Results 61 to 70 of about 648,996 (229)

Polarimetric Adaptive Coherent Detection in Lognorm-Texture-Distributed Sea Clutter

Remote Sensing
This paper addresses polarimetric adaptive coherent detection of radar targets embedded in sea clutter. Initially, radar clutter data across multiple polarimetric channels is modeled using a compound Gaussian framework featuring an unspecified speckle ...
Jian Xue, Jiali Yan, Shuwen Xu, Jun Liu
doaj   +1 more source

Polarimetric radar modified

Eos, Transactions American Geophysical Union, 1990
Modification of 11‐cm Doppler radar, to permit measurement of the complete polari‐metric matrix of signals backscattered from meteorological media, was recently completed by the Ground Based Remote Sensing Branch of the Geophysics Laboratory, U.S. Air Force Base, Hanscom, Mass. It is believed that this radar is the only meteorological research radar in
openaire   +1 more source

Aerosol Retrieval Over Ocean From DPC‐2/GF‐5(02): Using RemoTAP Extended With a 3‐Parameter Ocean Bio‐Optical Model and Comparisons With a 1‐Parameter Model

Journal of Geophysical Research: Atmospheres, Volume 131, Issue 20, 28 October 2026.
Abstract Multi‐angle polarimetric instruments (MAPs) enable the retrieval of essential aerosol properties over oceanic regions. MAPs retrieval algorithms commonly use a 1‐parameter ocean bio‐optical model (OBM), based on chlorophyll‐a concentration only to represent optical properties over open waters (case‐1), whereas the coastal water (mixture of ...
Cheng Fan, Jeon‐Teo Dong, Guangliang Fu, Sha Lu, Zihan Zhang, Neranga K. Hannadige, Meng Gao, Peng‐Wang Zhai, Gerrit de Leeuw, Zhengqiang Li, Otto Hasekamp   +10 more
wiley   +1 more source

Doppler polarimetric ground clutter identification and suppression for atmospheric radars based on co-polar correlation

Journal of Telecommunications and Information Technology, 2001
A new clutter suppression technique that uses both Doppler and polarimetric information is presented. Polarimetric properties of the target and clutter are calculated per Doppler frequency cell and based on this information clutter suppression is ...
Dmitri Moisseev, Christine Unal, Herman Russchenberg, Leo P. Ligthart   +3 more
doaj   +1 more source

SNR and Noise Variance Estimation in Polarimetric SAR Data [PDF]

, 2013
The problem of estimating the signal-to-noise ratio (SNR) of the cross-polarised channels and the noise variance in polarimetric synthetic aperture radar (SAR) data is dealt with.
Villano, Michelangelo, Papathanassiou, Konstantinos   +1 more
core  

A polarimetric Doppler radar time‐series simulator for biological applications [PDF]

, 2018
The high mobility of airborne organisms makes them inherently difficult to study, motivating the use of radars and radar networks as biological surveillance tools.
Phillip M. Stepanian, Phillip B. Chilson, Chilson, P. B., Djordje Mirkovic, Stepanian, P. M., Mirkovic, D., Stepanian, Phillip   +6 more
core   +1 more source

Shallow Poroelastic Hydrothermal Deformation at Changbaishan Volcano Before the 2020 Unrest Revealed by Sentinel‐1 InSAR Time Series

Geophysical Research Letters, Volume 53, Issue 19, 16 October 2026.
Abstract Ground deformation of dormant volcanoes provides critical insights into subsurface processes and potential hazards. Here we present Sentinel‐1 Interferometric Synthetic Aperture Radar (InSAR) time series (2015–2020) for Changbaishan volcano, the largest intraplate volcanic system in East Asia. We detect persistent subsidence of up to 3.5 mm/yr
Xingjun Luo, Wenbin Xu, Nicolas Oestreicher, Joël Ruch   +3 more
wiley   +1 more source

Enhanced Retrieval of Raindrop Size Distribution by Integrating Disdrometer Observations and Atmospheric Variables With Machine Learning

Geophysical Research Letters, Volume 53, Issue 19, 16 October 2026.
Abstract Accurate representation of raindrop size distribution (DSD) is crucial for understanding precipitation microphysics and improving quantitative precipitation forecasting. Conventional methods in numerical models often prescribe the DSD shape parameter as a constant or derive it from empirical relationships based solely on disdrometer ...
Limin Lin, Huiling Yuan, Xuwei Bao, Shangshang Yang, Lin Deng, Shuai Zhang, Yuanming Zhao   +6 more
wiley   +1 more source

The Wessex Convection Experiment (WesCon)–Observing the Evolving Structures of Turbulence (WOEST): Coordinated Aircraft and Ground‐Based Observations of Turbulence and Convection in Southwest England During Summer 2023

Geoscience Data Journal, Volume 13, Issue 4, October 2026.
This paper summarises a coordinated field campaign in southern England in summer 2023 as part of the ParaChute programme, which studied atmospheric turbulence to improve weather and climate models. The field campaign used ground‐based instruments, aircraft and drones to observe turbulence and storms, creating datasets to develop better turbulence ...
Sarah L. Barr, Ryan R. Neely III, David M. Schultz, Thorwald H. M. Stein, Steven J. Abel, Michael Baidu, Paul A. Barrett, Lindsay J. B. Rhodes, Jake Bland, Timothy Darlington, Edward Gryspeerdt, Natalie J. Harvey, Humphrey W. Lean, Chun Hay Brian Lo, Aoife McQuaid, Emily G. Norton, Simon R. Osborne, Ben S. Pickering, Philip Rosenberg, Hugo M. Ricketts, Joseph Robinson, Robert J. Thompson, Christopher J. Walden, Freya I. Addison, Jennifer K. Brooke, Peter Clark, Ronald Clark, Martin I. Daily, Alex Fearn, Polly B. Foster, Suzanne L. Gray, James Groves, Kirsty E. Hanley, Amanda Kerr‐Munslow, Jona Keimer, Martin Kumm, Justin M. Langridge, Jacob Lin, Laurents R. R. Marker, James R. McGregor, Heather Moore, Benjamin J. Murray, Jeremy D. Price, Alexander J. Roberts, Robert W. Scovell, Jens Wellhausen, Alison J. Stirling   +46 more
wiley   +1 more source

Probable Maximum Precipitation: The Smethport Challenge

Water Resources Research, Volume 62, Issue 10, October 2026.
Abstract The 18 July 1942 Smethport, Pennsylvania storm produced US and world record rainfall accumulations of 165 mm in 10 min, 240 mm in 25 min and 780 mm in 270 min. Observations from the Smethport storm control sub‐daily Probable Maximum Precipitation (PMP) estimates over a large region of the eastern US.
James A. Smith, Mary Lynn Baeck, John F. England Jr., Long Yang, Russ S. Schumacher, Kelly Mahoney   +5 more
wiley   +1 more source