Physics
Scientific paper
Dec 2011
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011agufmsh43f..07i&link_type=abstract
American Geophysical Union, Fall Meeting 2011, abstract #SH43F-07
Physics
[2164] Interplanetary Physics / Solar Wind Plasma, [2169] Interplanetary Physics / Solar Wind Sources
Scientific paper
Radio occultation observations of the solar corona were conducted during the solar conjunction of the Japanese Venus explorer AKATSUKI during June 6-July 8 in 2011. The 17 experiments, each of which has a duration of 6-7 hours, covered solar offset distances of 1.5-20.7 solar radii. One-way, X-band downlink signal stabilized by an onboard ultra-stable oscillator was transmitted from the spacecraft and received by an open-loop recording system at the Usuda Deep Space Center. The stable signal source and the high-speed sampling at the ground station allow us to probe fine structures in the solar corona. Analyses of the intensity fluctuation and the frequency fluctuation of the received radio waves provide various parameters such as the amplitude of density fluctuation, the power law of the turbulence, and the velocity of the solar wind and waves. Simultaneous observations with a space solar telescope HINODE were also conducted over 4 days around the period of the minimum solar offset distance.
Ando Hiroki
Asai Ayumi
Futaana Yoshifumi
Imamura Takashi
Isobe Hiroaki
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