Results 71 to 80 of about 1,492 (208)
On a new process for cusp irregularity production [PDF]
, 2008 Two plasma instability mechanisms were thought until 2007 to dominate the formation of plasma irregularities in the F region high latitude and polar ionosphere; the gradient-drift driven instability, and the velocity-shear driven instability.
H. C. Carlson, J. Moen, K. Oksavik
core +2 more sources
Distributed Shipborne HFHSSWR Localisation Method Based on Gaussian Markov Fields
IET Radar, Sonar &Navigation, Volume 19, Issue 1, January/December 2025.This paper investigates a distributed shipborne high‐frequency hybrid surface‐surface wave radar (HFHSSWR) model that combines shared sky wave paths with distinct shipboard surface wave paths. This model improves target localisation accuracy and overcoming the limited aperture of single shipboard array.
Longyuan Xu +3 more
wiley +1 more source
Ionospheric Radio Beacon Signal Analysis and Parameter Estimation Using Automatic Differentiation
Journal of Geophysical Research: Machine Learning and Computation, Volume 1, Issue 4, December 2024.Abstract Continuous wave signals from a network of high frequency (HF) beacons in Peru and other instruments are used to reconstruct the regional ionospheric electron number density in the volume surrounding the network. The continuous wave (CW) HF signals employ binary phase codes with pseudorandom noise (PRN) encoding, and the observables include ...
Jhassmin A. Aricoche, David L. Hysell
wiley +1 more source
Meteoroid velocity distribution derived from head echo data collected at Arecibo during regular world day observations [PDF]
, 2004 We report the observation and analysis of ionization flashes associated with the decay of meteoroids (so-called head echos) detected by the Arecibo 430 MHz radar during regular ionospheric observations in the spring and autumn equinoxes.
M. P. Sulzer
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Feasibility of an Incoherent-scatter Radar Aboard the Space Shuttle [PDF]
The results of a preliminary study to investigate the feasibility of conducting an incoherent scatter radar experiment on board the space shuttle are presented. The results indicate that such an experiment is technically feasible.
Baron, M. J. +3 more
core +1 more source
, 2019 Baseline generation for tracking applications is a difficult task when working with real world radar data. Data sparsity usually only allows an indirect way of estimating the original tracks as most objects' centers are not represented in the data.
Appenrodt, Nils +6 more
core +1 more source
Ionospheric clutter mitigation using one-dimensional or two-dimensional wavelet processing
IET Radar, Sonar & Navigation, 2009 Ionospheric clutter mitigation is an important issue for high-frequency surface wave radar (HFSWR) signal processing. Clutter results from a sky wave propagation mode, which is backscattered by ionospheric ionisation irregularities. The random behaviour and the high strength of clutter signals can strongly limit the HFSWR detection capabilities.
Jangal, Florent +2 more
openaire +1 more source
Electromagnetic Wave Theory and Applications [PDF]
Contains table of contents for Section 3, research summary and reports on six research projects.Joint Services Electronics Program (Contract DAAL 03-86-K-0002)Joint Services Electronics Program (Contract DAAL 03-89-C-0001)U.S.
Ali, Sami M. +21 more
core +3 more sources
SAR Observation of Ionosphere Using Range/Azimuth Sub-Bands [PDF]
, 2014 In SAR applications, the ionosphere is normally considered as a disturbance that has to be removed or compensated for. In this paper the ionosphere is the objective of observation.
Kim, Jun Su +1 more
core
Topside Measurements at Jicamarca During the 2019-2020 Deep Solar Minimum. [PDF]
J Geophys Res Space Phys, 2021 Derghazarian S, Hysell DL, Varney RH.
europepmc +1 more source