Results 1 to 10 of about 34,527 (227)
HF Radar Sea-echo from Shallow Water [PDF]
Sensors, 2008 HF radar systems are widely and routinely used for the measurement of ocean surface currents and waves. Analysis methods presently in use are based on the assumption of infinite water depth, and may therefore be inadequate close to shore where the radar ...
Josh Kohut +3 more
doaj +4 more sources
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 +14 more sources
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
Space Surveillance with High-Frequency Radar [PDF]
SensorsHigh-Frequency (HF) radar is well suited to the surveillance of low-earth-orbit space. For large targets, a small deployable HF radar is able to match the detection performance of much larger space surveillance radar systems operating at higher ...
Brendan Hennessy +8 more
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
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
Recent technical innovations around HF radar technology and steps towards integrated national HF radar networks [PDF]
Instrumentation viewpoint, 2016 Peer ...
López, Ismael +6 more
openaire +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
doaj +1 more source
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