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Einstein Gravity Explorer - A Medium-Experimental Astronomy Class Fundametal Physics Mission

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 (2), 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.

Item URL in elib:https://elib.dlr.de/63390/
Document Type:Article
Title:Einstein Gravity Explorer - A Medium-Experimental Astronomy Class Fundametal Physics Mission
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Tino, G.Dipt. di Fisica, LENS Lab., Univ. FirenzeUNSPECIFIED
Gill , P.National Physics Lab. TeddingtonUNSPECIFIED
Salomon, C.Lab. Kastler Brossel, CNRS, ParisUNSPECIFIED
Sterr, U.PTB, BraunschweigUNSPECIFIED
Peik, E.PTB, BraunschweigUNSPECIFIED
Nevsky, A.Inst. f. Experimentalphysik, Heirich-Heine Univ. DüsseldorfUNSPECIFIED
Görlitz, A.Inst. f. Experimentalphysik, Heirich-Heine Univ. DüsseldorfUNSPECIFIED
Svehla, D.Inst. of Astronomical and Physical Geodesy, TU MünchenUNSPECIFIED
Ferrari, G.Dipt. di Fisica, LENS Lab., Univ. FirenzeUNSPECIFIED
Poli, N.Dipt. di Fisica, LENS Lab., Univ. FirenzeUNSPECIFIED
Lusanna, L.INFN, Sez. di FirenzeUNSPECIFIED
Klein, H.National Physics Lab. TeddingtonUNSPECIFIED
Margolis, H.National Physics Lab. TeddingtonUNSPECIFIED
Lemonde, P.LNE-SYRTE, Obs, de ParisUNSPECIFIED
Laurent, P.LNE-SYRTE, Obs, de ParisUNSPECIFIED
Santarelli, G.LNE-SYRTE, Obs, de ParisUNSPECIFIED
Clairon, A.LNE-SYRTE, Obs, de ParisUNSPECIFIED
Ertmer, W.Inst. f. Quantenoptik, Leibniz Univ. HannoverUNSPECIFIED
Rasel, E.Inst. f. Quantenoptik, Leibniz Univ. HannoverUNSPECIFIED
Müller, J.Inst. f. Erdmessung, Leibniz Univ. HannoverUNSPECIFIED
Iorio, L.INFN, Sez. di Pisa, BariUNSPECIFIED
Lämmerzahl, C.ZARM, Univ. BremenUNSPECIFIED
Dittus, H.Inst. f. Raumfahrtsysteme, DLR, BremenUNSPECIFIED
Gill, E.Dept. Earth Observation and Space Systems, TU DelftUNSPECIFIED
Rothacher, M.GeoForschungszentrum, PotsdamUNSPECIFIED
Flechtner, F.GeoForschungszentrum, PotsdamUNSPECIFIED
Schreiber, U.Fundamentalstation Wettzell, Bad KötztingUNSPECIFIED
Flambaum, V.Univ. New South Wales, SydneyUNSPECIFIED
Ni, W.-T.Purple Mountain Obs., NanjingUNSPECIFIED
Liu, L.Shanghai Inst. of Optics and Fine MechanicsUNSPECIFIED
Chen, X.-Z.Inst. of Quantum Electronics, School of Electronics Eng. and Computer Sci., Beijing UNSPECIFIED
Chen, J.-B.Inst. of Quantum Electronics, School of Electronics Eng. and Computer Sci., BeijingUNSPECIFIED
Gao, K.Wuhan Inst. of Physics and Mathematics, Chinese Acad. of Sci.UNSPECIFIED
Cacciapuoti, L.ESA /ESTEC, NoordwijkUNSPECIFIED
Holzwarth, R.Max-Planck-Institut für Quantenoptik, GarchingUNSPECIFIED
Heß, P.Astrium ST, FriedrichshafenUNSPECIFIED
Schäfer, W.TimetECH GmbH, StuttgartUNSPECIFIED
Date:March 2009
Journal or Publication Title:Experimental Astronomy
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In ISI Web of Science:Yes
Page Range:pp. 573-610
EditorsEmailEditor's ORCID iD
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 assignment
DLR - Research area:Space
DLR - Program:W - no assignment
DLR - Research theme (Project):W - no assignment (old)
Location: Bremen
Institutes and Institutions:Institute of Space Systems
Deposited By: Dittus, Prof.Dr. Hansjörg
Deposited On:24 Feb 2010 09:29
Last Modified:06 Sep 2019 15:25

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