Looking for systematic error in scale from terrestrial reference frames derived from DORIS data
The long-term stability of the scale of Terrestrial Reference Frames is directly linked with station height determination and is critical for several scientific studies, such as global mean sea level rise or ocean circulation with consequences to global warming studies. In recent International Terrestrial Reference Frame (ITRF) solutions, the DORIS technique was not considered able to provide any useful information on scale (derived from VLBI and SLR). We have analyzed three different DORIS time series of coordinates (GSFC, IGN/JPL, LEGOS/CLS) performed independently using different software packages. In the long-term, we show that the DORIS technique, due to its very stable and geographically distributed network, has extremely good stability (<0.1 ppb/yr). In the short-term, the three groups show systematic errors in scale (up to 5 ppb) that could come from their specific analysis strategies. Furthermore, we have investigated on a shorter time period (2004) new results for single-satellite solutions. This analysis is a first step in understanding the systematic errors currently seen in the DORIS-derived scale from different groups.
KeywordsDORIS Terrestrial Reference Frame (TRF) orbit determination
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- Chao B.F., and A. Au (1991), Temporal variation of the Earth’s low-degree field caused by atmospheric mass redistribution — 1980–1988, Journal of Geophysical Research, Solid Earth, Vol. 96(B4), pp. 6569–6575.Google Scholar
- Feissel-Vernier M, J.J. Valette, K. Le Bail, L. Soudarin (2005). Impact of the GRACE gravity fields models on IDS products, International DORIS Service Report.Google Scholar
- Gerasimenko M.D., A.G. Kolomiete, M. Kasahara, J.F. Crétaux, L. Soudarin (2005). Establishment of the three-dimensional kinematic reference frame by VLBI and DORIS global data, Far Eastern Mathematical Journal.Google Scholar
- Lemoine F.G., et al. (1998). The development of the joint NASA/GSFC and the National Imagery and mapping Agency (NIMA) geopotential models, EGM96, in NASA, TP-1998-206861, pp. 1–575.Google Scholar
- Lemoine J.-M., H. Capdeville (submitted). Correction model for the SAA effect on Jason/DORIS data. Journal of Geodesy Google Scholar
- Rummel R., H. Drewes, G. Beutler (2002). Integrated Global Observing System IGGOS, A candidate IAG Project, In Proc. International Association of Geodesy, Vol. 125, pp. 135–143.Google Scholar
- Webb F., and J. Zumberge (Eds.) (1995). An introduction to Gipsy/Oasis II, Report Jet Propulsion Laboratory, Pasadena, USA, JPLM D-11088.Google Scholar