An Accuracy Assessment of Absolute Gravimetric Observations in Fennoscandia

Authors

  • Bjørn Ragnvald Pettersen
  • Mirjam Bilker-Koivula
  • Kristian Breili
  • Andreas Engfeldt
  • Reinhard Falk
  • Olga Gitlein
  • Jon Glenn Omholt Gjevestad
  • W Hoppe
  • Dagny I Lysaker
  • Jaakko Mäkinen
  • Ove Christian Dahl Omang
  • A Reinhold
  • Ludger Timmen

Keywords:

Absolute gravimetry, Fennoscandia

Abstract

We compare a suite of absolute gravimeters used to monitor the temporal changes of gravity at a number of sites in Fennoscandia. Direct comparisons are made from simultaneous observations at selected sites within and outside of the postglacial uplift region. We also compare results at sites visited by two instruments with some separation in time. We conclude from four years of data that gravity differences are obtained within an rms error of ± 3 Gal. The data reveal no systematic biases between the instruments, but occasional shifts from one year to another are noted. We consider that annual instrument comparisons are required to ensure data integrity in a regional observing program that extends over more than a decade.

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Published

2010-10-27

How to Cite

Pettersen, B. R., Bilker-Koivula, M., Breili, K., Engfeldt, A., Falk, R., Gitlein, O., Gjevestad, J. G. O., Hoppe, W., Lysaker, D. I., Mäkinen, J., Omang, O. C. D., Reinhold, A., & Timmen, L. (2010). An Accuracy Assessment of Absolute Gravimetric Observations in Fennoscandia. Nordic Journal of Surveying and Real Estate Research, 7(1). Retrieved from https://journal.fi/njs/article/view/3659

Issue

Vol. 7 No. 1 (2010)

Section

Articles

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Received 2010-10-27
Accepted 2010-10-27
Published 2010-10-27