Results 71 to 80 of about 238,197 (181)
Estimating Coastal Winds by Assimilating High-Frequency Radar Spectrum Data in SWAN. [PDF]
Sensors (Basel), 2021 Muscarella P, Brunner K, Walker D.
europepmc +1 more source
Advanced 2-frequency ocean sensing radar using high resolution antenna beams [PDF]
, 1985 The opportunity to use a large space antenna system for remote sensing applications permits the creation of an advanced ocean sensing radar that combines the abilities of previously developed techniques.
Johnson, J. W., Weissman, D. E.
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Chip-based photonic radar for high-resolution imaging
, 2019 Radar is the only sensor that can realize target imaging at all time and all weather, which would be a key technical enabler for future intelligent society.
Cong, Rong +8 more
core
High-resolution three-dimensional imaging radar [PDF]
, 2010 A three-dimensional imaging radar operating at high frequency e.g., 670 GHz, is disclosed. The active target illumination inherent in radar solves the problem of low signal power and narrow-band detection by using submillimeter heterodyne mixer receivers.
Chattopadhyay, Goutam +6 more
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Tsunami Arrival Detection with High Frequency (HF) Radar
Remote Sensing, 2012 Quantitative real-time observations of a tsunami have been limited to deep-water, pressure-sensor observations of changes in the sea surface elevation and observations of sea level fluctuations at the coast, which are essentially point measurements ...
Donald Barrick +3 more
doaj +1 more source
Elimination of range-aliased echoes in the VHF radars [PDF]
Very high frequency radars designed to measure tropospheric wind profiles usually detect scattering to a maximum height of about 20 km. If the antenna elevation angle is 45 degrees or more above the horizon, the maximum range of interest is less than 30 ...
Strauch, R. G.
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Complementary code and digital filtering for detection of weak VHF radar signals from the mesoscale [PDF]
, 1983 The SOUSY-VHF-Radar operates at a frequency of 53.5 MHz in a valley in the Harz mountains, Germany, 90 km from Hanover. The radar controller, which is programmed by a 16-bit computer holds 1024 program steps in core and controls, via 8 channels, the ...
Czechowsky, P., Ruster, R., Schmidt, G.
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IEEE Journal of MicrowavesThis article compares two SiGe Colpitts quadrature voltage-controlled oscillators (QVCO) with different coupling techniques in the low E-Band, intended to be used as signal sources for push-push frequency doublers.
David Starke +4 more
doaj +1 more source
High-Accuracy Linearity Measurement of Broadband Frequency Chirps
IEEE Open Journal of Instrumentation and MeasurementHigh-resolution radar systems use fast and broadband frequency chirps to enable high resolutions with short measurement times. One challenge in these radar systems is minimizing the linearity error in the generated frequency chirps, directly influencing ...
Bent Walther +3 more
doaj +1 more source
Beyond the horizon: High Frequency Surface Wave Radar
1st MARITIME SITUATIONAL AWARENESS WORKSHOP (MSAW 2019), 2019 In this paper, we present a high-level view of the High Frequency Surface Wave Radar developed for the Radars for long distance maritime surveillance and SAR operations (RANGER) project ([1]). The over-the-horizon radar proposes a new system architecture, with new waveforms, new processing methods, and new antenna concepts to provide solutions to meet ...
Lamole Frédéric +2 more
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