Search for sporadic radio-emission from cosmic space at centimeter and decimeter wavelengths

Conclusions

The uniformity of the properties of the radio-emission bursts over a large territory and the dependence of their characteristics on manifestations of solar activity lead to the following conclusions.

• 1. The overwhelming majority of the radio-emission bursts which we observed at decimeter wavelengths and the noise storms are evoked by sporadic radio-emission from the ionomagnetosphere rather than by industrial interferences.

• 2. The bursts of sporadic radio-emission from the ionomagnetosphere and the noise storms are evoked by manifestations of various forms of solar activity (spots, flares, x-rays, etc.).

• 3. Bursts exist in the decimeter and centimeter radio-emission which are global in character and are manifested simultaneously at great distances. The global sporadic radio-emission phenomena occur basically in daytime.

• 4. The existence of simultaneous bursts of radio-emission at points that are spaced at great distances shows that the phenomena of generation may take place either at great altitudes of the order of several thousand kilometers (the altitude of the simultaneous visibility of Gor'kii and Ussuriisk) or at altitudes of tens or hundreds of kilometers at which the generation region encompasses large spaces.

The shape of the coinciding bursts and their detailed structure are not identical; this also is evidence of large scales and large angular dimensions of the region responsible for the radio-emission.

• 5. The global bursts which coincide at several points are evidently associated predominantly with bright chromospheric flares.