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The aim of our work was to study the spatial structure of inhomogeneities ofinterstellar plasma in the directions of five pulsars: B0823+26, B0834+06,B1237+25, B1929+10, and B2016+28. Observations of these pulsars were made withRadioAstron space-ground radio interferometer at 324 MHz. We measured theangular size of the scattering disks to be in range between 0.63 and 3.2 mas.We determined the position of scattering screens on the line of sight.Independent estimates of the distances to the screens were made from thecurvature of parabolic arcs revealed in the secondary spectra of four pulsars.The model of uniform distribution of inhomogeneities on the line of sight isnot suitable. According to the results, we came to the conclusion thatscattering is mainly produced by compact plasma layers and the uniform model ofinhomogeneties distribution on the line of sight in not applicable.

Revealing compact structures of interstellar plasma in the Galaxy with RadioAstron