Reply to “A comment on “A test of general relativity using the LARES and LAGEOS satellites and a GRACE Earth gravity model, by I. Ciufolini et al.””

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dc.contributor.authorCiufolini, Ignazio
dc.contributor.authorPavlis, Erricos C.
dc.contributor.authorRies, John
dc.contributor.authorMatzner, Richard
dc.contributor.authorKoenig, Rolf
dc.contributor.authorPaolozzi, Antonio
dc.contributor.authorSindoni, Giampiero
dc.contributor.authorGurzadyan, Vahe
dc.contributor.authorPenrose, Roger
dc.contributor.authorParis, Claudio
dc.date.accessioned2019-12-19T14:04:45Z
dc.date.available2019-12-19T14:04:45Z
dc.date.issued2018-10-30
dc.description.abstractIn 2016, we published “A test of general relativity using the LARES and LAGEOS satellites and a GRACE Earth’s gravity model. Measurement of Earth’s dragging of inertial frames [1]”, a measurement of frame-dragging, a fundamental prediction of Einstein’s theory of General Relativity, using the laser-ranged satellites LARES, LAGEOS and LAGEOS 2. The formal error, or precision, of our test was about 0.2% of frame-dragging, whereas the systematic error was estimated to be about 5%. In the 2017 paper “A comment on “A test of general relativity using the LARES and LAGEOS satellites and a GRACE Earth’s gravity model by I. Ciufolini et al.”” by L. Iorio [2] (called I2017 in the following), it was incorrectly claimed that, when comparing different Earth’s gravity field models, the systematic error in our test due to the Earth’s even zonal harmonics of degree 6, 8, 10 could be as large as 15%, 6% and 36%, respectively. Furthermore, I2017 contains other, also incorrect, claims about the number of necessary significant decimal digits of the coefficients used in our test (claimed to be nine), in order to eliminate the largest uncertainties in the even zonals of degree 2 and 4, and about the non-repeatability of our test. Here we analyze and rebut those claims in I2017.en_US
dc.description.sponsorshipWe gratefully acknowledge the Italian Space Agency for the support of the LARES and LARES 2 space missions under agreements No. 2017-23-H.0 and No. 2015-021-R.O. We are also grateful to the International Laser Ranging Service (ILRS), ESA, AVIO and ELV. ECP acknowledges the support of NASA Grants NNX09AU86G and NNX14AN50G. RM acknowledges NASA Grant NNX09AU86G and NSF Grant PHY-1620610 and JCR the support of NASA Contract NNG17V105C. We thank an anonymous referee for useful comments to improve the paper.en_US
dc.description.urihttps://link.springer.com/article/10.1140/epjc/s10052-018-6303-1en_US
dc.format.extent11 pagesen_US
dc.genrejournal articlesen_US
dc.identifierdoi:10.13016/m2kfb9-wpm2
dc.identifier.citationCiufolini, Ignazio; Pavlis, Erricos C.; Ries, John; Matzner, Richard; Koenig, Rolf; Paolozzi, Antonio; Sindoni, Giampiero; Gurzadyan, Vahe; Penrose, Roger; Paris, Claudio; Reply to “A comment on “A test of general relativity using the LARES and LAGEOS satellites and a GRACE Earth gravity model, by I. Ciufolini et al.””; The European Physical Journal C 78,880 (2018); https://link.springer.com/article/10.1140/epjc/s10052-018-6303-1en_US
dc.identifier.urihttps://doi.org/10.1140/epjc/s10052-018-6303-1
dc.identifier.urihttp://hdl.handle.net/11603/16914
dc.language.isoen_USen_US
dc.publisherSpringer Berlin Heidelbergen_US
dc.relation.isAvailableAtThe University of Maryland, Baltimore County (UMBC)
dc.relation.ispartofUMBC Joint Center for Earth Systems Technology
dc.relation.ispartofUMBC Faculty Collection
dc.rightsThis item is likely protected under Title 17 of the U.S. Copyright Law. Unless on a Creative Commons license, for uses protected by Copyright Law, contact the copyright holder or the author.
dc.rightsAttribution 4.0 International (CC BY 4.0)*
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/*
dc.subjectinertial framesen_US
dc.subjectlaser-ranged satellitesen_US
dc.subjecteven zonal harmonicsen_US
dc.titleReply to “A comment on “A test of general relativity using the LARES and LAGEOS satellites and a GRACE Earth gravity model, by I. Ciufolini et al.””en_US
dc.typeTexten_US

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