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Pulsar radio radiation studies using LOFAR network radio telescopes (as part of the Polish POLFAR consortium) and the Giant Metrewave Radio Telescope (India). These studies focus on several aspects of pulsar astrophysics:
1. Analysis of single pulse properties with particular emphasis on phenomena such as subpulse drift, pulsar signal decay (nulling) and radiation mode changes (moding). Studies of this type are a key source of information on the mechanism of pulsar radio radiation and the structure of their magnetospheres.
2. Analysis of the phenomenon of pulsar radio signal scattering in the ionized interstellar medium. This scattering manifests itself as a broadening of the observed pulses dependent on the observation frequency. The nature of the scattering parameters' variability with frequency allows for determining the turbulent properties of the interstellar medium. Since 2018, a project has been carried out to observe the scattering of pulsar signals using Polish LOFAR radio telescopes, which has additionally allowed for studies on the variability of scattering parameters over time, which is important for our understanding of the scale of inhomogeneity and anisotropy of the medium.
3. Studies of interstellar scintillations of pulsar radiation: scintillations are the result of interference of the pulsar signal propagating in different ways through the interstellar medium. This leads to the amplification or extinction of the received signals. The nature of the observed variability and its dependence on frequency, similarly to the case of scattering, is a source of information about the turbulent nature of the interstellar medium.
