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Mid‐latitude E region field‐aligned irregularities observed with the MU radar
(American Geophysical Union, 1991-09)
Fine structures E region field-aligned irregularities were observed on June 24–25, 1989, with the MU radar at Shigaraki, Japan (34.9N, 136.1E; geomagnetic latitude 25.0N). The 3.2-m scale irregularities were observed with ...
Evaluation of an efficient approach for target tracking from acoustic imagery for the perception system of an autonomous underwater vehicle
(In-teh, 2013-08)
This article describes the core algorithms of the perception system to be included within an autonomous underwater vehicle (AUV). This perception system is based on the acoustic data acquired from a side scan sonar (SSS). ...
An imaging interferometry capability for the EISCAT Svalbard Radar
(European Geosciences Union (EGU), 2005-01-31)
Interferometric imaging (aperture synthesis imaging) is a technique used by radio astronomers to achieve angular resolution that far surpasses what is possible with a single large aperture. A similar technique has been ...
On the development of nonlinear waves in the equatorial electrojet
(Elsevier, 2013-10)
Theories for the equatorial electrojet (EEJ) have been notoriously difficult to resolve with data. Two of these problems were solved recently and another is discussed in this publication. We initially review solutions to ...
Efficient Approach for OS-CFAR 2D Technique Using Distributive Histograms and Breakdown Point Optimal Concept applied to Acoustic Images
(Institution of Engineering and Technology, 2019-12)
In this work, a new approach to improve the algorithmic efficiency of the Order Statistic-Constant False Alarm Rate (OS-CFAR) applied in two dimensions (2D) is presented. OS-CFAR is widely used in radar technology for ...
Mesoscale variability in the Alboran Sea: Synthetic aperture radar imaging of frontal eddies
(Journal of Geophysical Research, 2002)
In autumn 1992 the entire Alboran Sea (western Mediterranean) was sampled by the Spanish R/V García del Cid. The incoming jet of Atlantic water, its associated meandering front, and the two big anticyclonic gyres were ...
First Jicamarca radar observations of two-stream E region irregularities under daytime counter equatorial electrojet conditions
(American Geophysical Union, 2002-12-27)
We report the first Jicamarca Radio Observatory (JRO) observations of two-stream irregularities under daytime counter equatorial electrojet (CEEJ) conditions, made with a VHF radar. This type of irregularity, although ...
A Framework for Acoustic Segmentation Using Order Statistic-Constant False Alarm Rate in Two Dimensions from Sidescan Sonar Data
(Institute of Electrical and Electronics Engineers, 2018-07)
This paper describes a framework for object segmentation from sidescan sonar acoustic data. The current techniques consume a great deal of computational resources to accurately carry out object segmentation. They also ...
Accumulated CA-CFAR Process in 2-D for Online Object Detection From Sidescan Sonar Data
(Institute Of Electrical And Electronics Engineers, 2014-10)
This paper describes a novel approach to object detection from sidescan sonar (SSS) acoustical images. The current techniques of acoustical images processing consume a great deal of time and computational resources with ...
Particle-in-cell simulation of incoherent scatter radar spectral distortions related to beam-plasma interactions in the auroral ionosphere
(Blackwell Publishing Ltd, 2011)
An electrostatic parallel particle-in-cell (EPPIC) code that allows for particle beam injections and multiple boundary conditions is used to investigate the beam-plasma interaction and its manifestations in the incoherent ...