Site surveys at the fundamental geodetic station in Ny-Alesund, Svalbard

摘要

The Space-Geodetic Observatory at Ny-Alesund, Svalbard, was officially opened in 1995 and is operated by the Norwegian Mapping Authority. Over recent years it has developed into a fundamental geodetic station. At such fundamental sites, detailed knowledge of the stability of the station, both locally and with respect to the region, is essential for geodetic and geophysical applications of the observations. The extensive foot-print study for the observatory includes repeated GPS campaigns on a 50 km by 30 km outer control network and repeated also for most of the inner control network extending 400 m by 40 m. Gravity measurements have been carried out for these nets. In addision are also classical surveys carried out for the inner network. The results from the GPS campagins indicate neo-tectonic movements in the vicinity of the observatory.