On the determination of the Danish height system DVR90 and the impact of gravitational and tidal corrections applied

摘要

The DVR90 is the first one of the coming new national height systems of the Nordic countries. It is a non-tidal Helmert height system practically referring the mean crust to the mean sea level in Danish waters. The article is focusing on some general aspects related to the determination of a non-tidal height system. Preceding an overview on the most common gravitational and tidal corrections in leveling the astronomical correction is treated more thoroughly. A brief presentation of the Danish third precise leveling is followed by a detailed description of the computation of the DVR90. Finally, the impact of the corrections applied is indicated and numerical values are given.