Results 11 to 20 of about 21,397 (182)
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
Joint Estimation of MIMO-OTH Radar Measurements and Ionospheric Parameters
IEEE Transactions on Aerospace and Electronic Systems, 2017 To avoid the disadvantage of the traditional over-the-horizon (OTH) radar, which uses only the measurements of ionospheric parameters obtained from an ionosonde to estimate the target parameters, this paper proposes a new multiple-input multiple-output skywave OTH radar, which estimates the ionospheric and target parameters jointly by exploiting the ...
Jianbin Hu +4 more
openaire +3 more sources
Tsunami signature in the ionosphere: A simulation of OTH radar observations [PDF]
Radio Science, 2011 In the last ten years ionospheric anomalies following major earthquakes and tsunamis have been detected. Global Positioning System (GPS) and altimeters have been proven effective for this purpose, through Total Electron Content (TEC) measurement. Most of these ionospheric anomalies are deterministic and reproducible by numerical modeling via the ...
Coïsson, Pierdavide +4 more
openaire +3 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
CAAI Transactions on Intelligence Technology, Volume 8, Issue 4, Page 1237-1257, December 2023., 2023 Abstract Recently, ground coverings change detection (CD) driven by bitemporal hyperspectral images (HSIs) has become a hot topic in the remote sensing community. There are two challenges in the HSI‐CD task: (1) attribute feature representation of pixel pairs and (2) feature extraction of attribute patterns of pixel pairs.
Chengle Zhou +5 more
wiley +1 more source
Postal survey of contacts between cattle farms on the Isle of Lewis [PDF]
, 2010 The British Cattle Movement Service (BCMS) database contains an unprecedented quantity of data on the movement of cattle within the UK. These data may be used to construct models of the contact structure of the UK cattle herd, for epidemiological ...
Heath, M. Fred +2 more
core +1 more source
Journal of Applied Mathematics, 2014 Skywave over-the-horizon (OTH) radar systems have important long-range strategic warning values. They exploit skywave propagation reflection of high frequency signals from the ionosphere, which provides the ultra-long-range surveillance capabilities to ...
Hou Chengyu, Wang Yuxin, Chen Jiawei
doaj +1 more source
Maritime Over the Horizon Sensor Integration: HFSWR Data Fusion Algorithm
Remote Sensing, 2019 In order to provide a constant and complete operational picture of the maritime situation in the Exclusive Economic Zone (EEZ) at over the horizon (OTH) distances, a network of high frequency surface-wave-radars (HFSWR) slowly becomes a necessity.
Dejan Nikolic +6 more
doaj +1 more source