LARES-2 contribution to global geodetic parameters from the combined LAGEOS-LARES solutions.
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| Title: | LARES-2 contribution to global geodetic parameters from the combined LAGEOS-LARES solutions. |
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| Authors: | Sośnica, K.1 (AUTHOR) krzysztof.sosnica@upwr.edu.pl, Gałdyn, F.1 (AUTHOR), Zajdel, R.1,2 (AUTHOR), Strugarek, D.1 (AUTHOR), Najder, J.1 (AUTHOR), Nowak, A.1 (AUTHOR), Mikoś, M.1 (AUTHOR), Kur, T.1 (AUTHOR), Bosy, J.1,3 (AUTHOR), Bury, G.1 (AUTHOR) |
| Source: | Journal of Geodesy. Jan2025, Vol. 99 Issue 1, p1-17. 17p. |
| Subjects: | Orbit determination, Geodetic satellites, Laser ranging, Orbits (Astronomy), General relativity (Physics), Orbits of artificial satellites |
| Abstract: | LARES-2 is a new geodetic satellite designed for high-accuracy satellite laser ranging. The orbit altitude of LARES-2 is similar to that of LAGEOS-1, whereas the inclination angle of 70° complements the LAGEOS-1 inclination of 110°; hence, both satellites form the butterfly configuration for the verification of the Lense–Thirring effect. Although the major objective of LARES-2 is testing general relativity, LARES-2 substantially contributes to geodesy in terms of the realization of terrestrial reference frames, recovery of the geocenter motion, pole coordinates, length-of-day, and low-degree gravity field coefficients. We analyze the first 1.5 years of LARES-2 data and test different empirical orbit models for LARES-2 with and without co-estimating low-degree gravity field coefficients to find the best combination strategy with LAGEOS satellites. We found that LARES-2 orbit determination is more accurate than that of LAGEOS-1/2 due to a different satellite construction consisting of a solid sphere with no inner structure. Neither the correction for D0 nor the empirical once-per-revolution along-track accelerations SC/SS have to be estimated for LARES-2 when co-estimating gravity field coefficients. The only empirical parameter needed for LARES-2 is the constant along-track acceleration S0 to compensate for the Yarkovsky–Schach effect. On the contrary, for LAGEOS-1/2, the non-gravitational perturbations affect C30 and Z geocenter estimates when once-per-revolution parameters are not estimated. LARES-2 does not face this issue. LARES-2 improves the formal errors of the Z geocenter component by up to 59% and C20 by up to 40% compared to the combined LAGEOS-1/2 solutions and provides C30 estimates unaffected by thermal orbit modeling issues. [ABSTRACT FROM AUTHOR] |
| Copyright of Journal of Geodesy is the property of Springer Nature and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) | |
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| Header | DbId: egs DbLabel: Engineering Source An: 181604952 AccessLevel: 6 PubType: Academic Journal PubTypeId: academicJournal PreciseRelevancyScore: 0 |
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| Items | – Name: Title Label: Title Group: Ti Data: LARES-2 contribution to global geodetic parameters from the combined LAGEOS-LARES solutions. – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Sośnica%2C+K%2E%22">Sośnica, K.</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> krzysztof.sosnica@upwr.edu.pl</i><br /><searchLink fieldCode="AR" term="%22Gałdyn%2C+F%2E%22">Gałdyn, F.</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Zajdel%2C+R%2E%22">Zajdel, R.</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Strugarek%2C+D%2E%22">Strugarek, D.</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Najder%2C+J%2E%22">Najder, J.</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Nowak%2C+A%2E%22">Nowak, A.</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Mikoś%2C+M%2E%22">Mikoś, M.</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Kur%2C+T%2E%22">Kur, T.</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Bosy%2C+J%2E%22">Bosy, J.</searchLink><relatesTo>1,3</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Bury%2C+G%2E%22">Bury, G.</searchLink><relatesTo>1</relatesTo> (AUTHOR) – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22Journal+of+Geodesy%22">Journal of Geodesy</searchLink>. Jan2025, Vol. 99 Issue 1, p1-17. 17p. – Name: Subject Label: Subjects Group: Su Data: <searchLink fieldCode="DE" term="%22Orbit+determination%22">Orbit determination</searchLink><br /><searchLink fieldCode="DE" term="%22Geodetic+satellites%22">Geodetic satellites</searchLink><br /><searchLink fieldCode="DE" term="%22Laser+ranging%22">Laser ranging</searchLink><br /><searchLink fieldCode="DE" term="%22Orbits+%28Astronomy%29%22">Orbits (Astronomy)</searchLink><br /><searchLink fieldCode="DE" term="%22General+relativity+%28Physics%29%22">General relativity (Physics)</searchLink><br /><searchLink fieldCode="DE" term="%22Orbits+of+artificial+satellites%22">Orbits of artificial satellites</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: LARES-2 is a new geodetic satellite designed for high-accuracy satellite laser ranging. The orbit altitude of LARES-2 is similar to that of LAGEOS-1, whereas the inclination angle of 70° complements the LAGEOS-1 inclination of 110°; hence, both satellites form the butterfly configuration for the verification of the Lense–Thirring effect. Although the major objective of LARES-2 is testing general relativity, LARES-2 substantially contributes to geodesy in terms of the realization of terrestrial reference frames, recovery of the geocenter motion, pole coordinates, length-of-day, and low-degree gravity field coefficients. We analyze the first 1.5 years of LARES-2 data and test different empirical orbit models for LARES-2 with and without co-estimating low-degree gravity field coefficients to find the best combination strategy with LAGEOS satellites. We found that LARES-2 orbit determination is more accurate than that of LAGEOS-1/2 due to a different satellite construction consisting of a solid sphere with no inner structure. Neither the correction for D0 nor the empirical once-per-revolution along-track accelerations SC/SS have to be estimated for LARES-2 when co-estimating gravity field coefficients. The only empirical parameter needed for LARES-2 is the constant along-track acceleration S0 to compensate for the Yarkovsky–Schach effect. On the contrary, for LAGEOS-1/2, the non-gravitational perturbations affect C30 and Z geocenter estimates when once-per-revolution parameters are not estimated. LARES-2 does not face this issue. LARES-2 improves the formal errors of the Z geocenter component by up to 59% and C20 by up to 40% compared to the combined LAGEOS-1/2 solutions and provides C30 estimates unaffected by thermal orbit modeling issues. [ABSTRACT FROM AUTHOR] – Name: AbstractSuppliedCopyright Label: Group: Ab Data: <i>Copyright of Journal of Geodesy is the property of Springer Nature and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.) |
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| RecordInfo | BibRecord: BibEntity: Identifiers: – Type: doi Value: 10.1007/s00190-024-01925-3 Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 17 StartPage: 1 Subjects: – SubjectFull: Orbit determination Type: general – SubjectFull: Geodetic satellites Type: general – SubjectFull: Laser ranging Type: general – SubjectFull: Orbits (Astronomy) Type: general – SubjectFull: General relativity (Physics) Type: general – SubjectFull: Orbits of artificial satellites Type: general Titles: – TitleFull: LARES-2 contribution to global geodetic parameters from the combined LAGEOS-LARES solutions. Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Sośnica, K. – PersonEntity: Name: NameFull: Gałdyn, F. – PersonEntity: Name: NameFull: Zajdel, R. – PersonEntity: Name: NameFull: Strugarek, D. – PersonEntity: Name: NameFull: Najder, J. – PersonEntity: Name: NameFull: Nowak, A. – PersonEntity: Name: NameFull: Mikoś, M. – PersonEntity: Name: NameFull: Kur, T. – PersonEntity: Name: NameFull: Bosy, J. – PersonEntity: Name: NameFull: Bury, G. IsPartOfRelationships: – BibEntity: Dates: – D: 01 M: 01 Text: Jan2025 Type: published Y: 2025 Identifiers: – Type: issn-print Value: 09497714 Numbering: – Type: volume Value: 99 – Type: issue Value: 1 Titles: – TitleFull: Journal of Geodesy Type: main |
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