PRELIMINARY RESULTS OF OBSERVATIONS OF THE SOURCES OF SLOWLY VARYING COMPONENT WITH TWO INTERFEROMETERS AT 9400 AND 4000 Mc/s

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An 8-element interferometer for use at 9400 Mc/s has been constructed and regular observations have been made from May, 1959. In this paper comparisons of the results of observations at 9400 Mc/s and those at 4000 Mc/s for 4 selected sources of S component of solar radio emission are described. The results of observations show that the heights of the sources at 9400 Mc/s are between 3000 and 40000 km and, on the average, seem to be about 10^4km lower than those at 4000 Mc/s (11000-50000 km). The flux from the radio source at 3750 Mc/s is nearly equal to one at 9100 Mc/s or larger. Brightness temperature of the strong source is about 10^5K at 9400 Mc/s and about 0.7×10^6K at 3750 Mc/s. It seems that the brightness temperature of two sources specially near 4000 Mc/s is raised by the effect of the magnetic field of sunspots. % polarization of S component from the radio source at 9400 Mc/s is larger than one at 4000 Mc/s. There is a radio source which has an opposite sense of polarization between 9400 and 4000 Mc/s near C.M.

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