IAG-IASPEI 2017

Presentation information

Oral

IAG Symposia » G01. Reference frames

[G01-6] Regional reference frames and networks II

Thu. Aug 3, 2017 10:30 AM - 12:00 PM Room 502 (Kobe International Conference Center 5F, Room 502)

Chairs: Johannes Böhm (Technische Universität Wien) , Zuheir Altamimi (Institut National de l'Information Géographique et Forestière)

10:45 AM - 11:00 AM

[G01-6-02] ITRF2014/IGS14 European Regional Densification Using the EPN Long Term Daily SINEX product

Ambrus Kenyeres1, Tomasz Liwosz2, Juliette Legrand3, Christof Voelksen4, Andrzej Araszkiewicz5, Jan Dousa6, Daniel Ineichen7, Elmar Brockman7, Marcellino Valdes8 (1.BFKH FTFF Satellite Geodetic Observatory, Budapest, Hungary, 2.Politechnika Warszawska, Warsaw, Poland, 3.Royal Observatory of Belgium, Brussels, Belgium, 4.KEG BAdW, Munich, Germany, 5.MUT, Warsaw, Poland, 6.GOP, Pecny, Czech Republic, 7.SWISSTOPO, Wabern, Switzerland, 8.IGN, Madrid, Spain)

The successive realizations of the International Terrestrial Reference System are based on the analysis of space geodetic data series stemming from GNSS, SLR, VLBI and DORIS. Beyond the modeling refinements the realizations (called ITRFyy, where yy denotes the end date of data involved in the solution) includes growing data sets, therefore a gradual quality improvement of the consecutive solutions is expected.
On regional scale the geodetic reference frame realizations are maintained by densification of the global ITRS realizations using continental scale CORS networks. Such networks are operational in Europe (EPN), North-America (NAREF), South-America (SIRGAS), Africa (AFREF), Asia-Pacific (APREF).
In contrary to the present EPN practice, where weekly SINEX solutions are used, the European densification of IGS14 is being prepared based on the cumulative solution of the daily SINEX product series stemming from the EPN REPRO2 activity and the routine EPN data processing being done at 17 Analysis Centres.
As the cumulative solution is updated at each 15 weeks the agreement between the initial global frame solution and its regional densification series may vary in time as a consequence of new data added, due to changes in network geometry or in intermediate changes in modeling parameters.
In this paper the regional ITRFyy densification methodology is described and the European ITRF2014/IGS14 densification solution is introduced with special emphasis on testing the agreement level of the former IGb08 densification series and the IGS14 solution.