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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• 作者：Lorenzo Iorio
• 刊名：The European Physical Journal C
• 出版年：2017
• 出版时间：February 2017
• 年：2017
• 卷：77
• 期：2
• 全文大小：494KB
• 刊物类别：Physics and Astronomy
• 刊物主题：Elementary Particles, Quantum Field Theory; Nuclear Physics, Heavy Ions, Hadrons; Quantum Field Theories, String Theory; Measurement Science and Instrumentation; Astronomy, Astrophysics and Cosmology;
• 出版者：Springer Berlin Heidelberg
• ISSN：1434-6052
• 卷排序：77

文摘

Recently, Ciufolini et al. reported on a test of the general relativistic gravitomagnetic Lense–Thirring effect by analyzing about 3.5 years of laser ranging data to the LAGEOS, LAGEOS II, LARES geodetic satellites orbiting the Earth. By using the GRACE-based GGM05S Earth’s global gravity model and a linear combination of the nodes \( \Omega \) of the three satellites designed to remove the impact of errors in the first two even zonal harmonic coefficients \(J_2, J_4\) of the multipolar expansion of the Newtonian part of the Earth’s gravitational potential, they claimed an overall accuracy of \({5}\%\) for the Lense–Thirring caused node motion. We show that the scatter in the nominal values of the uncancelled even zonals of degree \(\ell = 6,~8,~{10}\) from some of the most recent global gravity models does not yet allow to reach unambiguously and univocally the expected \({\approx }1\%\) level, being large up to \({\lesssim }15\%~(\ell =6),~6\%~(\ell =8),~36\%~(\ell =10)\) for some pairs of models.