Piecewise linear offsets for VLBI parameter estimation

K. Teke1,2, J. Boehm1, E. Tanir3, H. Schuh1

1Institute of Geodesy and Geophysics, Vienna University of Technology, Austria
2Dept. of Geodesy and Photogrammetry Engineering, Hacettepe University, Turkey
3Dept. of Geodesy and Photogrammetry Engineering, Karadeniz Technical University, Turkey

Poster presentation

In the scope towards developing a new software package for the analysis of Very Long Baseline Interferometry observations (Vienna VLBI Software, VieVS), all parameters to be estimated are basically modelled with piecewise linear offsets at integer hours, or at integer fractions or integer multiples of integer hours. In this presentation, we compare troposphere, clock, and Earth orientation parameters and their formal errors using various time intervals (from 10 minutes to 24 hours) depending on the conditions and constraints on the piecewise linear offsets. Furthermore, we investigate the effect of the choice of the reference clock station on the estimated parameters. The influence on the correlations between the troposphere parameters and the estimated station coordinates are also investigated and we explore the possibility to apply a ’no-net-translation’ condition on the clock parameters instead of fixing the clock of the reference station. Continuous VLBI campaigns (CONT02, CONT05) are taken for the investigation.