Results 11 to 20 of about 1,770 (180)

A Quality Control Concept for Radar Reflectivity, Polarimetric Parameters, and Doppler Velocity [PDF]

, 2006
Over the last few years the use of weather radar data has become a fundamental part of various applications like rain-rate estimation, nowcasting of severe weather events, and assimilation into numerical weather prediction models.
Friedrich, Katja, Einfalt, Thomas, Hagen, Martin   +2 more
core   +1 more source

A Network of Portable, Low-Cost, X-Band Radars [PDF]

, 2012
Radar is a unique tool to get an overview on the weather situation, given its high spatio- temporal resolution. Over 60 years, researchers have been investigating ways for obtaining the best use of radar.
Allegretti, Marco, Andrea Prato, Marco Allegretti, Giovanni Pero, Prato, Andrea, Lucianaz, Claudio, Perona, Giovanni Emilio, Riccardo Notarpietro, Claudio Lucianaz, Marco Gabella, Notarpietro, Riccardo, Silvano Bertoldo, Oscar Rorato, Giovanni Perona, Gabella, Marco, Bertoldo, Silvano, Rorato, Oscar   +16 more
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D region HF radar echoes associated with energetic particle precipitation and pulsating aurora [PDF]

, 2008
Milan et al. (2001) identified a class of narrow, slow-moving HF radar backscatter echoes which originate between altitudes of 80 and 100 km, the ionospheric D- and lower E-regions.
Milan, S.E., S. E. Milan, K. Hosokawa, Yamagishi, H., N. Sato, Lester, M., F. Honary, Hosokawa, K., Honary, F., Sato, N., M. Lester, H. Yamagishi   +11 more
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Stereo CUTLASS-a new capability for the SuperDARN HF radars [PDF]

, 2004
International audienceThe Super Dual Auroral Radar Network (SuperDARN), which consists of networks of HF radars surrounding the northern and southern poles, has proven to be an extremely successful experimental technique in a wide range of scientific ...
S. W. H. Cowley, Crooks, S. J., M. J. Parsons (7590314), Hamadyk, P., S. W. H. Cowley (7590302), Thornhill, J. D., P. J. Chapman, N. M. Wade (7590326), D. B. Payne (7590317), Chapman, P. J., J. A. Davies (4412452), E. C. Thomas, T. K. Yeoman, S. J. Crooks (7590305), Thomas, E. C., N. M. Wade, Yeoman, T. K., S. J. Crooks, D. B. Payne, R. J. Barnes, J. A. Davies, E. C. Thomas (7590320), Tim K. Yeoman (7583066), McWilliams, K. A., Barnes, R. J., Milan, S. E., K. A. McWilliams, R. J. Barnes (7590329), Lester, M., P. Hamadyk (7590308), M. J. Parsons, Steve E. Milan (7589666), Payne, D. B., Wade, N. M., M. Lester, M. Lester (7589660), P. J. Chapman (7590299), K. A. McWilliams (7590311), Davies, J. A., S. E. Milan, Cowley, S. W. H., J. D. Thornhill, J. D. Thornhill (7590323), Parsons, M. J., P. Hamadyk   +44 more
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The Heights of Radar Meteors

Journal of geomagnetism and geoelectricity, 1991
Previous measurements of the heights of radio meteors using VHF radars have distributions peaking at around 95km with few meteors detected above 105km. Using HF radars (frequencies 2 and 6MHz) near Adelaide, South Australia, we have now shown that there are many more meteors than previously believed ablating at above 100km, with the peak being at 110 ...
STEEL, D., ELFORD, W. G.
openaire   +2 more sources

Recombination in Radar Meteors [PDF]

International Astronomical Union Colloquium, 1971
Recombination of the Electrons in the ionized column has often been considered (see, for example, Öpik, 1955), but the uncertainties in the atomic and molecular species present and in the rate constants have made it difficult to predict. Furthermore, recombination has not been recognized in the observations, so that it has been judged to be negligible (
openaire   +1 more source

Investigation of the relationship between optical auroral forms and HF radar E region backscatter [PDF]

, 2000
International audienceThe SuperDARN HF radars have been employed in the past to investigate the spectral characteristics of coherent backscatter from L-shell aligned features in the auroral E region.
Milan, S. E., N. Sato, Lester, M., H. Takizawa (7612496), Villain, J.-P., J. -p. Villain, Takizawa, H., M. Lester, N. Sato (7606136), Milan, S.E., S. E. Milan, Stephen E. Milan (7612220), J. P. Villain (7612424), J.-P. Villain, Mark Lester (6477935), Sato, N., H. Takizawa   +16 more
core   +1 more source

Observations on Stratospheric-Mesospheric-Thermospheric temperatures using Indian MST radar and co-located LIDAR during Leonid Meteor Shower (LMS) [PDF]

, 2001
International audienceThe temporal and height statistics of the occurrence of meteor trails during the Leonid meteor shower revealed the capability of the Indian MST radar to record large numbers of meteor trails.
R. Selvamurugan, Devasia, C. V., C. V. Devasia, C. Raghava Reddi, R. Sridharan, A. R. Jain, P. B. Rao, Jain, A. R., Rao, P. B., Selvamurugan, R., Raghava Reddi, C., Sridharan, R.   +11 more
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Meteor radar observations of polar mesospheric summer echoes over Svalbard [PDF]

, 2021
A 31 MHz meteor radar located in Svalbard was used to observe polar mesospheric echoes (PMSEs) during summer 2020. Data from 19 July were selected for detailed analysis, with a focus on extracting additional information to characterize the atmosphere in ...
Tsutsumi, Masaki, Reid, I.M., Younger, J.P., Hall, C.M., Younger, Joel P., Tsutsumi, M., Reid, Iain M., Hall, Chris M., Adami, Chris L., Adami, C.L.   +9 more
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Meteor observations with an MF radar [PDF]

Earth, Planets and Space, 2014
We conducted meteor echo observations using the Buckland Park MF radar (35°S, 138°E) at 00:40–05:45 LT on October 22, 1997. In addition to the usual full correlation analysis (FCA) technique to measure horizontal wind velocities from 60 to 100 km MF radars have a potential to detect meteor echoes and infer winds through their Doppler frequency shifts ...
Tsutsumi, M., Holdsworth, D., Nakamura, T., Reid, I.   +3 more
openaire   +2 more sources