Results 11 to 20 of about 182,284 (271)
Seasonal Variation in Land and Sea Surface Backscatter Coefficients at High Frequencies
Remote Sensing, 2022 Over the horizon radars (OTHR) rely on the propagation of high frequency (HF) radio waves via the ionosphere to successfully achieve their designated missions.
Danielle Edwards, Manuel Cervera
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IET Radar, Sonar & Navigation, 2023 Since solving the path of radio wave propagation by an analytic method in the process of coordinate registration (CR) for skywave over‐the‐horizon radar (OTHR) is difficult, a reference source‐aided CR method that uses ensemble learning is proposed ...
Zhenshuo Lei +5 more
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Two‐dimensional transmit arrays for polar over‐the‐horizon radar
IET Radar, Sonar & Navigation, 2021 Two‐dimensional (2‐D) transmit arrays offer many advantages over traditional over‐the‐horizon radar (OTHR) arrays, including the capability to steer and mitigate auroral clutter, a clutter type prevalent in polar operation, in all azimuth and elevation ...
Simon Henault, Ryan J. Riddolls
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Utö Observatory for Analysing Atmospheric Ducting Events over Baltic Coastal and Marine Waters
Remote Sensing, 2023 Maritime safety relies on navigation, detection, and radio communication technologies that function through electromagnetic radiation. Propagation of electromagnetic radiation can be impacted by a disruptive phenomenon known as ducting.
Laura Rautiainen +10 more
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Testing RFoF Link for Transmitting HF-OTHR Signal Between Transmitter and Receiver Shelters
Telfor Journal, 2021 HF-OTHR site contains two equipment shelters, up to 1 km away from each other, that need to be connected for transmitting a FMCW signal. This connection, if realized using a coaxial cable, has shown itself to be vulnerable to external electromagnetic ...
P. Petrović +6 more
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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.
Soraghan, J. J. +5 more
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Research on a Simulation Model of a Skywave Over-the-Horizon Radar Sea Echo Spectrum
Remote Sensing, 2022 The capability of a skywave over-the-horizon radar (SWR) to achieve the continuous observation of a wide range of ocean dynamics parameters via a single ionospheric reflection has been demonstrated by many scholars.
Mengyan Feng +8 more
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Design and simulation of carrier-borne fighter multi-sensor co-detection model [PDF]
Zhihui kongzhi yu fangzhen, 2023 In order to improve the operational effectiveness of multi-sensor cooperative detection of carrier-borne fighter, based on the scene of air interception, according to the combat airspace from far to near, the scene model of the extended range search of ...
LI Taotao, GAO Weiliang, WANG Yongkun, SHEN Junbao, CHENG Huan
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IEEE Access, 2022 Over-the-horizon radar (OTHR) is an important equipment for the ultralong-range early warning in the military, but the use of constant false-alarm rate (CFAR), which is a traditional detection method, makes it difficult in multi-aircraft formation ...
Futai Liang +4 more
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Frontiers in Astronomy and Space Sciences, 2022 Multiple propagation modes between different bistatic radar links were measured during the operations of a very high frequency (VHF) 32.55 MHz radar system in northern Norway. The Spread Spectrum Interferometric Multistatic meteor radar Observing Network
Devin Huyghebaert +6 more
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