Browsing by Author "Kairus, Antti"

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    GPS-meteorologia
    (2009) Kairus, Antti; Vermeer, Martin; Insinööritieteiden ja arkkitehtuurin tiedekunta; Ahonen-Rainio, Paula
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    Using the Nordic Geodetic Observing System for land upfit studies
    (2012) Kairus, Antti; Poutanen, Markku; Nordman, Maaria; Maankäyttötieteiden laitos; Insinööritieteiden korkeakoulu; School of Engineering; Vermeer, Martin
    During the last decade, geodesists have developed regional and global observing systems. In Nordic countries the proposed observing system, called NGOS (Nordic Geodetic Observing System) is organized by the NKG (Nordiska Kommissionen för Geodesi, Nordic Geodetic Commission). An observing system consists of geodetic stations with several observing techniques at the same site, databases, and combination of different observing techniques. The Nordic Geodetic Observing system includes stations in addition to the Nordic countries from the Baltic States and on Iceland and Greenland. This paper explains how to create a database for this observing system. The aim is to create a database, allowing access to the network stations. Purpose of this is to facilitate data availability by collecting public information from Internet and other open sources in the same database and provide the links to the users. The second part of this thesis deals with how this kind of database can be used in different geodetic studies; in this case particularly to the land uplift studies. In the analysis Finnish, Swedish and Norwegian coastal geodetic stations are studied, and uplift values obtained by different techniques are collected. As a result land uplift values from three techniques, GNSS, tide gauges and absolute gravimeter are compared to the NKG2005LU land uplift model. The purpose is to evaluate the results from different techniques and different sources and get the most reliable values for the uplift. The best results stem from techniques continuously measuring CGNSS and tide gauges. The techniques are difficult to compare because they measure different things. However, all observing techniques are useful, and when used parallel give the most reliable information on land uplift.