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CHALMERS Institute’s report 2004-2005

CHALMERS Institute’s report 2004-2005. Space Geodesy group Department for Radio and Space Science. Content. VLBI / CONT02: Sub-diurnal Earth rotation variations VLBI / CONT02: Atmospheric Gradients VLBI: Modeling of thermal deformation of radio telescopes VLBI CONT05 campaign

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CHALMERS Institute’s report 2004-2005

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  1. CHALMERSInstitute’s report2004-2005 Space Geodesy group Department for Radio and Space Science Chalmers / Radio and Space / Space Geodesy

  2. Content • VLBI / CONT02: Sub-diurnal Earth rotation variations • VLBI / CONT02: Atmospheric Gradients • VLBI: Modeling of thermal deformation of radio telescopes • VLBI CONT05 campaign • Analysis of European geodetic VLBI data • BIFROST / Crustal motion in Fennoscandia • Ocean tide and Air pressure loading • Contribution to the IVS TROP Project • GPS estimation errors: spatial and temporal correlation structure • GPS meteorology in the tropical climate • Ground-based GPS data applied to weather forecasting (COST 716) • Ground-based GPS water vapor tomography • GPS System Research Chalmers / Radio and Space / Space Geodesy

  3. Sub-diurnal Earth rotation variations VLBI CONT02: Analyse residual PM/UT1 with respect to Ray et al. (1994) IERS model. In subdiurnal band ~ 50% (20%) of total signal. Use Wavelets. Find spectral power near S3, probably atmospheric origin. Results in Haas et al. (2004) Chalmers / Radio and Space / Space Geodesy

  4. Atmospheric Loading Predicted effects and regression coefficients with respect to loacal pressure time series Application: SLR Report: Bock, Noomen and Scherneck, 2005 Chalmers / Radio and Space / Space Geodesy

  5. Ocean Tide Loading The automatic loading provider http://www.oso.chalmers.se/~loading News: Using additionally 2 recent ocean tide models TPXO 7.0 (Oregon State University) FES2004 (CNES Toulouse, Letellier 2005) Remember: 11 coefficients M2 S2 N2 K2 K1 O1 P1 Q1 Mf Mm Ssa 3+1 components (R, E, N, g) Chalmers / Radio and Space / Space Geodesy

  6. Let: New solution - Right: New solution minus model Chalmers / Radio and Space / Space Geodesy

  7. submitted to J. Geodesy: Chalmers / Radio and Space / Space Geodesy

  8. COST 716 Map: GPS stations in Europe contributing near-real time = Processed at NKG-S/Onsala Sweden: colaboration with SMHI and National Land Survey Final report published (Elgered et al., 2005) This year transferring processing to SMHI Chalmers / Radio and Space / Space Geodesy

  9. GPS estimation errors: TOUGH • TOUGH-Project (Targeting Optimal Use of GPS Humidity Measurements in Meteorology) is supported by the 5th Framework Programme of the European Commission. • GPS estimation errors: spatial and temporal correlation structure • http://dmiweb.dmi.dk/pub/tough/deliverables/d19-report.pdf (Stoew and Elgered) Temporal correlation GPS-WVR Chalmers / Radio and Space / Space Geodesy

  10. Troposphere tomography 9:00 UT 13:00 UT Simulation GPS / GPS+GALILIEO Chalmers / Radio and Space / Space Geodesy

  11. Publications 2005 • Askne, J., G. Elgered, B. Galle, D. Murtagh, G. Smith-Jonforsen, and L.M.H. UlanderRemote sensing at the department of Radio and Space Science, Chalmers University of Technology, IEEE Geosci. Rem. Sens. Soc. Newsletter, pp.11-18, September 2005. • Bergstrand, S., H.-G. Scherneck, G.A. Milne, J.M. JohanssonUpper mantle viscosity from continuous GPS baselines in Fennoscandia,J. Geodynamics,39, 91-109, 2005. • Bergstrand, S., R. Emardson, P.O. Jarlemark and J.M. JohanssonIonospheric Corrections for Accurate Positioning in Real Time, in Proc. Radio Science and Communication (RVK)eds. O. Gustafsson and P. Löwenborg, pp. 391--394. Linköping, Sweden, June 14-16, 2005. • Bergstrand, S., H.-G. Scherneck, M. Lidberg and J.M. JohanssonBIFROST: A Comparison of Noise Properties in Various GPS Solutions, submitted to J. of Geodesy  /  IAG/IAPSO/IABO Joint Assembly Proceedings, Cairns 2005. Chalmers / Radio and Space / Space Geodesy

  12. Bock, D., R. Noomen, H.-G. ScherneckAtmospheric pressure loading displacement of SLR stationsJ. Geodynamics,39, 247-266, 2005. • Elgered, G., H.-P. Plag, H. van der Marel, S. Barlag, and J. Nash (eds.)COST 716: Exploitation of Ground-Based GPS for Climate and Numerical Weather Prediction Applications, Final Report, European Community, EUR 21639,  2005. • Granström, C., and J.M. JohanssonThe influence of vegetation and multipath on GNSS signals, in Proc. Radio Science and Communication (RVK),Linköping, Sweden, June 14--16, 2005, eds. O. Gustafsson and P. Löwenborg, pp. 385-390, 2005. Chalmers / Radio and Space / Space Geodesy

  13. Haas, R., Wünsch, J.Sub-diurnal Earth rotation variations from the VLBI CONT02 campaign. J. of Geodynamics, in press, 2005. • Haas, R., and G. ElgeredThe IVS Network Station Onsala Space Observatoryin: International VLBI Service for Geodesy and Astrometry 2004 Annual Report, NASA/TP-2005-212772, eds. D. Behrend and K. D. Baver, pp.  93-96, 2005. • Haas, R., Granström, C., Johansson, J.An Investigation of Water Vapor Trends in Europe. In: Proc. of the 17'th Working Meeting on European VLBI for Geodesy and Astrometry, 91-96, 2005. • Haas, R., and H.-G. ScherneckThe IVS Analysis Center at the Onsala Space Observatoryin: International VLBI Service for Geodesy and Astrometry 2004 Annual Report, NASA/TP-2005-212772, eds. D. Behrend and K. D. Baver, pp. 239-242, 2005. • Nilsson, T., and G. ElgeredThe IVS Technology Development Center at the Onsala Space Observatoryin: International VLBI Service for Geodesy and Astrometry 2004 Annual Report, NASA/TP-2005-212772, eds. D. Behrend and K. D. Baver, pp. 276-279, 2005. Chalmers / Radio and Space / Space Geodesy

  14. Nilsson, T., L. Gradinarsky and G. ElgeredCorrelations between slant wet delays measured by microwave radiometry", IEEE Trans. Geosci. Rem. Sens., GE-43(5), 1028-1035, 2005. • Nilsson, T., Assessment of Tomographic Methods for Estimation of  Atmospheric Water Vapor Using Ground-Based GPS, Technical Report No. 6L, Licentiate Thesis, Department of Radio and Space Science, Chalmers University of Technology, Göteborg, 2005. • Nilsson, T., L. Gradinarsky, and G. ElgeredEstimating the 3D Structure of the Atmospheric Water Vapor using GPS Phase Observations, in Proc. Radio Science and Communication (RVK), Eds. O. Gustafsson and P. Löwenborg, pp. ?--?. Linköping, Sweden, June 14-16, 2005. • Nothnagel, A., Cho, J., Roy, A., Haas, R.WVR calibrations applied to European VLBI observing sessions. submitted to Journal of Geodesy /  IAG/IAPSO/IABO Joint Assembly Proceedings,  Cairns 2005. Chalmers / Radio and Space / Space Geodesy

  15. Schuh, H., Boehm, J., Engelhardt, G., MacMillan, D., Lanotte, R., Tomasi, P., Negusini, M., Vereshchaguina, I., Gubanov, V., Haas, R.Determination of tropospheric parameters within the new IVS Pilot Project. In: F. Sansò (ed.) A Window on the Future of Geodesy, International Association of Geodesy Symposia, Vol. 128, 125-130,  Springer Verlag,  2005. • Snajdrova, K., Boehm, J., Willis, P., Haas, R., Schuh, H.Multi-technique comparison of tropospheric zenith delays derived during the CONT02 campaign. J. of Geodesy, in press, 2005. • Stoew, B., T. Nilsson, P. Jarlemark, and G. ElgeredTemporal correlations of atmospheric mapping function errors in GPS data analysis, submitted to  J. of Geodesy, 2005. Wresnik, J., Haas, R., Boehm, J., Schuh, H.Thermal deformation of VLBI antennas. In: Proc. of the 17'th Working Meeting on European VLBI for Geodesy and Astrometry, 45-51, 2005. Chalmers / Radio and Space / Space Geodesy

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