Results 31 to 40 of about 280 (161)
Ionospheric clutter mitigation using one-dimensional or two-dimensional wavelet processing [PDF]
, 2008 International audienceIonospheric clutter mitigation is an important issue for high-frequency surface wave radar (HFSWR) signal processing. Clutter results from a sky wave propagation mode, which is backscattered by ionospheric ionisation irregularities.
Hélier, Marc +2 more
core +1 more source
CLUSIM: A Synthetic Aperture Radar Clutter Simulator for Planetary Exploration [PDF]
, 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
Quality Control for Ocean Current Measurement Using High-Frequency Direction-Finding Radar
Remote 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]
Annales 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
Ship Echo Discrimination in HF Radar Sea-Clutter [PDF]
, 2003 International audienceHF radar can provide Over the Horizon detection of ships on very large oceanic areas, making use of the ionospheric refraction of radio waves. The Doppler spectrum of the sea clutter is composed of the first-order Bragg lines with a
Bourdillon, Alain +2 more
core +1 more source
Application of polarization ellipse technique for analysis of ULF magnetic fields from two distant stations in Koyna-Warna seismoactive region, West India [PDF]
Natural Hazards and Earth System Sciences, 2010 A new approach is developed to find the source azimuth of the ultra low frequency (ULF) electromagnetic (EM) signals believed to be emanating from well defined seismic zone.
F. Dudkin +5 more
doaj +1 more source
Journal of Geophysical Research: Earth Surface, Volume 131, Issue 7, July 2026.Abstract Understanding the basal conditions of East Antarctica's outlet glaciers is critical for accurately modeling future ice‐sheet evolution. Denman Glacier, one of the continent's fastest‐flowing glaciers, has been identified in bed‐topography models as occupying the deepest continental trough on Earth, potentially acting as a major outlet of the ...
Maria Constanza Manassero +8 more
wiley +1 more source
Signal Processing Methods to Improve Ocean Surface Wave Estimation from a High Frequency Surface Wave Radar [PDF]
, 2011 High frequency surface wave radars are operated as a remote sensor to measure ocean surface parameters to ranges exceeding 200-300 km from the coastline.
Wang, Wei
core
The Turbulence Properties of 150‐km Echoes in the Lower Ionosphere
Geophysical Research Letters, Volume 53, Issue 12, 28 June 2026.Abstract The valley region ionosphere spans from approximately 120–200 km in altitude, and hosts a wide range of plasma, neutral, and solar interactions that create and maintain the ionosphere. In this region a ubiquitous and mysterious source of radar echoes called “150‐km echoes” has been observed since the 1960s.
William J. Longley +3 more
wiley +1 more source
Journal of Geophysical Research: Space Physics, Volume 131, Issue 4, April 2026.Abstract Parker Solar Probe has been proven as instrumental for the observation of young solar wind. During the encounters E‐07 and E‐08, PSP recorded the core plus beaming protons crossing the heliospheric current Sheet region. When the observed PSP data is plotted in the temperature ratio versus parallel beta space, it is found that the occurrence ...
M. Rashid +10 more
wiley +1 more source