Measurement of vertical crustal motion in Europe by VLBI Station report for Ny- ˚Alesund Norwegian Mapping Authority

• Main Authors: Hans-peter Plag, N- Hønefoss
• Other Authors: The Pennsylvania State University CiteSeerX Archives
• Format: Text
• Language: English
• Subjects: Arctic
• Online Access: http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.138.1228; http://geodesy.unr.edu/hanspeterplag/publications/pubs/plag_ivs1.pdf

The Norwegian Mapping Authority (NMA) participates in the project ”Measurement of vertical crustal motion in Europe by VLBI ” with the space-geodetic observatory at Ny- ˚Alesund. This observatory is a multi-parameter monitoring site contributing to global geodetic networks. Due to its remote location in the Arctic, the station constitutes a unique cornerstone for these networks. The environmental parameters recorded at the station include sea level, surface deformations and gravity. Meteorological observations including daily radio-sondes are available for the nearby research station of the Alfred-Wegener-Institute. In the project, NMA contributes to several of the tasks defined in the project workplan. For each task, the status is reported. Up to now, progress has been close to the workplan with some additional contributions reported here. The comparison of horizontal station velocities to those predicted by the NUVEL-1A model for the Eurasian plate shows a good agreement. Comparison between GPS and VLBI results for station velocities results in significant disagreement for vertical velocities, the reason of which remains to be clarified.