Results 81 to 90 of about 44,798 (233)

Functional Architecture of Full Inertial Compensation for Beam Steering Command on Terrain-Following Mode Operation of Airborne AESA Radar [PDF]

Journal of Electromagnetic Engineering and Science
Active electronically scanned array (AESA) radars, which are usually a fighter jet, can operate in terrain-following (TF) mode to generate a terrain profile based on TF scan commands.
Dongju Lim, Yongmin Kim, Joongyoon Lee
doaj   +1 more source

Small but mighty: Impact hazards from iron Near‐Earth Objects

Meteoritics &Planetary Science, EarlyView.
Abstract Small asteroids can impact Earth unexpectedly, as demonstrated by the Chelyabinsk event in 2013. The warning times are likely to be short, and the first tools for fast hazard predictions have been developed in the last years for encounters with rocky or cometary objects, which quickly fragment in the atmosphere and cause airbursts. However, in
Robert Luther, Natalia Artemieva, Andrea Schmalen, Kai Wünnemann, Detlef Koschny, Richard Moissl   +5 more
wiley   +1 more source

Radar waveform generative design method

Electronics Letters
To address the issue of radar detection performance degradation caused by interference in complex electromagnetic environments, this paper proposes a generative waveform design method and demonstrates its advantages.
Yuhao Hu, Weidong Hu, Xiaoyong Du, Gang Lei   +3 more
doaj   +1 more source

Ultra-Wide Swath SAR Imaging With Continuous PRF Variation [PDF]

, 2010
Innovative multi-channel synthetic aperture radar (SAR) concepts enable high-resolution wide-swath imaging, but the antenna length typically restricts the achievable swath width.
Gebert, Nicolas, Krieger, Gerhard
core  

The Dejudicialization of the German Federal Bureaucracy: An Organizational Perspective on Policy‐Related Knowledge

Review of Policy Research, EarlyView.
ABSTRACT Using data from a long‐term survey of senior civil servants (1970–2021), this study investigates the declining share of jurists in federal ministerial departments in Germany. The mechanisms driving this trend and its subsequent effects are discussed from an organizational perspective, highlighting the influence of environmental pressure and ...
Marian Döhler
wiley   +1 more source

Research instrumentation for tornado electromagnetics emissions detection [PDF]

, 1977
Instrumentation for receiving, processing, and recording HF/VHF electromagnetic emissions from severe weather activity is described. Both airborne and ground-based instrumentation units are described on system and subsystem levels. Design considerations,
Jenkins, H. H., Wilson, C. S.
core   +1 more source

Machine Learning Approximations for Fast and Accurate Prediction of Nonlinear Four‐Wave Interactions in Spectral Wave Models

Journal of Geophysical Research: Machine Learning and Computation, Volume 3, Issue 1, February 2026.
Abstract Operational wave forecasting requires a delicate balance between the accuracy and computational speed of the spectral wave model used, in which the nonlinear wave–wave interaction “source” term plays an important role. The exact formulation of these nonlinear four‐wave interactions requires solving the six‐dimensional Boltzmann integral, an ...
Jialun Chen, Thomas A. A. Adcock, Qingxiang Liu, Ronald Clark, Tianning Tang   +4 more
wiley   +1 more source

An active jamming recognition algorithm based on ER-C-L network model [PDF]

Zhihui kongzhi yu fangzhen
To solve the problem of low recognition accuracy of radar active jamming in strong noise environment,an algorithm for ER-C-L(Extended ResNet-CNN-LSTM) network model based on one-dimensional composite features is proposed.
ZHAO Zhongchen, LIU Limin, XIE Hui, HAN Zhuangzhi, JING He
doaj   +1 more source

SynQPF‐Net: Short‐Term Precipitation Forecasts by Integrating GraphCast Predictions and High‐Resolution Observational Analyses

Journal of Geophysical Research: Machine Learning and Computation, Volume 3, Issue 1, February 2026.
Abstract While data‐driven global weather models (e.g., GraphCast) excel at large‐scale circulation forecasts, they exhibit systematic biases in heavy precipitation prediction due to European Centre for Medium‐Range Weather Forecasts Reanalysis (ERA5) uncertainties and neural networks' tendency to over‐smooth rainfall fields.
Dandan Chen, Dan Yao, Yaqiang Wang
wiley   +1 more source

Active reconfigurable intelligent surface‐aided multiple‐input‐multiple‐output radar detection in the presence of clutter

IET Radar, Sonar & Navigation
Reconfigurable intelligent surface (RIS) refers to a two‐dimensional smart surface consisting of massive number of reflecting elements. Both active RIS (ARIS) and passive RIS (PRIS) are promising technologies that can adapt and reconfigure the wireless ...
Yu Zhang, Da Li, Bo Tang, Haichuan Zhang, Lei Zuo   +4 more
doaj   +1 more source