Results 11 to 20 of about 3,029 (137)
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
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
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 Occhipinti G +4 more
europepmc +2 more sources
A CFAR‐like detector based on neural network for simulated high‐frequency surface wave radar data
IET Radar, Sonar &Navigation, Volume 17, Issue 5, Page 859-875, May 2023., 2023 This article presents a deep neural network‐based constant false alarm rate detector for high‐frequency surface wave radar. A deep neural network is trained to identify fluctuation parameters of each cell of a range‐Doppler power spectrum based on the patterns present in the neighbouring cells.
Rômulo Fernandes da Costa +3 more
wiley +1 more source
IET Radar, Sonar &Navigation, Volume 17, Issue 4, Page 701-718, April 2023., 2023 Abstract The high‐frequency (HF) hybrid sky‐surface wave system is a new early warning radar. However, due to the influence of bistatic angle and ionospheric phase path disturbance, the echo spectrum will be widened, which seriously affects the ability of detecting slow targets of ships.
Yajun Li +5 more
wiley +1 more source
Impacts of Auroral Precipitation on HF Propagation: A Hypothetical Over‐the‐Horizon Radar Case Study
Space Weather, Volume 19, Issue 12, December 2021., 2021 Abstract Over‐the‐horizon radar (OTHR) systems operating in the high‐frequency (HF) band (3–30 MHz) are unique in their ability to detect targets at extreme ranges, offering cost‐effective large‐area surveillance. Due to their reliance on the reflective nature of the ionosphere in this band, OTHR systems are extremely sensitive to ionospheric ...
Joshua J. Ruck, David R. Themens
wiley +1 more source
Challenges in Specifying and Predicting Space Weather
Space Weather, Volume 19, Issue 2, February 2020., 2021 Abstract Physics‐based Data Assimilation (DA) has been shown to be a powerful technique for specifying and predicting space weather. However, it is also known that different data assimilation models simulating the same geophysical event can display different space weather features even if the same data are assimilated.
R. W. Schunk +10 more
wiley +1 more source
Time-varying autoregressive (TVAR) models for multiple radar observations [PDF]
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Abramovich, Yuri +2 more
core +1 more source
LED lighting systems for smart buildings: a review
IET Smart Cities, Volume 2, Issue 3, Page 126-134, September 2020., 2020 This study presents a review of smart light‐emitting diode (LED) lighting systems applied to smart buildings. The study is focused on drivers, protocols, technologies, communication networks and applications. An extended overview of the methodologies used for LED lighting control in smart buildings is addressed.
Héctor F. Chinchero +2 more
wiley +1 more source