Results 151 to 160 of about 2,062 (173)
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HF radar receiver designed for surface current radar system
10th IET International Conference on Ionospheric Radio Systems and Techniques (IRST 2006), 2006The paper presents the design methods of the HF radar receiver for the short-range Ocean State Measuring and Analyzing. The radar system adopts Frequency Modulated Interrupted Continuous Waveform (FMICW) and operates at 12∼14MHz. The receiver has only once mixing and band-pass sampling structure.
null Shen Wei +5 more
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Surface wave HF radar simulator
Radar Systems (RADAR 97), 1997A computer code is described which has been developed for the simulation of surface wave high frequency (SW-HF) radar. The aim is to investigate the problems related to the detection and tracking of surface targets at beyond the horizon ranges. In SW-HF radar target detection involves stochastic features such as target RCS fluctuations, atmospheric ...
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Ionospheric probing with an HF radar
Electronics & Communication Engineering Journal, 1989The Jindalee over-the-horizon (OTH) radar is designed primarily for extended air defence surveillance of Australia's northern coastline. It achieves its long-range capability by employing ionospheric reflection. This use of the ionosphere allows the radar to have a powerful secondary role in remote sensing because information about the ionosphere can ...
M.L. Lees, R.M. Thomas
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2011 IEEE/OES 10th Current, Waves and Turbulence Measurements (CWTM), 2011
This paper briefly reviews the theory behind wave measurement with HF radar. Data from a number of different deployments with different radars, at different frequencies, in different oceanographic conditions are used to demonstrate the wave mapping capability and to illustrate some of the problems that have arisen and solutions that have been ...
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This paper briefly reviews the theory behind wave measurement with HF radar. Data from a number of different deployments with different radars, at different frequencies, in different oceanographic conditions are used to demonstrate the wave mapping capability and to illustrate some of the problems that have arisen and solutions that have been ...
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HF radar optimised for tsunami monitoring
OCEANS 2015 - Genova, 2015Recent reports have shown high-frequency (HF) radar measurements of tsunami signatures as the disturbance propagates from deep water to shallow water across the edge of the continental shelf. Most HF radars are optimised in various ways to measure seasonal circulation, tidal currents or sub-tidal structures.
Mal Heron +2 more
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HF Radar and Auroral Absorption
Radio Science, 1970A description is given of a method, based on riometer observations, for the calculation of auroral absorption of HF radio waves propagating over high‐latitude paths. Emphasis is on HF radar, but the method is appropriate for use in predicting circuit performance of high‐latitude HF communications.
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Target Detection Using HF Radar Data
OCEANS 2007 - Europe, 2007High frequency (HF) radar systems have a potential to detect targets which are located beyond the optical horizon on the sea surface. Unfortunately sea clutter may be strong enough to prevent such detection. In this work we present results of applying space-time adaptive processing (STAP) to this problem.
Tomasz Gorski +5 more
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Radio disturbance suppression for HF radar
IEE Proceedings - Radar, Sonar and Navigation, 2001A new method of single sample polarisation filtering is proposed. The algorithm is fast and suitable for the polarisation processing of stationary or nonstationary polarised disturbed signals with one or more independent sources of disturbance. A ground wave polarimetric radar with the ability of radio disturbance suppression is then introduced.
X.L. Qiao, M. Jin
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Presentation on HF radar SDC_metadata_for_discovery
2020Presentation for the management of the HF radar metadata for the syncronization of your HFR radar data into the EU HFR radar ...
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2003
The extraction of useful information from radar echoes cannot be accomplished solely within the domain of ‘direct’ problems, that is to say, the solution of Maxwell’s equations with prescribed boundary conditions. In general, the interpretation of radar returns involves the solution of inverse problems, which are essentially illposed, even in the ...
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The extraction of useful information from radar echoes cannot be accomplished solely within the domain of ‘direct’ problems, that is to say, the solution of Maxwell’s equations with prescribed boundary conditions. In general, the interpretation of radar returns involves the solution of inverse problems, which are essentially illposed, even in the ...
openaire +1 more source