Results 11 to 20 of about 127,490,332 (269)
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 +7 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
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
doaj +1 more source
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
doaj +1 more source
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
doaj +1 more source
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
doaj +1 more source
Impacts of Auroral Precipitation on HF Propagation: A Hypothetical Over‐the‐Horizon Radar Case Study
Space Weather, 2021 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
Joshua J. Ruck, David R. Themens
doaj +1 more source
Hepatology, EarlyView., 2022 Increased liver content of DHA‐derived small lipid autacoids (i.e resolvin D1 and maresin 1) associates with enhanced mitochondrial oxidative phosphorylation, fatty acid β‐oxidation and bioenergetic metabolic flux. These features provide hepatic protection from steatotic, pro‐inflammatory and fibrogenic insults.
Cristina López‐Vicario +12 more
wiley +1 more source
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
doaj +1 more source
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
doaj +1 more source