Sökning: "Artu Ellmann"

Hittade 2 avhandlingar innehållade orden Artu Ellmann.

1. 1. Least squares modification of Stokes formula with application to the Estonian geoid

   Författare :Artu Ellmann; KTH; []
   Nyckelord :geoid; stokes formula; least sequares modification; total topographic correction; total atmospheric correction; gps levelling;

   Sammanfattning : Many applications in geodesy,geophysics and engineering require physically defined heightsrelated to an equipotential surface of the Earth, thegeoid.During the last two decades theincreased need for refined geoid models has been driven by thedemands of users of GPS, who nowadays must transformGPS-derived geodetic heights into orthometric heights, makingthem compatible with the local vertical datum. LÄS MER

3. 2. The geoid for the Baltic countries determined by the least squares modification of Stokes´formula

   Författare :Artu Ellmann; KTH; []
   Nyckelord :geoid; Stokes;

   Sammanfattning : Precise knowledge of the geoid contributes to the studies ofthe Earth’s interior, the long-term geophysical processesand to oceanography. An accurate regional geoid model, inparticular, enables the user in many cases to replace thetraditional height determination techniques by faster and morecost-effective GPS-levelling. LÄS MER