Results 71 to 80 of about 1,405 (223)

Study on the Detectability of the Sky-Surface Wave Hybrid Radar

Journal of Applied Mathematics, 2014
Working in the HF (high-frequency) band and the transmitter and receiver locating separately, the sky-surface wave hybrid radar both has the capabilities of the OTHR (over-the-horizon radar) and the advantage of the bistatic radar. As the electromagnetic
Hou Chengyu, Ke Guo, Shi Tiange, Wang Yuxin   +3 more
doaj   +1 more source

OTHR-10. COLLABORATIVE EFFORTS FOR HOSPITAL-BASED BIOBANK DEVELOPMENT AND OPTIMIZATION TO ENSURE QUALITY PEDIATRIC SPECIMENS FOR TRANSLATIONAL RESEARCH [PDF]

, 2023
Brittany Lebert, Maxine N. Gonzalez-Vega, Samer K. Elbabaa, Julia Hegert, Avery Wright, Ana Aguilar-Bonilla, Amy Smith   +6 more
openalex   +1 more source

Transient interference excision and spectrum reconstruction for OTHR

Electronics Letters, 2012
High-frequency sky wave over-the-horizon radar (OTHR) suffers performance degradation from transient interference. The segmental subspace projection approach is applied to suppress the clutter and locate the transient interference. After interference excision by adaptive thresholding, the integrated Doppler spectrum is reconstructed based on compressed
Y.H. Quan, M.D. Xing, L. Zhang, Z. Bao
openaire   +1 more source

OTHR-05. A LIVING EX VIVO PLATFORM FOR FUNCTIONAL, PERSONALIZED PEDIATRIC BRAIN CANCER DIAGNOSIS [PDF]

, 2023
Breanna Mann, Xiaopei Zhang, Noah Bell, Adebimpe Adefolaju, Morrent Thang, Rajaneekar Dasari, Krishna Kanchi, Alain Valdivia, Yang Yang, Carolyn Quinsey, Yasmeen Rauf, David E. Kram, Noah Cassidy, Cyrus Viziri, David L. Corcoran, S. Cillero Rego, Yuchao Jiang, Lee M. Graves, Denise Dunn, Scott Floyd, Albert S. Baldwin, Shawn Hingtgen, Andrew Satterlee   +22 more
openalex   +1 more source

A Statistical Examination of the Spatial Correlations of HF Ionospheric Absorption Signatures Using the GO‐Canada Riometer Network

Journal of Geophysical Research: Space Physics, Volume 129, Issue 11, November 2024.
Abstract A network of 30‐MHz riometers distributed across Canada have been monitoring auroral absorption for decades. Electron precipitation can cause enhanced densities to develop below ∼100 km where the higher neutral density can cause absorption of High Frequency (HF) signals.
R. G. Gillies, E. Spanswick, S. Skone
wiley   +1 more source

A Coordinate Registration Method for Over-the-Horizon Radar Based on Graph Matching

Remote Sensing
Coordinate registration (CR) is the key technology for improving the target positioning accuracy of sky-wave over-the-horizon radar (OTHR). The CR parameters are derived by matching the sea–land clutter classification (SLCC) results with prior geographic
Can Li, Zengfu Wang, Quan Pan, Zhiyuan Shi   +3 more
doaj   +1 more source

A Geometric Barycenter-Based Clutter Suppression Method for Ship Detection in HF Mixed-Mode Surface Wave Radar

Remote Sensing, 2019
The nonhomogeneous clutter is a major challenge for ship detection in high-frequency mixed-mode surface wave radar. In this paper, a geometric barycenter-based reduced-dimension space-time adaptive processing method is proposed to suppress the clutter ...
Jiazhi Zhang, Xin Zhang, Weibo Deng, Lei Ye, Qiang Yang   +4 more
doaj   +1 more source

HiCIRF: a high-fidelity HF channel simulation [PDF]

, 2012
A high-fidelity HF channel simulation has been developed that is suitable for Over-the-Horizon Radar (OTHR) and HF communication system design studies and test planning.
Gavin St. John, Sergey V. Fridman, L. J. Nickisch, St. John, G., Fridman, S., Hausman, M., C. J. Coleman, Nickisch, L., Coleman, C., Mark A. Hausman   +9 more
core   +1 more source

A tale of four cities: Neighbourhood diversification and residential desegregation in and around England's ‘no majority’ cities

The Geographical Journal, Volume 190, Issue 2, June 2024.
Short Abstract Birmingham, Leicester, London and Manchester have emerged as England's only ‘no majority’ cities, where no single ethnic group forms more than 50% of the population. This paper looks at where the diversification of these cities has continued over the period from 2001 to 2021 or whether the reduction in the number of White British has led
Richard Harris
wiley   +1 more source

OTHR-15. Papillary tumor of the pineal region: case series of this rare pediatric entity [PDF]

, 2022
Margaret Shatara, Evan Cantor, Ashley Meyer, Andrea Ogle, Tammy Green, Mary Beck, Michele McHugh, Nicole M Brossier, Andrew Cluster, Joshua B. Rubin, Ali Mian, Sonika Dahiya, Stephanie M. Perkins, Mohamed S Abdelbaki, Jennifer M. Strahle, David D. Limbrick, Sean D. McEvoy   +16 more
openalex   +1 more source