Results 81 to 90 of about 23,028 (236)

Characterization of synoptic environment for mesoscale convective systems over South Korea using ERA5 reanalysis data

Quarterly Journal of the Royal Meteorological Society, EarlyView.
In this study, the synoptic conditions for modes of mesoscale convective systems (MCSs) in South Korea are generalized based on composite analysis. The preferred precipitation region, synoptic patterns, moisture transport, sea surface temperature and thermodynamic and dynamic instabilities are characterized according to four modes: convective cells (CC)
Jeong‐Eun Lee, GyuWon Lee
wiley   +1 more source

HF Radar Sea-echo from Shallow Water

Sensors, 2008
HF radar systems are widely and routinely used for the measurement of ocean surface currents and waves. Analysis methods presently in use are based on the assumption of infinite water depth, and may therefore be inadequate close to shore where the radar ...
Josh Kohut, Don Barrick, Bruce Nyden, Belinda Lipa   +3 more
doaj  

Differential Phase Estimation with the SeaMARC II Bathymetric Sidescan Sonar System [PDF]

, 1992
A maximum-likelihood estimator is used to extract differential phase measurements from noisy seafloor echoes received at pairs of transducers mounted on either side of the SeaMARC II bathymetricsidescan sonar system. Carrier frequencies for each side are
Cervenka, Pierre, de Moustier, Christian, Masnadi-Shirazi, M A, Zisk, Stanley H   +3 more
core   +2 more sources

Enabling Under Ice Glider Operations: A Backseat Driver Approach

Journal of Field Robotics, EarlyView.
ABSTRACT Polar Oceans are key locations for forcing global ocean circulation, influencing both global climate and biogeochemical cycles. Due to restricted access to these seasonally and perennially ice‐covered regions, these areas are severely undersampled.
Yaomei Wang, Benjamin Allsup, Georgios Salavasidis, Stephen Woodward, Adeniyi Adenaya, Mike Smart, Alexis Johnson, Felipe Marques Dos Santos, Jake Ludgate, Daniel Matterson, Alvaro Lorenzo, J. Alexander Brearley, Alexander Brian Phillips   +12 more
wiley   +1 more source

Satellite Oceanography from the ERS Synthetic Aperture Radar and Radar Altimeter: A Brief Review

, 2013
Johannessen, J.A. et. al.-- 26 pages, 13 figures, 1 table The cloud independent, all weather, day-and-night, active microwave Synthetic Aperture Radar (SAR) and Radar Altimeter (RA) operated continuously on ERS-1 from July 1991 to March 2000 and on ERS-2 from October 1995 to July 2011.
Johannessen, J.A., Portabella, Marcos, Vachon, P.   +2 more
openaire   +3 more sources

Automatic eddy detection in the MIZ based on YOLO algorithm and SAR images

Science of Remote Sensing
The automatic detection and analysis of oceanic eddies within the marginal ice zone using synthetic aperture radar present significant challenges, yet are crucial for both scientific research and practical applications.
Nikita Sandalyuk, Eduard Khachatrian
doaj   +1 more source

Multifeature Fusion Neural Network for Oceanic Phenomena Detection in SAR Images

Sensors, 2019
Oceanic phenomena detection in synthetic aperture radar (SAR) images is important in the fields of fishery, military, and oceanography. The traditional detection methods of oceanic phenomena in SAR images are based on handcrafted features and detection ...
Zhuofan Yan, Jinsong Chong, Yawei Zhao, Kai Sun, Yuhang Wang, Yan Li   +5 more
doaj   +1 more source

Observing the polar oceans with spaceborne radar [PDF]

The application of spaceborne imaging radar data to polar oceanography and sea ice is explored. Several problems come to mind which are presently ripe with ideas and models, but are in need of new data, SAR data, for any progress to be made.
Rothrock, Drew
core   +1 more source

First Results of a New Inversion Tool for Thermospheric Neutral Mass Density Computations During Severe Geomagnetic Storms

AGU Advances, Volume 7, Issue 3, June 2026.
Abstract In Low Earth Orbit (LEO), atmospheric drag is the dominant source of trajectory prediction error below approximately 700 km altitude, primarily due to inaccuracies in thermospheric density models. This work presents a method for temporally deconvolving Energy Dissipation Rates (EDRs) to produce single‐satellite density estimates, which can be ...
S. Mutschler, M. Pilinski, E. Zesta, D. M. Oliveira, K. Delano, K. Garcia‐Sage, W. K. Tobiska   +6 more
wiley   +1 more source

Technical background, chapter 3, part B [PDF]

A description is given of the physics of electromagnetic scattering from the sea and a guideline is presented to relate an observable (such as the radar cross section) to the hydrodynamics or physical properties of the sea.

core   +1 more source