Schiller, S. and Tino, G. and Gill , P. and Salomon, C. and Sterr, U. and Peik, E. and Nevsky, A. and Görlitz, A. and Svehla, D. and Ferrari, G. and Poli, N. and Lusanna, L. and Klein, H. and Margolis, H. and Lemonde, P. and Laurent, P. and Santarelli, G. and Clairon, A. and Ertmer, W. and Rasel, E. and Müller, J. and Iorio, L. and Lämmerzahl, C. and Dittus, H. and Gill, E. and Rothacher, M. and Flechtner, F. and Schreiber, U. and Flambaum, V. and Ni, W.-T. and Liu, L. and Chen, X.-Z. and Chen, J.-B. and Gao, K. and Cacciapuoti, L. and Holzwarth, R. and Heß, P. and Schäfer, W. (2009) Einstein Gravity Explorer - A Medium-Experimental Astronomy Class Fundametal Physics Mission. Experimental Astronomy, 23, pp. 573-610. Springer. DOI: 10.1007/s10686-008-9126-5. ISSN 0922-6435.
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The Einstein Gravity Explorer mission (EGE) is devoted to a precise measurement of the properties of space-time using atomic clocks. It tests one of the most fundamental predictions of Einstein´s Theory of General Relativity, the gravitational redshift, and therby searches for hints of quantum effects in gravity, exploring one of the most important and challenging frontiers in fundamental physics. The promary mission goal is the measurement of the gravitational redshift with an accuracy up to a factor 10^4 higher than the best current results. The mission is based on a satellite carrying cold atom-based clocks. The payload includes a cesium microwave clock (PHARAO), an optical clock, a femtosecond frequency comb, as well as precise microwave time transfer systems between space and ground. The tick rates of the clock are continuously compared with each other, and nearly continuously with clocks on earth, during the course of the 3-year mission. The highly elliptic orbit of the satellite is optimized for the scientific goals, providing a large variation in the gravitational potential between perigee and apogee. Besides the fundamental physics results, as secondary goals EGE will establish a global reference frame for the Earth´s gravitational potential and will allow a new approach to mapping Earth´s gravity field with very high spatial resolution. The mission was proposed as a class-M mission to ESA´s Cosmic Vision Program 2015-2025.
|Title:||Einstein Gravity Explorer - A Medium-Experimental Astronomy Class Fundametal Physics Mission|
|Journal or Publication Title:||Experimental Astronomy|
|In ISI Web of Science:||Yes|
|Page Range:||pp. 573-610|
|Keywords:||Gravitational redshift, Gravitational frequency shift, Atomic clock, Optical clock, Equivalence principle, Local position invariance, Special Relativity, Lorentz Invariance, General Relativity, Geoid, Frequency transfer, Microwave link Gravitational potential|
|HGF - Research field:||Aeronautics, Space and Transport (old)|
|HGF - Program:||Space (old)|
|HGF - Program Themes:||W - no assignement|
|DLR - Research area:||Space|
|DLR - Program:||W - no assignement|
|DLR - Research theme (Project):||W -- no assignement (old)|
|Institutes and Institutions:||Institute of Space Systems|
|Deposited By:||Prof.Dr. Hansjörg Dittus|
|Deposited On:||24 Feb 2010 09:29|
|Last Modified:||04 Apr 2013 16:20|
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