Results 81 to 90 of about 5,022,313 (284)

Local determination of ionospheric plasma convection from coherent scatter radar data using the SECS technique [PDF]

, 2010
A new technique for merging line-of-sight (LOS) data of the ionospheric plasma convection velocity, as obtained from coherent scatter radars, into a full velocity vector field on a sphere is presented.
Tim K. Yeoman (7583066), Lester, M., O. Amm (7591346), Mark Lester (6477935), Amm, O., Yeoman, T. K., Grocott, A., Adrian Grocott (7590026)   +7 more
core   +4 more sources

ISAR imaging resource-scheduling algorithm in network radar based on information fusion

The Journal of Engineering, 2019
Aiming at the application requirements of three-dimensional (3-D) fusion imaging of network radar, this study proposes an ISAR imaging resource-scheduling algorithm for network radar.
Aiqiong Li, Kefei Liao, Shan Ouyang, Jingjing Li   +3 more
doaj   +1 more source

Comparison of D-region Doppler drift winds measured by the SuperDARN Finland HF radar over an annual cycle using the Kiruna VHF meteor radar [PDF]

, 2003
The SuperDARN chain of oblique HF radars has provided an opportunity to generate a unique climatology of horizontal winds near the mesopause at a number of high latitude locations, via the Doppler shifted echoes from sources of ionisation in the D-region.
N. F. Arnold (7589813), T. R. Robinson (7590257), P. A. Cook, Chapman, Peter J., N. Mitchell, P. A. Cook (7692134), Lester, M., Mitchell, N., Mitchell, Nick, P. J. Chapman, Arnold, Neil E., Robinson, T. R., Chapman, P. J., M. Lester, Cook, Peter A., M. Lester (7589660), P. J. Chapman (7590299), Arnold, N. F., Cook, P. A., T. R. Robinson, Lester, Mark, N. Mitchell (7692137), N. F. Arnold   +22 more
core   +2 more sources

Aerosol Jet Printing of Benzocyclobutene as a Thermally Stable, Low‐Loss Dielectric for Multilayer Microwave Electronics

Advanced Materials Technologies, EarlyView.
Multilayer aerosol jet printed components with a low‐loss, thermally stable dielectric are demonstrated using benzocyclobutene. Ink formulation and in‐line droplet evaporation control support high‐quality, versatile, and stable printing performance. A specialized measurement for low‐loss materials reveals promising microwave properties, which, combined
Md Ramjan Ali, Trent Moritz, Mohammad Tayeb Al Qaseer, Ethan B. Secor   +3 more
wiley   +1 more source

Superdarn radar HF propagation and absorption response to the substorm expansion phase [PDF]

, 2002
International audienceCoherent scatter HF ionospheric radar systems such as SuperDARN offer a powerful experimental technique for the investigation of the magnetospheric substorm.
J. A. Davies, Milan, S. E., Honary, F., T. K. Yeoman (7601525), J. A. Davies (4412452), J. K. Gauld (7674179), F. Honary (7604621), T. K. Yeoman, Davies, J. A., S. E. Milan, J. K. Gauld, F. Honary, Yeoman, T. K., S. E. Milan (7594526), Gauld, J. K.   +14 more
core   +2 more sources

Liquid‐Crystal‐Based Reconfigurable Intelligent Surface for 7 GHz Mobile Communication

Advanced Materials Technologies, EarlyView.
The glass‐based liquid‐crystal reconfigurable intelligent surface (LC‐RIS) integrates active‐matrix driving and blind‐greedy phase optimization within a 5G‐NR OFDM framework. This enables continuously tunable and autonomous enhancement of wireless coverage. Leveraging the transparency and manufacturability of liquid crystal panels, it is ideally suited
Tien‐Lun Ting, Yuh‐Chyi Chang, Yi‐Chan Hung, Cheng‐Yuan Hsiao, Chao‐Kai Wen, Tsung‐Hsien Lin   +5 more
wiley   +1 more source

Short-term rainfall nowcasting: using rainfall radar imaging [PDF]

, 2009
As one of the most useful sources of quantitative precipitation measurement, rainfall radar analysis can be a very useful focus for research into developing methods for rainfall prediction.
Wang, Peng, O'Connor, Noel E., O'Connor, Edel, Smeaton, Alan F., Songyang, Lao, Ling, Yunxiang   +5 more
core   +2 more sources

Promoting Earth-Based Radar Astronomical Observations of the Moon

Sensors, 2020
Earth-based radar astronomical observations provide information on surface characteristics, orbits, and rotations for a wide variety of solar system objects.
Jing Sun, Jinsong Ping, Yuri Bondarenko, Dmitry Marshalov, Fengchun Shu, Jianfeng Cao, Songtao Han, Lue Chen, Wen Chen   +8 more
doaj   +1 more source

Extrinsic Limitations of Stealthy Hyperuniform Devices

Advanced Optical Materials, EarlyView.
Stealthy hyperuniform devices exhibit a scattering‐free angular region whose extent follows a simple quenching equation. Experimental measurements confirm this prediction but reveal quenching efficiencies far below theoretical expectations. Multiple scattering and finite‐size effects are quantified, establishing realistic performance limits for ...
Yuhao Xu, Miao Chen, Louis Forestier, Franck Carcenac, Laurent Mazenq, Philippe Lalanne   +5 more
wiley   +1 more source

Drought sensitivity characteristics and relationships between drought indices over Upper Blue Nile basin

Journal of Water and Land Development, 2019
Drought is an extreme event that causes great economic and environmental damage. The main objective of this study is to evaluate sensitivity, characterization and propagation of drought in the Upper Blue Nile.
Kebede Abebe, Raju Jaya Prakash, Korecha Diriba, Takele Samuel, Nigussie Melessew   +4 more
doaj   +1 more source