Results 51 to 60 of about 1,492 (208)

The First Results of Ionospheric Skywave Propagation Experiment Over Taiwan

Radio Science, Volume 61, Issue 1, January 2026.
Abstract An ionospheric over‐the‐horizon propagation experiment was carried out in Taiwan to investigate characteristics of ionospheric F layer skywave propagation at frequencies 4–12 MHz. Experimental results show that there are prominent diurnal variations in the incident angle, virtual height and plasma frequency at reflection height, which are ...
Hung‐Shi Lin, Ching‐Lun Su, Kang‐Hung Wu, Yen‐Hsyang Chu   +3 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

A Generalized Oblique Projection Filter with Flexible Parameter for Interference Suppression

International Journal of Antennas and Propagation, 2015
A generalized oblique projection (GOP) with an adjustable parameter defined as interference suppression cost (ISC) is proposed. Therefore, an optional optimized signal to interference-plus-noise ratio (SINR) and user controlled actions on the ...
Yi-ming Wang, Xing-peng Mao, Hong Hong, Jie Zhang, Yu-mei Cui   +4 more
doaj   +1 more source

Radar Polarimetry in Glaciology: Theory, Measurement Techniques, and Scientific Applications for Investigating the Anisotropy of Ice Masses

Reviews of Geophysics, Volume 63, Issue 4, December 2025.
Abstract Dielectric anisotropy in ice alters the propagation of polarized radio waves, so polarimetric radar sounding can be used to survey anisotropic properties of ice masses. Ice anisotropy is either intrinsic, associated with ice‐crystal orientation fabric (COF), or extrinsic, associated with material heterogeneity, such as bubbles, fractures, and ...
Benjamin H. Hills, T. J. Young, David A. Lilien, Esther Babcock, Nicole Bienert, Donald Blankenship, John Bradford, Giancorrado Brighi, Alex Brisbourne, Jørgen Dall, Reinhard Drews, Olaf Eisen, M. Reza Ershadi, Tamara A. Gerber, Nicholas Holschuh, Daniela Jansen, Thomas M. Jordan, Nanna B. Karlsson, Jilu Li, Carlos Martín, Kenichi Matsuoka, Daniel May, Falk M. Oraschewski, John Paden, Nicholas M. Rathmann, Neil Ross, Dustin M. Schroeder, Martin Siegert, Matthew R. Siegfried, Emma Smith, Ole Zeising   +30 more
wiley   +1 more source

Strain Rates Along the Alpine‐Himalayan Belt From a Comprehensive GNSS Velocity Field

Journal of Geophysical Research: Solid Earth, Volume 130, Issue 12, December 2025.
Abstract The Alpine‐Himalayan belt is one of Earth's most dynamic and complex regions, characterized by intense tectonic deformation and seismicity. Comprehensive analyses of continental‐scale crustal deformation and seismic hazards along this extensive orogenic belt require the compilation of large geodetic data sets.
N. Castro‐Perdomo, S. Jónsson, Y. Klinger, F. Masson, T. W. Becker, K. Johnson   +5 more
wiley   +1 more source

Spreading Sea Clutter Suppression for High-Frequency Hybrid Sky-Surface Wave Radar Using Orthogonal Projection in Spatial–Temporal Domain

Remote Sensing
In recent years, the high-frequency hybrid sky-surface wave radar (HSSWR) has been increasingly used for target detection applications. Nevertheless, the specific bistatic system layout and the phase path disturbances induced by the ionospheric ...
Qing Zhou, Yufan Bai, Xiaohua Zhu, Xiongbin Wu, Hong Hong, Chuanwei Ding, Heng Zhao   +6 more
doaj   +1 more source

Electromagnetic Wave Theory and Applications [PDF]

, 1987
Contains reports on twelve research projects.Joint Services Electronics Program (Contract DAALO3-86-K-0002)National Science Foundation (Grant ECS 85-04381)National Aeronautics and Space Administration/Goddard Space Flight Center (Contract NAG5-270 ...
Ali, Samuel, Borgeaud, Maurice, Groves, Keith M., Gu, Qizheng, Habashy, Tarek M., Han, H. C., Kiang, Jean-Fu, Kong, Jin Au, Lee, Min C., Lin, Freeman C., Nghiem, Son V., Poh, Soon Y., Schwartz, Al, Shin, Robert T., Tsuk, Michael J., Tulintseff, Ann N., Yang, Ying-Ching Eric, Yueh, Herng A.   +17 more
core   +1 more source

High Frequency Radar Perspective of Putative Subglacial Liquid Water on Mars

Geophysical Research Letters, Volume 52, Issue 22, 28 November 2025.
Abstract Anomalously bright radar reflections from the base of Mars' south polar cap raise the tantalizing possibility of present‐day liquid water. Orosei et al. (2018, https://doi.org/10.1126/science.aar7268) first reported bright subsurface echoes from the Mars Advanced Radar for Subsurface and Ionosphere Sounding (MARSIS) prompting studies of ...
Gareth A. Morgan, Matthew R. Perry, Bruce A. Campbell, Nathaniel E. Putzig, Jennifer L. Whitten, Fabrizio Bernardini   +5 more
wiley   +1 more source

An overview of data acquisition, signal coding and data analysis techniques for MST radars [PDF]

, 1986
An overview is given of the data acquisition, signal processing, and data analysis techniques that are currently in use with high power MST/ST (mesosphere stratosphere troposphere/stratosphere troposphere) radars.
Rastogi, P. K.
core   +1 more source

Moving Target Azimuth Velocity Estimation for the MASA Mode Based on Sequential SAR Images [PDF]

, 2017
A novel azimuth velocity estimation method is proposed based on the multiple azimuth squint angles (MASA) imaging mode, acquiring sequential synthetic aperture radar images with different squint angles and time lags. The MASA mode acquisition geometry is
Chen, J., Liu, W., Wang, P., Yang, W.
core   +1 more source