weighted Maximum Likelihood Estimator and Data Division

open access: yesIEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, 2022
The P-band spaceborne synthetic aperture radar (SAR) is significantly affected by ionospheric scintillation. Although the traditional phase gradient autofocus (PGA) can estimate and compensate for the scintillation phase of the single-polarization SAR ...
Hongcheng Zeng   +3 more
doaj   +1 more source

Overview of ionosphere clutter suppression for high frequency surface wave radar (HFSWR) system: Observation, approaches, challenges and open issue

open access: yesIET Radar, Sonar & Navigation, 2023
A great interest has been directed towards high frequency surface wave radar (HFSWR), because it is applied as long‐range early warning and real‐time measurements of sea surface condition tools in maritime surveillance.
Xiaowei Ji   +3 more
doaj   +1 more source

A Comparative Study on Radio Frequency Interference Suppression and foF2 Scaling for Ionograms

open access: yesRemote Sensing, 2023
In this paper, we compare the performances of radio frequency interference (RFI) suppression between radio frequency interference mitigation (RFIM) and frequency-domain adaptive clutter suppression (FACS) algorithms that apply to ionograms for foF2 ...
Zhao-Yu Chen   +6 more
doaj   +1 more source

CLUSIM: A Synthetic Aperture Radar Clutter Simulator for Planetary Exploration [PDF]

open access: yes, 2017
In this paper we present the CLUtter SIMulator (CLUSIM), a special program simulating radar side echoes from rough planetary surfaces using realistic topography data sets.
B. Sánchez-Cano (7665515)   +3 more
core   +4 more sources

the plot, the clutter, the sampling and its lens: occlusion measures for automatic clutter reduction [PDF]

open access: yes, 2006
Previous work has demonstrated the use of random sampling in visualising large data sets and the practicality of a sampling lens in enabling focus+context viewing.
Dix, Alan, Ellis, G.
core   +3 more sources

Space‐time adaptive processing algorithm based on hyper beamforming for ionospheric clutter suppression in small‐array high‐frequency surface wave radar

open access: yesIET Radar, Sonar & Navigation, 2023
Small‐array high‐frequency surface wave radar (HFSWR) is widely used to monitor maritime targets as it can be used to save on‐land resources. In small‐array HFSWR systems, the main lobe of the receiving angle spectrum is significantly broadened.
Jiaming Li, Qiang Yang, Xin Zhang
doaj   +1 more source

Quality Control for Ocean Current Measurement Using High-Frequency Direction-Finding Radar

open access: yesRemote Sensing, 2023
High-frequency radars (HFRs) are important for remote sensing of the marine environment due to their ability to provide real-time, wide-coverage, and high-resolution measurements of the ocean surface current, wave height, and wind speed.
Shuqin He   +6 more
doaj   +1 more source

Fast comparison of IS radar code sequences for lag profile inversion [PDF]

open access: yesAnnales Geophysicae, 2008
A fast method for theoretically comparing the posteriori variances produced by different phase code sequences in incoherent scatter radar (ISR) experiments is introduced.
M. S. Lehtinen   +2 more
doaj   +1 more source

Modeling and Simulation Challenges in Wide Ocean Area Surveillance

open access: yesIEEE Access, 2019
Wide ocean area surveillance using high frequency surface wave radar(s) is discussed in this paper. Theoretical and practical issues and problems are reviewed.
Levent Sevgi
doaj   +1 more source

An Orthogonal Projection Algorithm to Suppress Interference in High-Frequency Surface Wave Radar

open access: yesRemote Sensing, 2018
High-frequency surface wave radar (HFSWR) has been widely applied in sea-state monitoring, and its performance is known to suffer from various unwanted interferences and clutters.
Zezong Chen, Fei Xie, Chen Zhao, Chao He
doaj   +1 more source

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