L. Petrov

Instrumental errors of geodetic VLBI

                         ABSTRACT

  A model of VLBI observables includes effects of geometry, environment of 
signal propagation and delays in the data acquisition system itself. 
Imperfection of the model of instrumental effects can be a considerable source 
of errors in the estimates of the targeted parameters. Two effects: spurious 
signals in phase calibration and instrumental polarization are considered 
in details. Methods of their detection, evaluation and calibration are 
outlined. Influence of these effects on the final results is shown.