Abstract
Local ties (LTs) at co-located sites are currently used to align different space geodetic techniques for the determination of a global terrestrial reference frame (TRF). However, the currently available LT measurements are typically characterized by an inhomogeneous accuracy, which may cause inconsistencies within the TRF and limit the final TRF accuracy. An alternative strategy is a combination of common parameter types to which the individual geodetic techniques are sensitive. In this study, we combine Global Navigation Satellite Systems (GNSS) and Satellite Laser Ranging (SLR) data without using LTs but by combining the common pole coordinates and by adding proper datum constraints. In addition, we constrain the velocities at co-located sites to be the same for all markers. This allows an independent validation of measured LT components. Our data are based on a homogeneous reprocessing of GPS+GLONASS and SLR to LAGEOS-1 and LAGEOS-2 over 17 years in the time span of 1994–2010. A preliminary analysis including the elimination of outliers and the selection of core datum stations was performed based on the station position time series of the single-technique solutions. Applying our combination approach, the north and height components of the LTs can be directly derived from our combined coordinate solution. The differences of the measured and the estimated LTs remain below 1 cm for 96% in the north component and for 50% in the height component of all co-located sites.
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Notes
- 1.
- 2.
http://itrf.ensg.ign.fr/local_surveys.php → “Local Ties used in ITRF2008” → “Local ties SINEX files”.
- 3.
http://itrf.ensg.ign.fr/ITRF_solutions/2008/ITRF2008.php → “ITRF2008 tie and space geodesy discrepancies”.
References
Altamimi Z, Collilieux X, Métivier L (2011) ITRF2008: an improved solution of the international terrestrial reference frame. J Geodesy 85(8):457–473. DOI 10.1007/s00190-011-0444-4
Bizouard C, Gambis D (2011) The combined solution C04 for Earth orientation parameters consistent with international terrestrial reference frame 2008. http://hpiers.obspm.fr/iers/eop/eopc04/C04.guide.pdf
Dach R, Hugentobler U, Fridez P, Meindl M (eds) (2007) Bernese GPS software version 5.0. Astronomical Institute, University of Bern, Bern
Fritsche M, Sośnica K, Rodríguez-Solano C, Steigenberger P, Wang K, Dietrich R, Dach R, Hugentobler U, Rothacher M (2014) Homogeneous reprocessing of GPS, GLONASS and SLR observations. J Geodesy 88(7):625–642. DOI 10.1007/s00190-014-0710-3
Glaser S, Fritsche M, Sośnica K, Dach R, Rodríguez-Solano CJ, Hugentobler U, Wang K, Rothacher M, Dietrich R (2015) A consistent combination of GNSS and SLR with minimum constraints. J Geodesy. DOI 10.1007/s00190-015-0842-0
Krügel M, Angermann D (2005) Analysis of local ties from multi-year solutions of different techniques. In: Proceedings of the IERS workshop on site co-locations, Verlag des Bundesamtes fr Karthographie und Geodäsie, Frankfurt am Main, IERS Technical Note No. 33
Ostini L (2012) Analysis and quality assessment of GNSS-derived parameter time series. Ph.D. thesis, Philosophisch–naturwissenschaftliche Fakultät der Universität Bern
Ray J, Altamimi Z (2005) Evaluation of co-location ties relating the VLBI and GPS reference frames. J Geodesy 79(4–5):189–195. DOI 10.1007/ s00190-005-0456-z
Sarti P, Sillard P, Vittuari L (2004) Surveying co-located space-geodetic instruments for ITRF computation. J Geodesy 78(3):210–222. DOI 10. 1007/s00190-004-0387-0
Seitz M, Angermann D, Bloßfeld M, Drewes H, Gerstl M (2012) The 2008 DGFI realization of the ITRS: DTRF2008. J Geodesy 86(12):1097–1123. DOI 10.1007/s00190-012-0567-2
Thaller D, Krügel M, Rothacher M, Tesmer V, Schmid R, Angermann D (2007) Combined Earth orientation parameters based on homogeneous and continuous VLBI and GPS data. J Geodesy 81(6–8):529–541. DOI 10. 1007/s00190-006-0115-z
Thaller D, Dach R, Seitz M, Beutler G, Mareyen M, Richter B (2011) Combination of GNSS and SLR observations using satellite co-locations. J Geodesy 85(5):257–272. DOI 10.1007/s00190-010-0433-z
Thaller D, Roggenbuck O, Sośnica K, Mareyen M, Dach R, Jäggi A (2013) Validation of GNSS-SLR local ties by using space ties. In: IERS workshop on local surveys and co-locations, Paris
Acknowledgements
We would like to thank the German Research Foundation and the Swiss National Science Foundation for the financial support within the project “Geodätische und geodynamische Nutzung reprozessierter GPS-, GLONASS- und SLR-Daten”. We are very grateful to three anonymous reviewers for their valuable comments which helped to improve the manuscript.
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Glaser, S. et al. (2015). Validation of Components of Local Ties. In: van Dam, T. (eds) REFAG 2014. International Association of Geodesy Symposia, vol 146. Springer, Cham. https://doi.org/10.1007/1345_2015_190
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DOI: https://doi.org/10.1007/1345_2015_190
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