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2 Reports on Geodesy

2 2006

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Preliminary Central European intraplate velocities from CEGRN campaigns 1994 to 2005

Drescher R., Becker M., Schoenemann E.

Reports on Geodesy

2006

z. 1/76

47-54

Within the Central Europe Regional Geodynamics Project (CERGOP) for the establishment of a high precision reference frame CEGRN (Central European GPS Geodynamic Reference Network) eight GPS campaign solutions since 1994 are available for velocity estimation. They were used to compute preliminary station velocities in the ITRF2000. This paper reports not only on the results and some comparisons with former solutions published by the CERGOP group but also on the improved options available for velocity estimation with version 5.0 of Bernese GPS Software.

A software module for quqlity control of CEGRN sites

Schoenemann E., Becker M., Gutwald J.

Reports on Geodesy

2006

z. 1/76

103-109

GPS observations are still intluenced by a whole amount of effects, as for example multiple reflections, ionosphere etc. which have an impact on the accuracy of the observables even on carefully selected sites. Up to now these effects can not be mitigated or modelled satisfactorily. Hence the monitoring of these station specific effects is mandatory in order to judge about data quality and derive weighting or deletion schemes for optimal parameter estimation. Within the tasks of the work package 4 of the Central Europe Geodynamics Project (CERGOP), a software tool was developed to monitor the continuously operating reference stations of the network. The development was carried out using C++ libraries available for the most common operating systems. Here we describe the basic features of this package and give an overview of its present status.