Phase scintillation observation during coronal sounding experiments with NOZOMI spacecraft

Details Phase scintillation observation during coronal sounding experiments with NOZOMI spacecraft Phase scintillation observation during coronal sounding experiments with NOZOMI spacecraft

Sep 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005a%26a...439.1165i&link_type=abstract

Astronomy and Astrophysics, Volume 439, Issue 3, September I 2005, pp.1165-1169

Astronomy and Astrophysics

Astrophysics

6

Sun: Corona, Sun: Solar Wind, Turbulence

Scientific paper

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.

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