Results 181 to 190 of about 817,854 (220)
Some of the next articles are maybe not open access.
1970
Abstract : Aircraft, ship, and clutter echoes have been studied using surface- wave propagation on the Chesapeake Bay. These studies show that coherent pulse doppler methods can be used for surface target detection. Required radar features for several applications can be estimated.
Frank E. Boyd +3 more
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Abstract : Aircraft, ship, and clutter echoes have been studied using surface- wave propagation on the Chesapeake Bay. These studies show that coherent pulse doppler methods can be used for surface target detection. Required radar features for several applications can be estimated.
Frank E. Boyd +3 more
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1970
Abstract : Interference to communication reception near an HF radar is dependent on many factors. It is shown that the most important of these that can be controlled is the pulse shape of the radar. Under optimum conditions, acceptable reception should be possible with frequency separation as little as 21 kHz from the proposed radar.
Burton N. Navid, Frank E. Boyd
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Abstract : Interference to communication reception near an HF radar is dependent on many factors. It is shown that the most important of these that can be controlled is the pulse shape of the radar. Under optimum conditions, acceptable reception should be possible with frequency separation as little as 21 kHz from the proposed radar.
Burton N. Navid, Frank E. Boyd
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Journal of Atmospheric and Terrestrial Physics, 1985
Abstract This paper provides an overview of six poster presentations contributed to the Open Symposium on Active Experiments in Space Plasmas at the XXIst General Assembly of URSI. The six poster presentations deal with HF ionospheric modification and are primarily experimental in nature.
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Abstract This paper provides an overview of six poster presentations contributed to the Open Symposium on Active Experiments in Space Plasmas at the XXIst General Assembly of URSI. The six poster presentations deal with HF ionospheric modification and are primarily experimental in nature.
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Sixth International Conference on `HF Radio Systems and Techniques', 1994
HF over-the-horizon radars often use CW transmissions comprising repeated linear FM sweeps. The resolution and sidelobe performance in the range dimension are determined within each sweep, but Doppler information is extracted by processing together the outputs of a number of sweeps.
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HF over-the-horizon radars often use CW transmissions comprising repeated linear FM sweeps. The resolution and sidelobe performance in the range dimension are determined within each sweep, but Doppler information is extracted by processing together the outputs of a number of sweeps.
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The availability and accuracy of HF radar wave measurements
IEEE International Geoscience and Remote Sensing Symposium, 2003The possibility of measuring the ocean wave directional spectrum in real time at up to 350 locations every 10 minutes was demonstrated in the EuroROSE experiments at Fedje, Norway and Gijon, Spain in 2000. These experiments used the WERA HF radar which, at the operating frequency used, had a maximum range for wave measurements of about 20 km. Trials of
Lucy R. Wyatt, J. Jim Green
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On the design of a 2D array HF skywave radar
2008 IEEE Radar Conference, 2008New generation of HF skywave radars moves toward 2D array solution to get high signal to noise ratio (SNR), low probability of intercept (LPI), precise electronic scanning, faster scanning time. Critical elements for the design of such a system are radar configuration, antenna design, transmission waveforms and architecture, signal processing, radar ...
BERIZZI, FABRIZIO +4 more
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A Novel Radar Waveform Design for a Low-Power HF Monostatic Radar
IEEE Geoscience and Remote Sensing Letters, 2015In this letter, a novel radar waveform is proposed for a low-power high-frequency monostatic radar used for ionospheric sensing and aircraft detection. In this proposed waveform, a hybrid modulation scheme is adopted, where the pulse-to-pulse phase is coded by the WG sequence, and the frequency of each subpulse is linearly modulated with a fixed chirp ...
Shuzhu Shi +3 more
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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 ...
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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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Guidelines on how to sync your High Frequency (HF) radar data with the European HF Radar node
2019A step-by-step guide to help High-Frequency (HF) radar data providers synchronize their near real-time native data files or standard NetCDF datasets to the European HF radar node and, from there, to other data distribution portals (Copernicus Marine Service, EMODnet-Phys and SeaDataNet)
Reyes, Emma +5 more
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