Results 31 to 40 of about 756,404 (200)

History of EISCAT – Part 6: the participation of Japan in the EISCAT Scientific Association [PDF]

History of Geo- and Space Sciences, 2023
In Sect. 1, the original planning of Japanese Svalbard IS (incoherent scatter) radar with phased-array antennas is described. In 1988, this plan was proposed as one of the major projects for the forthcoming Solar–Terrestrial Environment Laboratory ...
N. Matuura, N. Matuura, R. Fujii, S. Nozawa   +3 more
doaj   +1 more source

Preliminary Results of the Three-Dimensional Plasma Drift Velocity at East Asian Low-Latitudes Observed by the Sanya Incoherent Scattering Radar (SYISR)

Remote Sensing, 2023
As the first advanced modular phase array incoherent scatter radar (ISR) established in the Eastern Hemisphere at low latitudes, Sanya ISR (SYISR) can measure the line-of-sight (LOS) velocity of ion drift in multiple directions, potentially yielding the ...
Yuyan Jin, Biqiang Zhao, Honglian Hao, Xinan Yue, Feng Ding, Baiqi Ning, Lingqi Zeng, Zishen Li   +7 more
doaj   +1 more source

Multipurpose incoherent scatter measurement and data analysis techniques for EISCAT3D [PDF]

Atmospheric Measurement Techniques
EISCAT3D will be a high-power, high-duty-cycle, large-aperture multistatic radar system with digitally steerable aperture array antennas and solid-state transmitters.
I. I. Virtanen, A. Nigusie, A. Kero, N. Thomas, J. Lankinen   +4 more
doaj   +1 more source

Automated detection of satellite contamination in incoherent scatter radar spectra [PDF]

Annales Geophysicae, 2003
Anomalous ion line spectra have been identified in many experiments. Such spectra are defined as deviations from the standard symmetric "double-humped" spectra derived from incoherent scatter radar echoes from the upper atmosphere. Some
J. Porteous, A. M. Samson, K. A. Berrington, I. W. McCrea   +3 more
doaj   +1 more source

D- and E-region effects in the auroral zone during a moderately active 24-h period in July 2005 [PDF]

, 2007
International audienceThe effects of energetic electron precipitation into the auroral region at a time of enhanced solar wind have been investigated during a continuous period of 24 h, using the European Incoherent Scatter (EISCAT) radar, an imaging ...
Birch, M. J., B. J. I. Bromage, Bromage, B. J. I., Hargreaves, J. K., J. K. Hargreaves, M. J. Birch, Birch, Martin John   +6 more
core   +2 more sources

VHF coherent radar signals from the E region ionosphere and the relationship to electron drift velocity and ion acoustic velocity [PDF]

, 2002
The Scandinavian Twin Auroral Radar Experiment (STARE) coherent radar system measures the Doppler shifts caused by ∼1 m plasma waves in the high-latitude E region ionosphere.
Nielsen, E., Del-Pozo, Carlos, Williams, P. J. S.   +2 more
core   +4 more sources

A localised co-rotating auroral absorption event observed near noon using imaging riometer and EISCAT [PDF]

, 1996
International audienceAn isolated region of energetic electron precipitation observed near local noon in the auroral zone has been investigated using imaging riometer (IRIS) and incoherent-scatter radar (EISCAT) techniques.
P. N. Collis, G. P. White, White, G. P., Collis, P. N., White, G.P., Hargreaves, J.K., Hargreaves, J. K., J. K. Hargreaves, Collis, P.N.   +8 more
core   +2 more sources

Combined EISCAT radar and optical multispectral and tomographic observations of black aurora [PDF]

, 2008
Black auroras are recognized as spatially well-defined regions within a uniform diffuse auroral background where the optical emission is significantly reduced.
Senior, Andrew, Gustavsson, B., Kosch, Mike J., Brändström, B. U. E., Blixt, E. M., Kavanagh, Andrew J.   +5 more
core   +2 more sources

Ground-based observations of the auroral zone and polar cap ionospheric responses to dayside transient reconnection [PDF]

Annales Geophysicae, 2002
Observations from the EISCAT VHF incoherent scatter radar system in northern Norway, during a run of the common programme CP-4, reveal a series of poleward-propagating F-region electron density enhancements in the pre-noon sector on 23 November ...
J. A. Davies, J. A. Davies, T. K. Yeoman, I. J. Rae, I. J. Rae, S. E. Milan, M. Lester, M. Lockwood, A. McWilliams   +8 more
doaj   +1 more source

Imaging high-latitude plasma density irregularities resulting from particle precipitation: spaceborne L-band SAR and EISCAT observations

Earth, Planets and Space, 2018
High-latitude, small-scale plasma density irregularities are observed by the Advanced Land Observation Satellite 2, Phase Array type L-band Synthetic Aperture Radar-2 and the European Incoherent Scatter radar in Tromsø, Norway.
Hiroatsu Sato, Jun Su Kim, Norbert Jakowski, Ingemar Häggström   +3 more
doaj   +1 more source