Results 91 to 100 of about 3,881 (215)

A decametric wavelength radio telescope for interplanetary scintillation observations [PDF]

A phased array, electrically steerable radio telescope (with a total collecting area of 18 acres), constructed for the purpose of remotely sensing electron density irregularity structure in the solar wind, is presented.
Cronyn, W. M., Shawhan, S. D.
core   +1 more source

Coronal Mass Ejections - Propagation Time and Associated Internal Energy

, 2010
In this paper, we analyze 91 coronal mass ejection (CME) events studied by Manoharan et al. (2004) and Gopalswamy and Xie (2008). These earth-directed CMEs are large (width $>$160$^\circ$) and cover a wide range of speeds ($\sim$120--2400 {\kmps}) in the
A. Mujiber Rahman, Chashei, Chen, Cho, Gonzalez-Esparza, Gopalswamy, Gopalswamy, Gopalswamy, Gopalswamy, Howard, Jones, Joshi, Kumar, Manoharan, Manoharan, Manoharan, Manoharan, Manoharan, Metcalf, Michalek, P.K. Manoharan, Richardson, Tokumaru, Tsurutani, Vlasov, Xie   +25 more
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The Behaviors of Ionospheric Scintillations Around Different Types of Nightside Auroral Boundaries Seen at the Chinese Yellow River Station, Svalbard

Frontiers in Astronomy and Space Sciences, 2018
Dynamical nightside auroral structures are often observed by the all sky imagers (ASI) at the Chinese Yellow River Station (CYRS) at Ny-Ålesund, Svalbard, located in the polar cap near poleward edge of the nightside auroral oval.
Shishir Priyadarshi, Qing-He Zhang, Yuzhang Ma, Zanyang Xing, Ze-Jun Hu, Guozhu Li   +5 more
doaj   +1 more source

The interplanetary hydrogen and helium glow and the inferred interstellar gas properties [PDF]

, 1983
Observations of the interplanetary hydrogen and helium glow have been obtained by a number of spacecraft and rocket experiments during the past fifteen years.
Judge, D. L.
core   +1 more source

Telecommunications in cometary environments [PDF]

Propagation effects on telecommunications in a cometary environment include those due to dust, the inhomogeneous plasma of the coma and tail, and ionization generated by impact of neutral molecules and dust on the spacecraft.
Flock, W. L.
core   +1 more source

Evolution of Anemone AR NOAA 10798 and the Related Geo-Effective Flares and CMEs

, 2008
We present a detailed examination of the features of the Active Region (AR) NOAA 10798. This AR generated coronal mass ejections (CMEs) that caused a large geomagnetic storm on 24 August 2005 with the minimum Dst index of -216 nT.
Alexander, Asai, Asai, Ayumi Asai, Bruzek, Delaboudiniére, Domingo, Forsyth, Gopalswamy, Gopalswamy, Gopalswamy, Gopalswamy, Gopalswamy, Gosling, Hale, Ishii, Kataoka, Kazunari Shibata, Ken'ichi Fujiki, Kojima, Kokubun, Kundu, Kurokawa, Lepping, Liu, Liu, Low, López Fuentes, Manoharan, Martin, Matsumoto, Mitsuo Oka, Mukai, Munro, Nagashima, Nat Gopalswamy, Rust, Ryuho Kataoka, Saito, Saito, Scherrer, Sheeley, Sheeley, Sheeley, Shibata, Shibata, Shibata, Takahashi, Takako T. Ishii, Terasawa, Tian, Tokumaru, Tokumaru, Tokumaru, Tousey, Verma, Vourlidas, Wang, Wang, Yashiro, Yokoyama, Yokoyama, Young, Zhang   +63 more
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Probing interplanetary scintillation using broadband VLBI

Publications of the Astronomical Society of Australia
Abstract Advancements in VLBI instrumentation, driven by the geodetic community’s goal of achieving positioning accuracy of 1 mm and stability of 0.1 mm/y, have led to the development of new broadband systems. Here, we assess the potential of these new capabilities for space weather monitoring.
Ahmad Jaradat, Guifre Molera Calvés, Jasper Edwards, Simon P. Ellingsen, Tiege McCarthy, John Morgan   +5 more
openaire   +2 more sources

Solar cycle evolution of the solar wind in three dimensions [PDF]

, 1983
Measurements of the solar wind speed both in and out of the ecliptic are presented for 1971-82. The speed estimates, which were made with the interplanetary scintillation system at UC San Diego, have been compared to in situ for large, slowly evolving ...
Coles, W. A., Rickett, B. J.
core   +1 more source

Multifrequency techniques for studying interplanetary scintillations

The Astrophysical Journal, 1975
Rytov's approximation, or the method of smooth perturbations, is utilized to derive the temporal frequency spectra of the amplitude and phase fluctuations of multifrequency plane and spherical waves propagating in the interplanetary medium and solar corona.
openaire   +1 more source

Research in particles and fields [PDF]

Investigations, by particle-detectors flown on spacecraft, of the astrophysical aspects of cosmic radiation and the radiation environment of the earth are reported along with the research of the interplanetary medium, and planetary magnetic fields.
Vogt, R. E.
core   +1 more source