ABERRATION OF LIGHT - RELATIVISTIC THEORY AND ITS APPLICATIONS IN COSMIC MICROSECOND ASTROMETRY

Relativistic theory of aberration for an observer moving in the gravit ational field is constructed with the help of monad formalism. A formu la is deduced for the measured angle between the directions to two sou rces. The formula is applied to concrete parameters of the space astro metric mission POINTS, a classification of aberration corrections is p roposed, and their exact numerical estimates are found. It is shown th at the same results are obtained by using a widely different approach based on an hierarchy of relativistic coordinate systems. Practical al gorithm allowing for aberration with microsecond accuracy is discussed .