Study of scattering material with radioastron-vlbi observations

The RadioAstron spacecraft presents an unique opportunity to measure properties of interstellar scattering. Pulsars offer a variety of observables for study of interstellar scattering. Observations of scattering of nearby pulsars and intra-day variable quasars point to the existence of a component of the interstellar medium (ISM) which has properties quite different from the more distant, diffuse ISM. We observed several nearby pulsars as part of RadioAstron's Early Science Program (ESP). These included pulsars B0950+08, B1919+21 and B0329+54. We present here some results concerning the distribution and properties of scattering material in the direction to these pulsars obtained with cosmic interferometer.