Results 51 to 60 of about 705,367 (158)

Progress and prospects based on Qujing incoherent scatter radar measurements

地球与行星物理论评
Herein, the technical characteristics and programme of Qujing incoherent scatter radar (the first one in China) are described. The measurement ability in the ionosphere, space debris, and the Moon was investigated using the data.
Jiansu Miao, Zonghua Ding, Liandong Dai, Song Yang, Jian Wu   +4 more
doaj   +1 more source

Measurement and Hybrid Modelling of Scattering Characteristics of Indoor Materials at 300 GHz

IET Microwaves, Antennas &Propagation, Volume 20, Issue 1, January/December 2026.
This article investigates the scattering characteristics of six common indoor materials (ceramic tile, wood plank, rough plasterboard, smooth plasterboard, bamboo‐wood fibre and aluminium alloy) at 300 GHz and identifies limitations in the classical Beckmann–Kirchhoff (B–K) model. To address these, a physics‐informed hybrid model integrating B–K theory
Jingyi Liang, Yuanjian Liu, Shuangde Li, Xu Zhang, Wei Cao   +4 more
wiley   +1 more source

Tropospheric Propagation Effects Extracted From ADS‐B Messages

Engineering Reports, Volume 7, Issue 12, December 2025.
This study explores the use of ADS‐B messages to estimate tropospheric effects, effectively isolating atmospheric influences from interference. The approach enables independent lower atmosphere studies and offers a cost‐free supplementary method for satellite applications, benefiting GNSS systems, especially at low elevation angles where multipath and ...
Alina‐Mihaela Badescu
wiley   +1 more source

Observations and modeling of UHF-band scintillation occurrence probability over the low-latitude region of China during the maximum activity of solar cycle 24 [PDF]

Annales Geophysicae, 2015
The climatological characteristics of UHF-band scintillations over the low-latitude region of China were investigated by analyzing the observations recorded at three stations of our regional network of satellite-beacon-based scintillation monitoring in
H. Zhang, H. Zhang, Y. Liu, J. Wu, T. Xu, D. Sheng   +5 more
doaj   +1 more source

Unusual SuperDARN Backscatter During the 11 May 2024 Geomagnetic Storm

Space Weather, Volume 23, Issue 12, December 2025.
Abstract A geomagnetic storm, one of the largest in this solar cycle, was launched on 10 May 2024, producing spectacular auroral displays that could be observed across the continental United States (US) at middle and low latitudes. In this study, we focus on a brief 20‐min interval during the peak of the storm when the Sym‐H index dropped to ∼ ${\sim} $
B. S. R. Kunduri, J. B. H. Baker, J. M. Ruohoniemi, J.‐P. St. Maurice, Y. Nishimura, P. J. Erickson, J. C. Foster, S. E. Milan, K. T. Sterne, E. G. Thomas   +9 more
wiley   +1 more source

A Novel Technique for High-Precision Ionospheric VTEC Estimation and Prediction at the Equatorial Ionization Anomaly Region: A Case Study over Haikou Station

Remote Sensing, 2023
This paper introduces a novel technique that uses observation data from GNSS to estimate the ionospheric vertical total electron content (VTEC) using the Kriging–Kalman method.
Hai-Ning Wang, Qing-Lin Zhu, Xiang Dong, Dong-Sheng Sheng, Yong-Feng Zhi, Chen Zhou, Bin Xu   +6 more
doaj   +1 more source

A novel method to assess the infiltration and filtration functions of urban soils

Vadose Zone Journal, Volume 24, Issue 6, November/December 2025.
Abstract Urban areas are increasingly under pressure due to rapid expansion and extreme rainfall events driven by climate change. Rather than relying solely on pipes to regulate stormwater, new management systems promote direct infiltration of water and pollutants into the soil.
Gersende Fernandes, Simone Di Prima, Gislain Lipeme Kouyi, Tim D. Fletcher, Daniel Donze, Robert James, Saint‐Martin Saint‐Louis, Matteo Martini, Claudia Nicklason, Laurent Lassabatere   +9 more
wiley   +1 more source

Simultaneous Observation of Duskside and Dawnside Subauroral Polarization Streams During an Intense Magnetic Storm

Geophysical Research Letters, Volume 52, Issue 17, 16 September 2025.
Abstract The duskside and dawnside subauroral polarization streams (SAPS) refer to high‐velocity westward and eastward plasma flows located equatorward of the auroral oval. While extensive research has focused on the duskside SAPS, the simultaneous evolution of both dawnside and duskside SAPS remains unreported.
Bianlong Zhao, Jiaojiao Zhang, Qinghe Zhang, Wei Wang, Zanyang Xing, L. R. Lyons, Y. Nishimura, Kjellmar Oksavik, Xiangyu Wang, Hang Li, Yuzhang Ma, Yong Wang, Duan Zhang, Chi Wang, Xiang Deng, Ailan Lan, Jingye Yan, J. Michael Ruohoniemi, Nozomu Nishitani, Simon G. Shepherd, Tong Xu, Shuji Sun   +21 more
wiley   +1 more source

Capability of Revised Intensity and Impulsive Strength of Geomagnetic Storms and Activities to Identify Severe Space Weather

Space Weather, Volume 23, Issue 7, July 2025.
Abstract The treatment of geomagnetic storms is revised recently by including the missed early positive part of main phase MP (or positive MPO) in the treatment. The present paper studies the capability of the revised intensity (SYM‐HMinr, Kpmax and AEmax) and revised impulsive strength (IpsSYM‐Hr, IpsKp and IpsAE) of the storms/activities in low, mid ...
Jijin K. Raj, V. Manu, N. Balan, Qing‐He Zhang, Zan‐Yang Xing   +4 more
wiley   +1 more source

Prediction of radiowave propagation in urban microcell environments using ray tracing methods

, 1995
Microcells have potential use in providing high-capacity cellular radio systems. Theoretical models using the ray tracing method were therefore attempted to be developed for predicting radiowave propagation in microcells, in urban environments.
Brown, P.G., Constantinou, C.C.; id_orcid   +1 more
core   +3 more sources