Plots and reports of the IVS tropospheric parameter rapid combination can be accessed here.
The IVS rapid troposphere combination product is a combination of hourly zenith delay estimates provided by various Analysis Centers (ACs) of the International VLBI Service for Geodesy and Astrometry (http://ivscc.gsfc.nasa.gov/).
IVS Analysis Centers currently participating the IVS tropospheric product
BKG, Bundesamt für Kartographie und Geodäsie, Leipzig, Germany
https://www.bkg.bund.de/DE/Observatorium-Wettzell/Messverfahren/Radiointerferometrie/radiointerferometrie_cont.htmlCGS, Centro di Geodesia Spaziale, Matera, Italy
http://geodaf.mt.asi.it/vlbi_page.htmlIAA, Institute of Applied Astronomy, St. Petersburg, Russia
www.ipa.nw.ru
We want to acknowledge other IVS ACs for their participation in the past:
- CNR, Consiglio Nazionale delle Ricerche, Italy
https://www.cnr.it - DGFI, Deutsches Geodätisches Forschungsinstitut, Munich, Germany
https://www.dgfi.tum.de/en/international-services/ivs-analysis-centre/ - GSFC, NASA Goddard Space Flight Center, Greenbelt, USA
https://lupus.gsfc.nasa.gov/ - IGG, Institute of Geodesy and Geophysics, Vienna, Austria
www.hg.tuwien.ac.at - INA, Istituto di Radioastronomia, Istituto Nazionale di Astrofisica, Bologna, Italy
www.ira.inaf.it/Research/Geodetic.php - MAO, Main Astronomical Observatory, National Academy of Sciences of Ukraine, Kiev, Ukraine
www.mao.kiev.ua - OSO, Onsala Space Observatory, Chalmers University of Technology, Onsala, Sweden
www.oso.chalmers.se
The combined parameters are the zenith total delays (ZTD) of the rapid turnaround sessions IVS-R1 and IVS-R4. Goal of the combination is the identification and exclusion of outliers by comparison and assessment of the precision of current VLBI solutions in terms of tropospheric parameters. The rapid combination is done on a weekly basis four weeks after the release of the observation files on IVS Data Centers. For more information about the IVS tropospheric combination strategy we refer to, please download here (pdf file, 3.5 MB).
References
Heinkelmann R.: IVS Rapid Troposphere Product - A Possible Extension Regarding the IGS TWG (C. Hackman), in: 21st Meeting of the European VLBI Group for Geodesy and Astrometry (EVGA) and 14th IVS Analysis Workshop, Espoo, Finland, 2013.
Heinkelmann R., J. Böhm, S. Bolotin, G. Engelhardt, R. Haas, R. Lanotte, D. S. MacMillan, M. Negusini, E. Skurikhina, O. Titov and H. Schuh: VLBI-derived troposphere parameters during CONT08, J Geod, Vol. 85, doi:10.1007/s00190-011-0459-x, 2011.
Heinkelmann R. and C. Schwatke: The Tropospheric Products of the International VLBI Service for Geodesy and Astrometry, IVS 2010 General Meeting Proceedings, 340–344, 2010.
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