Consistent Adjustment of Combined Terrestrial and Celestial Reference Frames

  • M. SeitzEmail author
  • P. Steigenberger
  • T. Artz
Conference paper
Part of the International Association of Geodesy Symposia book series (IAG SYMPOSIA, volume 139)


Today, the realization of the International Terrestrial Reference System (ITRS) and the International Celestial Reference System (ICRS) is performed separately. Consequently, the two realizations are not fully consistent and show differences in the network geometry and the realized scale of the terrestrial reference frame (TRF) and in the simultaneously estimated Earth Orientation Parameter (EOP) series. The paper deals with the common adjustment of the Terrestrial Reference Frame (TRF), the Celestial Reference Frame (CRF) and the linking EOP. It presents a computation strategy, which is based on the combination of normal equations. The main focus of the paper is on the impact of a combination of different space geodetic techniques on the CRF, which was not in detail studied so far. The influence of the local tie handling as well as the impact of the EOP combination are studied. The results show, that the combination leads only to small but partly systematic changes of the CRF. The maximum systematic effect is about 0.5 mas for source positions derived in regional networks only.


International Terrestrial Reference Frame International Celestial Reference Frame EOP VLBI SLR GNSS Local ties Combination of normal equations 


  1. Altamimi Z, Collilieux X, Métivier L (2011) ITRF2008: an improved solution of the international terrestrial reference frame. J Geodes 85(8):457–473. doi:10.1007/s00190-011-0444-4CrossRefGoogle Scholar
  2. Feissel-Vernier M, Ma C, Gontier A-M, Barache C (2006) Analysis strategy issues for the maintenance of the ICRF axes. Astron Astrophys 451(3):1107–1112. doi:10.1051/0004-6361:20054581CrossRefGoogle Scholar
  3. Gerstl M, Kelm R, Müller H, Ehrnsperger W (2001) DOGS-CS Kombination und Lösung großer Gleichungssysteme. Interner Bericht, DGFI, MünchenGoogle Scholar
  4. IERS (2009) The second realization of the international celestial reference frame by very long baseline interferometry. In: Fey A, Gordon D, Jacobs C (eds) IERS Tech. Note 35. Presented on behalf of the IERS/IVS Working Group, Verlag des Bundesamtes für Geodäsie und Kartographie, Frankfurt am MainGoogle Scholar
  5. IUGG (2011) IUGG Resolution, Melbourne, Australia.
  6. Nothnagel A (2009) Short note: conventions on thermal expansion modelling of radio telescopes for geodetic and astrometric VLBI. J Geodes 83(9):787–792. doi:10.1007/s00190-008-0284-zCrossRefGoogle Scholar
  7. Rothacher M, Angermann D, Artz T, Bosch W, Drewes H, Böckmann S, Gerstl M, Kelm R, König D, König R, Meisel B, Müller H, Nothnagel A, Panafidina N, Richter B, Rudenko S, Schwegmann W, Seitz M, Steigenberger P, Tesmer V, Thaller D (2011) GGOS-D: homogeneously reprocessing and rigorous combination of space geodetic techniques. J Geodes 85(10):679–705. doi:10.1007/s00190-011-0475-xCrossRefGoogle Scholar
  8. Seitz M, Heinkelmann R, Steigenberger P, Artz T (2011) Common realization of terrestrial and celestial reference frame. In: Alef W, Bernhart S, Nothnagel A (eds) Proceedings of the 20th European VLBI meeting, vol 22. Schriftenreihe des Instituts für Geodäsie und Geoinformation der Universität Bonn, pp 123–127Google Scholar
  9. Seitz M, Angermann D, Bloßfeld M, Drewes H, Gerstl M (2012) The 2008 DGFI realization of ITRS: DTRF2008. J Geodes (online first). doi:10.1007/s00190-012-0567-2Google Scholar

Copyright information

© Springer-Verlag Berlin Heidelberg 2014

Authors and Affiliations

  1. 1.Deutsches Geodätisches ForschungsinstitutMünchenGermany
  2. 2.Institut für Astronomische und Physikalische GeodäsieTechnische Universität MünchenMünchenGermany
  3. 3.Institut für Geodäsie und GeoinformationUniversität BonnBonnGermany

Personalised recommendations