Bremen 2017 – scientific programme
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UP: Fachverband Umweltphysik
UP 8: Symposium Fundamental Physics in Space
UP 8.2: Invited Talk
Wednesday, March 15, 2017, 14:30–15:00, SFG 0140
GRACE/GRACE-FO and LAGEOS/LARES in Geodesy, Earth Observation and Relativity — •Rolf König1, Ignazio Ciufolini2, Frank Flechtner1, and Antonio Paolozzi3 — 1Deutsches GeoForschungsZentrum GFZ, Telegrafenberg, 14473 Potsdam — 2University Salento and Centro Fermi, Italien — 3Sapienza Universita Roma and Centro Fermi, Italien
GRACE, launched in 2002, and its continuation GRACE-FO, to be launched end of 2017, are dedicated missions for the measurement of the time variable gravity field. We will briefly summarize the major achievements of GRACE in Earth observation so far. In 2004 the early GRACE static gravity field models firstly allowed to measure frame-dragging or the Lense-Thirring (LT) effect by Satellite Laser Ranging (SLR) observations to the LAGEOS satellites with an accuracy of 10%. In 2012 the LARES satellite was launched to complement the LAGEOS constellation, goal of the mission is to improve the accuracy of the LT measurement by one order of magnitude. We will briefly summarize the impact of LARES into geodesy before we focus on the relativity aspect. First results on the LT measurements with LARES are published reporting an accuracy of about 5%. We will independently repeat the LT analysis with a longer data span based on a suite of new gravity field models.