Results 61 to 70 of about 4,630 (180)
Assessing GNSS Reflectometry for High‐Latitude 3D Ionospheric Imaging
Journal of Geophysical Research: Space Physics, Volume 131, Issue 8, August 2026.Abstract This study investigates whether Global Navigation Satellite System Reflectometry (GNSS‐R) measurements from low‐Earth‐orbit (LEO) satellites can improve three‐dimensional (3D) ionospheric electron density imaging, with a focus on high‐latitude regions. Conventional ionospheric tomography is limited by sparse ground‐based receiver coverage over
Brenna Royersmith +2 more
wiley +1 more source
An Ionospheric Storm Scale Index Based on TEC: Comparative Analysis for China Region
Space Weather, Volume 24, Issue 8, August 2026.Abstract Defining a standardized ionospheric storm scale is challenging given the ionosphere's inherent complexity and susceptibility to multiple driving factors. In this study, a novel ionospheric storm scale (ISS) index is developed based on statistical analysis of total electron content (TEC) data from 257 ground‐based GNSS stations across China ...
Shuangshuang Shi +8 more
wiley +1 more source
Modified Multi-Mode Target Tracker for High-Frequency Surface Wave Radar
Remote Sensing, 2018 In high-frequency surface wave radar (HFSWR), part of the radiation signal inevitably propagates upward and illuminates the target through the ionosphere due to the poor controllability of the antenna’s vertical pattern.
Mengxiao Zhao, Xin Zhang, Qiang Yang
doaj +1 more source
Space Weather, Volume 24, Issue 8, August 2026.Abstract This study uses observation data from multi‐constellation (GPS/GLONASS/Galileo/BeiDou) ground‐based Global Navigation Satellite Systems (GNSS) networks and a non‐integrated spherical harmonic function modeling methodology to develop an ionospheric Total Electron Content (TEC) model with high spatiotemporal resolution (1° × 1° in longitude and ...
Heng Xu +5 more
wiley +1 more source
Geophysical Research Letters, Volume 53, Issue 14, 28 July 2026.Abstract To explore mechanisms of rupture segmentation, we invert coseismic GNSS offsets for the 2025 Mw 7.6 Aomori, Japan earthquake. Our preferred curved‐fault solution images a compact thrust rupture at 25–50 km depth with peak slip ∼2.5 m near 35 km.
Xiaolong Zhang +6 more
wiley +1 more source
An extension of the RiMAX multipath estimation algorithm for ultra-wideband channel modeling
EURASIP Journal on Wireless Communications and Networking, 2018 This work presents an extension of the high-resolution RiMAX multipath estimation algorithm, enabling the analysis of frequency-dependent propagation parameters for ultra-wideband (UWB) channel modeling. Since RiMAX is a narrowband algorithm, it does not
Brecht Hanssens +7 more
doaj +1 more source
Geophysical Research Letters, Volume 53, Issue 14, 28 July 2026.Abstract We present conjugate observations of ionospheric small‐scale magnetic perturbations (dB) $(dB)$ and GPS scintillations from the Tandem Reconnection and Cusp Electrodynamics Reconnaissance Satellites (TRACERS) and the Canadian High Arctic Ionospheric Network (CHAIN) during a storm‐time substorm on 9 August 2025 in the nightside auroral region ...
Yangyang Shen +12 more
wiley +1 more source
Radio Channel Capacity with Directivity Control of Antenna Beams in Multipath Propagation Environment. [PDF]
Sensors (Basel), 2021 Ziółkowski C +4 more
europepmc +1 more source
IEEE AccessUnderwater wireless communication remains a challenging topic, particularly for applications such as wreck penetration where multipath and Doppler effects are very intense.
Agnieszka Czapiewska +4 more
doaj +1 more source
Alternative Approach for Combination of Fingers in Underwater Acoustic Communication
International Journal of Distributed Sensor Networks, 2016 An underwater acoustic communication channel is time varying and has multipath propagation with bottom and surface reflection. A rake receiver has time diversity effects in multipath propagation environments.
Ji-Hong Son +4 more
doaj +1 more source