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Investigation of sub-daily and episodic variations of Earth rotation

The main objective of the project is to observe high-quality Earth rotation parameter (ERP) series over at least three years with a time resolution of one hour or less derived from various modern geodetic techniques, namely GNSS (GPS+GLONASS), VLBI, and ring laser gyroscopes, and to provide a concise interpretation of these series. The investigations will concentrate on an almost complete modelling of atmospheric and oceanic phenomena, which are the most likely source of short period variations of Earth rotation with periods of few days down to few hours. As a consequence, quasi-periodic, a-periodic, and episodic variations of the ERP should be detectable for the first time. Within each technique the independent analysis of the data by different analysis centers and software packages will provide highest robustness and reliability. Dr. D. Salstein, chairman of the IERS Special Bureau for the Atmosphere, will actively contribute to this project. Within the research unit, the project covers the important sub-daily periods.

Involved institutions:

Scientists / Staff:

  • Prof. Dr. Harald Schuh, Institut für Geodäsie und Geophysik IGG
    Tel.: +43 1 58801 12860, E-Mail: hschuh (at) mars.hg.tuwien.ac.at
  • Prof. Dr. Robert Weber, Institut für Geodäsie und Geophysik IGG
    Tel.: +43 1 58801 12865, E-Mail: rweber (at) mars.hg.tuwien.ac.at
  • Dr. Tobias Nilsson, Institut für Geodäsie und Geophysik IGG
    E-Mail: tobias.nilsson (at) tuwien.ac.at
  • Priv. Doz. Axel Nothnagel, Geodätisches Institut GIUB
    Tel.: +49 228 73 3574, E-Mail: nothnagel (at) uni-bonn.de
  • Sarah Böckmann, Geodätisches Institut GIUB
    Tel.: +49 228 73 2623, E-Mail: boeckmann (at) uni-bonn.de
  • Thomas Artz, Geodätisches Institut GIUB
    Tel.: +49 228 73 3570, E-Mail: thomas.artz (at) uni-bonn.de
  • Prof. Dr. Ulrich Schreiber, Forschungseinrichtung Satellitengeodäsie FESG
    Tel.: +49 9941 603 113, E-Mail: schreiber (at) wettzell.ifag.de
  • Prof. Dr. Markus Rothacher, GeoForschungsZentrum GFZ,
    Tel.: +49 331 288 1100, E-Mail: rothacher (at) gfz-potsdam.de
  • Peter Steigenberger, GeoForschungsZentrum GFZ,
    Tel.: +49 331 288 1133, E-Mail: steigenberger (at) gfz-potsdam.de
  • Natalia Panafidina, ETH Zürich,
    E-Mail: panatali (at) ethz.ch

Former staff:

  • Paulo Jorge Mendes Cerveira, Institut für Geodäsie und Geophysik IGG
    Tel.: +43 1 58801 12863, E-Mail: mendes (at) mars.hg.tuwien.ac.at

Publications:

2011

  • Nilsson, T., J. Boehm, H. Schuh, Impacts of the 2010 Chile Earthquake on Earth rotation. In: Proceedings Journées 2010, Paris, France, in press, 2011
  • Nilsson, T., J. Boehm, H. Schuh, Universal Time from VLBI Single-Baseline Observations During CONT08. Journal of Geodesy, in press, doi: 10.1007/s00190-010-0436-9, 2011

2010

  • Boehm, J., T. Nilsson, H. Schuh, Prospects for UT1 Measurements from VLBI Intensive Sessions. IVS 2010 General Meeting Proceedings, p.251–255, Edited by Dirk Behrend and Karen D. Baver, NASA/CP-2010-215864, 2010
  • Nilsson, T., J. Boehm, H. Schuh, Sub-diurnal Earth Rotation Variations Observed by VLBI. Artificial Satellites, Vol. 45, No. 2, pp. 49-55, doi: 10.2478/v10018-010-0005-8, 2010

2009

  • Mendes Cerveira, P.J., J. Boehm, H. Schuh, T. Kluegel, A. Velikoseltsev, K.U. Schreiber, A. Brzezinski, Earth Rotation Observed by Very Long Baseline Interferometry and Ring Laser. Pure applied geophysics, Vol. 166, No. 6-8, pp. 1499-1517, doi:10.1007/s00024-004-0487-z, 2009
  • Mendes Cerveira, P.J., H. Spicakova, H. Schuh, T. Kluegel, U. Schreiber, A. Velikoseltsev, Earth rotation parameters from Very Long Baseline Interferometry and Ringlaser observables. Advances in Geosciences, Vol.13: Solid Earth. Ed. Kenji Satake (2007), 2009

2008

  • Mendes Cerveira, P.J., S. Englich, H. Schuh, T. Kluegel, A. Velikoseltsev and U. Schreiber, How can the Wettzell "G" ring laser improve VLBI measurements of subdiurnal Earth rotation variations?, In: Proceedings of the Fifth IVS General Meeting 2008, Eds. A. Finkelstein and D. Behrend, ISBN: 978-5-02-025332-2, pp. 19-24, 2008
  • Nothnagel, A., Schnell, D.: The impact of errors in polar motion and nutation on UT1 determinations from VLBI Intensive observations. Journal of Geodesy, accepted Jan. 21, 2008, DOI: 10.1007/s00190-008-0212-2, 2008
  • Artz, T., Böckmann, S., Nothnagel, A., Tesmer, V.: Comparison and Validation of VLBI derived Polar Motion. In: Proceedings of the IVS General Meeting 2008, not published.

2007

  • Artz, T., Böckmann, S., Nothnagel, A., Tesmer, V.: ERP time series with daily and sub-daily resolution determined from CONT05. Geowissenschaftliche Mitteilungen, Schriftenreihe Vermessung und Geoinformation der TU Wien, Heft 79, 69 - 74, 2007.
  • S. Englich, PJ. Mendes Cerveira, R. Weber, H. Schuh: Determination of Earth rotation variations by means of VLBI and GPS and comparison to conventional models. Österreichische Zeitschrift für Vermessung und Geoinformation (VGI), begutachteter Spezialband, Heft 2 (2007), 95. Jahrgang; S. 104 - 112.
    Not barrier-free file. Download (pdf/1614 KB)
  • Mendes Cerveira, P.J., R. Weber, and H. Schuh, (2007): The instantaneous Earth rotation - still inaccessible? Vermessung & Geoinformation 2/2007, pp. 113 – 120. Not barrier-free file. Download (pdf/1114 KB)
  • Mendes Cerveira, P.J., J. Boehm, E. Tanir, J. Wresnik, H. Schuh, and V. Tesmer (2007): Datum Deficiency in VLBI Analysis: Case Study of Session 021020XA. Proceedings of the 18th European VLBI for Geodesy and Astrometry (EVGA) Working Meeting, April 2007, Vienna, Austria. Not barrier-free file. Download (pdf/789 KB)

Poster presentations:

2010

  • T. Nilsson, J. Boehm, H. Schuh, Improving the Estimation of Universal Time from VLBI Intensive Sessions, AGU meeting of the Americas, Foz do Iguazu, Brazil, August 08-12, 2010
  • T. Nilsson, J. Boehm, H. Schuh, Effects of the 2010 Chile Earthquake on geometry and rotation of the Earth, AGU meeting of the Americas, Foz do Iguazu, Brazil, August 08-12, 2010
  • T. Nilsson, J. Boehm, H. Schuh, Single-Baseline VLBI Observations for the Estimation of Universal Time, European Geosciences Union (EGU) 2010, Vienna, Austria, May 02-07, 2010

2008

  • P.J. Mendes Cerveira, H. Schuh, Der Wettzell "G" Ringlaser: Ein Inertialsensor zur Erfassung der instantanen Erdrotation in genäherter Echtzeit, Pangeo 2008, Vienna, Austria, September 22-25, 2008
  • P.J. Mendes Cerveira, S. Englich, H. Spicakova, H. Schuh, The Nearly-Diurnal Free Wobble from Very Long Baseline Interferometry, Earth Tides Symposium, Jena, Germany, September 1-5, 2008
  • P.J. Mendes Cerveira, M. Mueller, J. Boehm, H. Schuh, D. Salstein, Angular momentum and excitation functions during the CONT campaigns, European Geosciences Union (EGU) 2008, Vienna, Austria, April 13-19, 2008
  • D. Thaller, M. Kruegel, V. Tesmer, S. Boeckmann, P. Steigenberger, M. Rothacher, R. Dach: General aspects on generating long time series of Earth orientation parameters. EGU General Assembly 2008, 14-18 April, Vienna.
    Not barrier-free file. Abstract (pdf/8 KB)

2007

  • P.J. Mendes Cerveira, J. Böhm, J. Wresnik, H. Spicakova, and H. Schuh: VLBI-simulations for the estimation of degree-3 Love and Shida numbers h3 and l3. AGU Fall Meeting 2007, San Francisco, USA, Dec. 10-14, 2007.
  • Mendes Cerveira P.J., J. Wresnik, J. Böhm, T. Hobiger, T. Kondo, R. Weber , D. Salstein, and H. Schuh: Semi-hourly polar motion and universal time series from the VLBI CONT02 data set. IUGG 2007, Perugia, Italy, 2-13 July, 2007.
  • Englich S., P.J. Mendes Cerveira, R. Weber, and H. Schuh: Tidal excitation of Earth Rotation observed by GPS and VLBI. IUGG 2007, Perugia, Italy, 2-13 July, 2007.
  • Weber R., S. Englich, and P.J. Mendes Cerveira: ERP-Variations on Time Scales Between Hours and Months Derived from GNSS Observations. AGU Joint Assembly, Acapulco, Mexico, 22-25 May, 2007.
  • Mendes Cerveira P.J., T. Klügel, U. Schreiber, A. Velikoseltsev, B. Meurers, and H. Schuh: VLBI, ring laser and gravity observations for high-frequency polar motion and universal time variations. AGU Joint Assembly, Acapulco, Mexico, 22-25 May, 2007.
  • Mendes Cerveira P.J., R. Heinkelmann, R. Weber, and H. Schuh: Associativity in the datum definition of VLBI analysis and its implication on the terrestrial reference frame. EGU 2007, Vienna, Austria, 15-20 April, 2007.
  • Mendes Cerveira P.J., R. Weber, and H. Schuh: Geometric interpretation of the Earth rotation vector from the non-linearized skew-symmetric tensor. EGU 2007, Vienna, Austria, 15-20 April, 2007.
  • Salstein D., J. Nastula, D. MacMillan, K. Quinn, and P.J. Mendes Cerveira: Excitations of Earth rotation parameters at high frequencies. EGU 2007, Vienna, Austria, 15-20 April, 2007.
  • Mendes Cerveira P.J., E.Tanir, J. Wresnik, J. Böhm, V. Tesmer, and H. Schuh: Datum deficiency in VLBI analysis. 18th EVGA, Vienna, Austria, 12-13 April, 2007.

2006

  • P.J. Mendes Cerveira, S. Englich, J. Böhm, R. Weber, H. Schuh: Virtual Polar Motion and Universal Time Variations in Space Geodetic Techniques due to Atmospheric Pressure Loading. AGU Fall Meeting 2006, San Francisco, USA, Dec. 11-15, 2006.
  • J. Nastula, B. Kolaczek, H. Schuh, R. Weber, J. Böhm, P.J. Mendes Cerveira: Comparison of rapid oscillations of the Earth rotation parameters determined during the CONT02 and the CONT05 Campaigns. GGOS Workshop 2006, Munich, Germany, October 08 - 09, 2006
  • P.J. Mendes Cerveira, J. Böhm, S. Englich, R. Weber, H. Schuh: Optimum Parameterization in Estimating Sub-Daily Earth Rotation Parameters with Very Long Baseline Interferometry. IAU 26th General Assembly, JD16, Prague, Czech Republic, August 14 - 25, 2006

Oral presentations:

2011

  • T. Nilsson, J. Boehm, H. Schuh, Short period EOP variations estimated from VLBI and ring laser observations, Statusseminar DFG Forschergruppe FOR 584 “Erdrotation und globale dynamische Prozesse”, Vienna, Austria, February 24-25, 2011
  • M. Schindelegger, J. Boehm, H. Schuh, Anregung hochfrequenter Erdrotationschwankungen durch atmosphärische Gezeiten,Statusseminar DFG Forschergruppe FOR 584 “Erdrotation und globale dynamische Prozesse”, Vienna, Austria, February 24-25, 2011

2010

  • T. Nilsson, J. Boehm, H. Schuh, Impacts of the 2010 Chile Earthquake on Earth rotation, Journees "Systemes de reference spatio-temporels", Journees "Systemes de reference spatio-temporels" Paris, France, September 20-22, 2010
  • T. Nilsson, High frequency EOP from CONT campaigns, 1st VieVs User Workshop, TU Vienna, Austria, September 07-09, 2010
  • J. Boehm, T. Nilsson, T. Hobiger, H. Schuh, VLBI Intensive sessions for the estimation of UT1, Statusseminar DFG FOR584, Berlin, Germany, March 22-23, 2010
  • T. Nilsson, J. Boehm, H. Schuh, The effect of the Chile Earthquake on February 27, 2010 on the Earth rotation parameters, Statusseminar DFG FOR584, Berlin, Germany, March 22-23, 2010
  • T. Nilsson, J. Boehm, H. Schuh, Universal Time estimated from Single Baseline VLBI Observations during CONT08, Statusseminar DFG FOR584, Berlin, Germany, March 22-23, 2010
  • M. Schindelegger, J. Boehm, H. Schuh, Atmosphärische Drehimpulsfunktionen aus ECMWF-Daten - Berechnungsvarianten im Vergleich, Statusseminar DFG FOR584, Berlin, Germany, March 22-23, 2010
  • J. Boehm, T. Nilsson, H. Schuh, Universal Time from VLBI Single Baseline Observations during CONT08, 6th IVS General Meeting, Hobart, Tasmania, Australia, February 7-10, 2010

2009

  • T. Nilsson, H. Schuh, J. Boehm, S. Boehm, M. Schindelegger, A. Pany, L. Plank, H. Spicakova, K. Teke, J. Wresnik, Investigation of high frequency EOP variations, Statusseminar DFG FOR584, Munich, Germany, October 29-30, 2009
  • T. Nilsson H. Schuh J. Boehm S. Boehm A. Pany, L. Plank H. Spicakova K. Teke J. Wresnik, Sub-diurnal Earth Rotation Variations Observed by VLBI, IERS Workshop on EOP Combination and Prediction, Warsaw, Poland, October 19-21, 2009

2008

  • P.J. Mendes Cerveira, S. Englich, H. Spicakova, The "G" Wettzell Ring Laser as a North-South Tilt Probe, Earth Tides Symposium (ETS), Jena, Germany, September 1-5, 2008
  • P.J. Mendes Cerveira, H. Schuh, L. Plank, R. Haas, U. Schreiber, T. Kluegel, A. Velikoseltsev, A. Brzezinski, The apparent diurnal motion of the instantaneous rotation axis from VLBI and the Wettzell "G" ring laser, European Geosciences Union (EGU) 2008, Vienna, Austria, April 13-19, 2008
  • P. Steigenberger, V. Tesmer, D. MacMillan, D. Thaller, M. Rothacher, M. Fritsche, A. Rülke and R. Dietrich: Subdaily Earth rotation observed by GPS and VLBI. EGU General Assembly 2008, 14-18 April, Vienna. Not barrier-free file. Abstract (pdf/7 KB)
  • P. Mendes: Short Period and Episodic Earth Rotation Determination. Statusseminar DFG Forschergruppe FOR 584 “Erdrotation und globale dynamische Prozesse”, Wettzell, 12. – 14.03.2008.
  • L. Plank: Direkte Ableitung des momentanen Erdrotationsvektors aus VLBI-Daten. Statusseminar DFG Forschergruppe FOR 584 “Erdrotation und globale dynamische Prozesse”, Wettzell, 12. – 14.03.2008.
  • P. Steigenberger: Comparison and combination of subdaily ERPs determined by GPS and VLBI. Statusseminar DFG Forschergruppe FOR 584 “Erdrotation und globale dynamische Prozesse”, Wettzell, 12. – 14.03.2008.
  • Mendes Cerveira P.J., H. Schuh, T. Klügel, A. Velikoseltsev, and U. Schreiber: How can the Wettzell "G" ring laser improve VLBI measurements of subdiurnal Earth rotation variations? IVS General Meeting 2008, St. Petersbourg, Russia, 3.-7.03.2008.
  • Mendes Cerveira P.J., and H. Schuh: Equatorial Earth rotation from hours to days from VLBI and ring laser. Space Research Centre at Polish Academy of Sciences, 2008, Warsaw, Poland, 31.01.-03.02.2008.

2007

  • Böhm J., P.J. Mendes Cerveira, and H. Schuh: High-resolution atmosphere angular momentum time series from the ECMWF. AGU Fall Meeting 2007, San Francisco, USA, 10.-14.12.2007.
  • P. Steigenberger, V. Tesmer, D. MacMillan, D. Thaller, M. Rothacher, M. Fritsche, A. Rülke and R. Dietrich: Subdaily Earth Rotation Models Estimated From GPS and VLBI Data. Oral presentation, Eos Trans. AGU, 88(52), Fall Meet. Suppl. 2007.
  • Mendes Cerveira P.J., and H. Schuh: Geodetic vs. geophysical Earth rotation. 94th Journées Luxembourgeoises de Géodynamique JLG94, 2007, Gonderange, Luxembourg, 12-14 November, 2007.
  • Salstein D.A., J. Nastula , K. Quinn, D. Macmillan, and P.J. Mendes Cerveira: Atmospheric excitation of Earth rotation/polar motion at high temporal resolution. Journées "Systèmes de référence spatio-temporels" 2007, Paris, France, 17-19 September, 2007.
  • Mendes Cerveira P.J., H. Schuh, T. Artz, A. Nothnagel, T. Klügel, U. Schreiber, and A. Velikoseltsev: Finest Structures of Earth Rotation Parameters From VLBI and Ring Laser Observations. AOGS 2007, Bangkok, Thailand, 30 July - 04 August, 2007.
  • Mendes Cerveira P.J., T. Klügel, U. Schreiber, A. Velikoseltsev, B. Meurers, and H. Schuh: Earth rotation parameters from combined VLBI, ring laser and gravity observations. IUGG 2007, Perugia, Italy, 2-13 July, 2007.
  • Boehm J., P.J. Mendes Cerveira, S. Englich, R. Weber, and H. Schuh: Atmosphere angular momentum time series in the light of GGOS. IUGG 2007, Perugia, Italy, 2-13 July, 2007.
  • H. Schuh: The intricacies of high-frequency polar motion and universal time variations: status report of the SPEED project. Statusseminar DFG Forschergruppe FOR 584 “Erdrotation und globale dynamische Prozesse”, Dresden, 30. – 31.05.2007.
  • P. Mendes: The potential of integrating ring laser data into VLBI observations for sub-daily Earth rotation parameters. Statusseminar DFG Forschergruppe FOR 584 “Erdrotation und globale dynamische Prozesse”, Dresden, 30. – 31.05.2007.
  • P. Steigenberger: GPS-derived long time series of sub-daily Earth rotation parameters. Statusseminar DFG Forschergruppe FOR 584 “Erdrotation und globale dynamische Prozesse”, Dresden, 30. – 31.05.2007.
  • Schuh H., T. Artz, A. Nothnagel, and P.J. Mendes Cerveira: Short-period variations of the Earth rotation parameters observed by Very Long Baseline Interferometry. AGU Joint Assembly, Acapulco, Mexico, 22-25 May, 2007.
  • Englich S., P.J. Mendes Cerveira, R. Weber, and H. Schuh: Tidal variations in LOD and UT1 observed with GPS and VLBI - Impact of different processing strategies. EGU 2007, Vienna, Austria, 15-20 April, 2007.
  • Mendes Cerveira P.J., and H. Schuh: Use of Earth rotation variations and relative angular momentum fields to constrain the structure and dynamical processes of the Earth. 2nd Workshop on "Deformation and Gravity Change: Indicators of Isostasy, Tectonics, Volcanism and Climate Change", Lanzarote, Spain, 27-30 March, 2007.

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Modification date: 8 Mar 2011