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Gyrophase bunched ions in the plasma sheet
Wang, Zhiqiang; Zhai, Hao; Gao, Zhuxiu +1 more
Gyrophase bunched ions were first detected in the upstream region of the Earth's bow shock in the early 1980s which is formed by the microphysical process associated with reflected solar wind ions at the bow shock. Inside the magnetosphere, the results of computer simulations demonstrated that nonlinear wave-particle interaction can also result in…
Interferometry imaging technique for accurate deep-space probe positioning
Zhang, Juan; Shu, Fengchun; Liu, Lei +2 more
Very long baseline interferometry (VLBI) is a radio astronomy tool with very high spatial resolution. It uses two or more radio telescopes to track the faraway object and gets its visibility. The intensity distribution image of radio source can be obtained by the inverse Fourier transformation of the visibilities sampled on UV plane perpendicular …
Visibility of coronal mass ejections in SOHO/LASCO coronagraphs
Bronarska, K.; Michalek, G.; Yashiro, S. +1 more
We studied the detection efficiency of coronal mass ejections (CMEs) of the Large Angle Spectrometric Coronagraph (LASCO) on board the Solar and Heliospheric Observatory (SOHO). For this purpose LASCO/SOHO observations are compared with these obtained by the two Solar Terrestrial Relations Observatory (STEREO) satellites in quadrature in the perio…
Dust clouds and plasmoids in Saturn's magnetosphere as seen with four Cassini instruments
Khalisi, Emil
We revisit the evidence for a ;dust cloud; observed by the Cassini spacecraft at Saturn in 2006. The data of four instruments are simultaneously compared to interpret the signatures of a coherent swarm of dust that would have remained near the equatorial plane for as long as six weeks. The conspicuous pattern, as seen in the dust counters of the C…
The study of variations of low energy cosmic helium's flux (up to 6 MeV) due to solar activity
Shayan, M.; Davoudifar, P.; Bagheri, Z.
In General, the flux of low energy cosmic rays varies with time due to solar activities. The cosmic particle fluxes were studied using data of satellites near the Earth. In this work, first we studied the variations of particle fluxes from 1 Jan to 31 Dec 2000 and 35 events were selected. Then we proposed a relation for cosmic particle flux as a f…