Direction Finding Techniques for Over‐the‐Horizon Radars
IET Radar, Sonar & NavigationThere is no ultimate intelligence‐gathering discipline. Intelligence products almost always require multiple sources for further analytical processing.
M. Pacek +3 more
doaj +2 more sources
Distributed Shipborne HFHSSWR Localisation Method Based on Gaussian Markov Fields
IET Radar, Sonar & NavigationThis 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.
Longyuan Xu +3 more
doaj +2 more sources
Over‐the‐Horizon Direct Positioning With Ionospheric Heights Priors
IET Radar, Sonar & NavigationThis study addresses positioning errors in high‐frequency (HF) over‐the‐horizon (OTH) localisation that arise from inaccuracies in ionospheric virtual height measurements.
Shuyu Zheng, Haiying Zhang, Xiuquan Dou
doaj +2 more sources
Surface waves magnitude estimation from ionospheric signature of Rayleigh waves measured by Doppler sounder and OTH radar. [PDF]
Sci Rep, 2018 International audienceSurface waves emitted after large earthquakes are known to induce atmospheric infrasonic waves detectable at ionospheric heights using a variety of techniques, such as high frequency (HF) Doppler, global positioning system (GPS ...
Occhipinti G +4 more
europepmc +2 more sources
Assessing Loggerhead Turtle Exposure to Fisheries in Northwest Africa: Predicted Risk and Management Gaps. [PDF]
Ecol EvolBiologging and Global Fishing Watch data reveal extensive spatial and vertical overlap between loggerhead turtles from the Cabo Verde population and fisheries across the Northeast Atlantic, highlighting areas of high predicted bycatch risk and gaps in current protections. ABSTRACT Bycatch is the accidental capture of non‐target animals in fishing gear,
Bowler AI +7 more
europepmc +2 more sources
Developments in target micro-Doppler signatures analysis : radar imaging, ultrasound and through-the-wall radar [PDF]
, 2013 Target motions, other than the main bulk translation of the target, induce Doppler modulations around the main Doppler shift that form what is commonly called a target micro-Doppler signature.
Woodbridge, K. +3 more
core +5 more sources
The dependence of radar target detectability on array weighting function [PDF]
, 2009 Presented at the IET-Radar 2007 Conference Edinburgh 15-18 October 2007This paper describes simulation work to assess the detectability of targets by an airborne fire control radar (FCR) operating in a medium pulse repetition frequency (PRF) mode in ...
Alabaster, Clive M., Hughes, Evan J.
core +4 more sources
Array self-calibration for sky-wave over-the-horizon radar with gain-phase errors
The Journal of Engineering, 2019 This study proposes a novel algorithm for sky-wave over-the-horizon (OTH) radar array self-calibration with angle-independent gain-phase errors. The proposed method exploits backscattered echo from an ionised meteor trail, which can be considered as ...
Baiqiang Zhang, Junhao Xie
doaj +1 more source
A general presentation about the OTH-Radar NOSTRADAMUS
, 2006 International audienceONERA, funded by the French Ministry of Defence has conducted the realization and experimentations of the Doppler Skywave OTH Radar called NOSTRADAMUS.
Dorey, P. +15 more
core +1 more source
Performance Analysis of a Sky-Wave Over-the Horizon Radar Simulation Tools
Revista ElektrónThis paper presents the main features of a skywave over-the-horizon radar simulation software and results on its ability to represent and detect different search scenarios.
Zenon Saavedra +4 more
doaj +1 more source