General Relativity Measurements in the Field of Earth with Laser-Ranged Satellites: State of the Art and Perspectives
Journal
Date Issued
2019
Author(s)
•
Anselmo, Luciano
•
Bassan, Massimo
•
•
Pardini, Carmen
•
•
Pucacco, Giuseppe
•
Abstract
Recent results of the LARASE research program in terms of model improvements and
relativistic measurements are presented. In particular, the results regarding the development of
new models for the non-gravitational perturbations that affect the orbit of the LAGEOS and LARES
satellites are described and discussed. These are subtle and complex effects that need a deep
knowledge of the structure and the physical characteristics of the satellites in order to be correctly
accounted for. In the field of gravitational measurements, we present a new measurement of the
relativistic Lense-Thirring precession with a 0.5% precision. In this measurement, together with
the relativistic effect we also estimated two even zonal harmonics coefficients. The uncertainties of
the even zonal harmonics of the gravitational field of the Earth have been responsible, until now,
of the larger systematic uncertainty in the error budget of this kind of measurements. For this
reason, the role of the errors related to the model used for the gravitational field of the Earth in these
measurements is discussed. In particular, emphasis is given to GRACE temporal models, that strongly
help to reduce this kind of systematic errors.
Volume
5
Issue
6
Start page
141
Issn Identifier
2218-1997
Ads BibCode
2019Univ....5..141L
Rights
open.access
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