Radio interferometric determination of the spatio-temporal parameters of pulsar radiation

Abstract

One urgent problem in fundamental astrometry is the establishment of a link between the celestial coordinate systems obtained in different wavelength ranges and fixed by different astrophysical objects. We suggest that all spatio-temporal pulsar characteristics should be determined within the framework of a single radio interferometric session, including observations of a pulsar and a quasar: the angular position of the pulsar relative to the quasar (s), the period and phase of the pulsar radiation, and the times of pulse arrival at interferometer receiving stations. The set of such measurement data on many pulsars makes it possible to determine the correlation between the barycentric dynamical coordinate frame and the inertial “quasar” frame, which is also essential for the ephemeral support of space navigation.