Software-defined radio-based HF doppler receiving system [PDF]
Earth, Planets and Space, 2021 High-frequency Doppler (HFD) sounding is one of the major remote sensing techniques used for monitoring the ionosphere. Conventional systems for HFDs mainly utilize analog circuits.
Hiroyuki Nakata +8 more
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Fifty Years of HF Doppler Observations
Data Science Journal, 2009 High frequency Doppler observations of the ionosphere began in August of 1957 in Kyoto. The number of the observation points worldwide were about 40 in 1980 and are about 20 at present.
T Ogawa, T Ichinose
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Inversion of HF Radar Doppler Spectra Using a Neural Network [PDF]
Journal of Marine Science and Engineering, 2019 For a number of decades, coastal HF radar has been used to remotely measure ocean surface parameters, including waves, at distances exceeding 100 km. The information, which has value in many ocean engineering applications, is obtained using the HF radar ...
Rachael L. Hardman, Lucy R. Wyatt
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Doppler shift simulation of scattered HF signals during the Tromsø HF pumping experiment on 16 February 1996 [PDF]
Annales Geophysicae, 2002 Comparisons between bistatic scatter measurements and simulation results during the Tromsø HF pumping experiment on 16 February 1996 are made. Doppler measurements of an HF diagnostic signal scattered from the field-aligned irregularities (FAIs) in
T. D. Borisova +7 more
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A comparison of EISCAT and HF Doppler observations of a ULF wave [PDF]
Annales Geophysicae, 1998 Since the middle of 1995, an HF Doppler sounder has been running almost continuously in northern Norway, with the receiver at Ramfjordmoen and the transmitter at Seljelvnes.
D. M. Wright, T. K. Yeoman, J. A. Davies
doaj +5 more sources
Ionospheric Doppler measurements by means of HF-radar techniques
Annals of Geophysics, 2005 Studies of the dynamics of the ionosphere and its related phenomena are mainly based on Doppler Drift measurements. The time variation (ionisation/recombination) of plasma density, thermospheric wind and others can be observed by means of HF-radars.
D. Altadill, C. Bianchi
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Assessing the quality of ionogram interpretation using the HF Doppler technique [PDF]
Annales Geophysicae, 2007 The first joint common volume measurements by the Digisonde Portable Sounder (DPS-4) and a new Doppler type system has been run at the Pruhonice ionospheric observatory (49.99° N, 14.54° E) since January 2004.
D. Buresova +7 more
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History of the Super Dual Auroral Radar Network (SuperDARN)-I: pre-SuperDARN developments in high frequency radar technology for ionospheric research and selected scientific results [PDF]
History of Geo- and Space Sciences, 2021 Part I of this history describes the motivations for developing radars in the high frequency (HF) band to study plasma density irregularities in the F region of the auroral zone and polar cap ionospheres.
R. A. Greenwald
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Journal of the American Heart Association: Cardiovascular and Cerebrovascular Disease, 2023 Background The impact of changes in Doppler‐derived kidney venous flow in heart failure (HF) is not well studied. We aimed to investigate the association of Doppler‐derived kidney venous stasis index (KVSI) and intrakidney venous‐flow (IKVF) patterns ...
Faeq Husain‐Syed +16 more
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Observations and modelling of the wave mode evolution of an impulse-driven 3 mHz ULF wave [PDF]
Annales Geophysicae, 2010 A combination of an HF Doppler sounder, a network of ground magnetometers, upstream solar wind monitors and a numerical model is used to examine the temporal evolution of an Ultra Low Frequency (ULF) wave.
J. D. Borderick +3 more
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