Reliability Measures for Geodetic VLBI Products

摘要

The reliability of geodetic VLBI products depends essentially on the checkability of the observation data and the reference frame points. In statistics, reliability has two meanings. The first one deals with the detectability of incomplete or incorrect parts of the model by means of statistical hypothesis tests (internal reliability). The second one studies the impact of non-detectable model errors on the estimated parameters (external reliability). In this paper the theoretical background of reliability is shortly reviewed. The focus lies on its application to the estimation procedure with respect to possible errors in the reference frame. The potential influence of non-detectable errors in the station and source coordinates on VLBI products is presented and discussed based on the data from the CONT02 campaign.