Results 111 to 120 of about 671,317 (227)
Sea‐Level Change in Hong Kong From Tide Gauges, GNSS, and Satellite Altimetry
Journal of Geophysical Research: Oceans, Volume 131, Issue 9, September 2026.Abstract As a densely populated, highly urbanized coastal city, Hong Kong is particularly vulnerable to sea‐level rise, which amplifies flood risk and threatens coastal infrastructure, economies, and ecosystems. We combine observations from tide gauges, conventional gridded satellite altimetry, coastal‐retracked altimetry, and Global Navigation ...
Dongju Peng +5 more
wiley +1 more source
Geophysical Research Letters, Volume 53, Issue 16, 28 August 2026.Abstract Doppler frequency shifts (DFSs) recorded by continuous wave‐high frequency Doppler sounding systems and ionograms observed by five ionosondes in Taiwan and Japan are used to study three‐dimensionally seismo‐ and tsunami‐traveling ionospheric disturbances (STIDs and TTIDs) triggered by the 29 July 2025 Mw8.8 Kamchatka earthquake.
Yao‐Chun Chen +9 more
wiley +1 more source
Geophysical Research Letters, Volume 53, Issue 16, 28 August 2026.Abstract Extreme positive cloud‐to‐ground lightning over East Asian midlatitudes exhibits a spring–autumn double maximum hidden by the familiar winter climatology. Using 1,838,538 return strokes with absolute peak currents at least 200 kA during 2006–2024, we resolve its annual cycle by month and latitude.
Nengxing Guo +7 more
wiley +1 more source
Optimal Waveforms For Compressive Sensing Radar
, 2013 Publication in the conference proceedings of EUSIPCO, Marrakech, Morocco ...
Lyubomir Zegov +2 more
openaire +3 more sources
The Role of Lightning in Atmospheric Chemistry
Journal of Geophysical Research: Atmospheres, Volume 131, Issue 16, 28 August 2026.Abstract Lightning has important effects on atmospheric constituents in primarily the middle and upper troposphere. We summarize the effects of lightning on atmospheric chemistry that have been published since the last major review in 2007. The estimates of NOx production by lightning (LNOx) are based on five methods: theoretical/laboratory estimates ...
Kenneth E. Pickering +2 more
wiley +1 more source
Waveforms design for modern radar: the chirp signal fifty + years later [PDF]
, 2014 The optimal design of chirp radar waveforms has to satisfy conflicting requirements. Optimal solutions for different values of the compression ratio are considered, evaluated and compared with each other.
De Palo, F. +5 more
core +1 more source
SensorsThe orthogonal frequency-division multiplexing (OFDM) mode with a linear frequency modulation (LFM) signal as the baseband waveform has been widely studied and applied in multiple-input multiple-output (MIMO) radar systems.
Meng Xia, Wenrong Gong, Lichao Yang
doaj +1 more source
Planar Super‐Oscillation Diffractive Lenses: Practical Developments and Applications
Nanophotonics, Volume 15, Issue 16, 26 August 2026.This review examines planar super‐oscillation diffractive lenses as a unified framework for super‐oscillatory lenses and supercritical lenses. It focuses on applications in super‐resolution imaging, micro/nanofabrication, and precision measurement and relates their application‐specific requirements to focal‐field control, multiobjective design ...
Yutian Cheng +6 more
wiley +1 more source
Phase‐coded radar waveform design with quantum annealing
IET Radar, Sonar & NavigationThe Integrated Side Lobe Ratio (ISLR) problem the authors consider here consists in finding optimal sequences of phase shifts in order to minimise the mean squared cross‐correlation side lobes of a transmitted radar signal and a mismatched replica ...
Timothé Presles +3 more
doaj +1 more source