Results 1 to 10 of about 541 (116)
The Journal of Engineering, 2019 Radars operating in the high-frequency (HF) band can exploit propagation modes other than line-of-sight and are hence widely employed to provide over-the-horizon surveillance and remote sensing.
Stuart Anderson
doaj +2 more sources
Societal Applications of HF Skywave Radar
Remote Sensing, 2022 After exploratory research in the 1950s, HF skywave ‘over-the-horizon’ radars (OTHR) were developed as operating systems in the 1960s for defence missions, notably the long-range detection of ballistic missiles, aircraft, and ships.
Stuart Anderson
doaj +2 more sources
Bistatic and Stereoscopic Configurations for HF Radar [PDF]
Remote Sensing, 2020 Most HF radars operate in a monostatic or quasi-monostatic configuration. The collocation of transmit and receive facilities simplifies testing and maintenance, reduces demands on communications networks, and enables the use of established and relatively
Stuart Anderson
doaj +2 more sources
HF Radar Wind Direction: Multiannual Analysis Using Model and HF Network
Remote Sensing, 2023 HF radar systems have the potential to measure the wind direction, in addition to surface currents and wave fields. However, studies on HF radar for wind direction determination are rare in the scientific literature.
Simona Saviano +7 more
doaj +4 more sources
Calibration of Phased-Array High-Frequency Radar on an Anchored Floating Platform
Remote Sensing, 2022 Prior studies have highlighted the importance of calibrating receiver antennas in target direction-of-arrival (DOA) estimation and surface current measurement for high-frequency (HF) radar systems.
Bin Wan +4 more
doaj +1 more source
SuperDARN radar HF propagation and absorption response to the substorm expansion phase [PDF]
Annales Geophysicae, 2002 Coherent scatter HF ionospheric radar systems such as SuperDARN offer a powerful experimental technique for the investigation of the magnetospheric substorm.
J. K. Gauld +6 more
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Remote Sensing of the Polar Ice Zones with HF Radar
Remote Sensing, 2021 Radars operating in the HF band are widely used for over-the-horizon remote sensing of ocean surface conditions, ionospheric studies and the monitoring of ship and aircraft traffic.
Stuart Anderson
doaj +1 more source
Finland HF and Esrange MST radar observations of polar mesosphere summer echoes [PDF]
Annales Geophysicae, 2003 Peculiar near range echoes observed in summer with the SuperDARN HF radar in Finland are presented. The echoes were detected at four frequencies of 9, 11, 13 and 15 MHz at slant ranges of 105–250 km for about 100 min.
T. Ogawa +4 more
doaj +1 more source
Estimating Coastal Winds by Assimilating High-Frequency Radar Spectrum Data in SWAN
Sensors, 2021 Many activities require accurate wind and wave forecasts in the coastal ocean. The assimilation of fixed buoy observations into spectral wave models such as SWAN (Simulating Waves Nearshore) can provide improved estimates of wave forecasts fields.
Philip Muscarella +2 more
doaj +1 more source
Arctic and Antarctic polar mesosphere summer echoes observed with oblique incidence HF radars: analysis using simultaneous MF and VHF radar data [PDF]
Annales Geophysicae, 2004 Polar mesosphere summer echoes (PMSEs) have been well studied using vertical incidence VHF radars at northern high-latitudes. In this paper, two PMSE events detected with the oblique incidence SuperDARN HF radars at Hankasalmi, Finland (62.3° N) and ...
T. Ogawa +6 more
doaj +1 more source