EISCAT has been used to make three types of measurement of the characteristics of the solar wind in the range 10–120 solar radii. The rms fluctuation in the total power received from a single source can be measured to provide a `scintillation index'. The cross-correlation of the scintillations observed at two sites can be used to measure the velocity of the solar wind, indicating at the same time whether one or more velocity streams control the correlation. The rate at which the correlation coefficient drops as the transverse separation of the two beams increases gives an indication of the transverse scales of the irregularities. Examples are given of all three types of measurement made during campaign periods between 1990 and 1993.
ASJC Scopus subject areas
- Environmental Science(all)
- Atmospheric Science
- Earth and Planetary Sciences(all)