Phase scintillation observation during coronal sounding experiments with NOZOMI spacecraft

T. Imamura, K. Noguchi, A. Nabatov, K. I. Oyama, Z. Yamamoto, M. Tokumaru

Research output: Contribution to journalArticlepeer-review

13 Citations (Scopus)

Abstract

Radio occultation observations of the solar corona at solar offset distances of 12.8-36.9 RS were performed from December of 2000 to January of 2001, using the Nozomi spacecraft (Planet-B) of Japan. Phase scintillation spectra up to the frequency of ∼10 Hz were obtained in two-way mode with S-band uplink and X-band downlink. The spectra cannot be represented by a single power law especially for small offset distances. That is, at low frequencies (large scales) the spectra show slopes indicative of Kolmogorov, a local flattening occurs from ∼0.5 Hz (scale ∼600 km) to ∼3 Hz (∼100 km), and a steepening occurs again at higher frequencies. This three-component nature of the spectrum was observed with a single method for the first time, although the spectral shape is variable and the three-component feature is not always evident.

Original languageEnglish
Pages (from-to)1165-1169
Number of pages5
JournalAstronomy and Astrophysics
Volume439
Issue number3
DOIs
Publication statusPublished - 2005 Sep

All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics
  • Space and Planetary Science

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