Analysis of the calibration quality of the Kyviškės calibration baseline

Abstract

The authors of the paper present analysis of the baseline calibration results that they have performed. The Kyviškės Calibration Baseline (1320 m) is the longest calibration baseline in Lithuania. The baseline was established by the Institute of Geodesy, VGTU in 1996 for calibration of the EDM instruments. The Finnish Geodetic Institute together with the Institute of Geodesy, VGTU is calibrating the Kyviškės Calibration Baseline regularly. The first time these measurements were performed in 1997 and repeated in 2001, 2007, 2008 and 2014. The same Kern Mekometer ME5000 EDM instrument was used for all the measurements performed. By building additional pillar aside from the baseline pillars the Kyviškės Baseline was converted to a triangle-shaped test field in 2000. The results confirm good stability of the baseline, which is now used for calibration of the EDM instruments, total stations and GNSS receivers. The calibration results reveal a slight variation in the baseline length correlated with temperature changes.