GNSS-A Network Solution with Zenith Acoustic Delay Estimation.
| Title: | GNSS-A Network Solution with Zenith Acoustic Delay Estimation. |
|---|---|
| Authors: | Xue, Shuqiang1 (AUTHOR) xuesq@casm.ac.cn, Yang, Yuanxi1,2 (AUTHOR), Yang, Wenlong1 (AUTHOR), Li, Jingsen1,3 (AUTHOR) |
| Source: | Marine Geodesy. May2024, Vol. 47 Issue 3, p237-268. 32p. |
| Subject Terms: | *TIME delay estimation, *GLOBAL Positioning System, *RAY tracing algorithms, *SPATIO-temporal variation, *SPEED of sound |
| Abstract: | The ocean sound speed changes drastically with time and space. It is almost impossible to achieve centimeter-level-precision Global Navigation Satellite System (GNSS)-Acoustic (GNSS-A) positioning without regarding spatio-temporal variations of sound speed. Inspired by the atmospheric delay estimation, we define zenith acoustic delay (ZAD) as the zenith-direction ranging error sourced by the sound speed variations, and then it is decomposed into one temporal component and two horizontal components for the sound speed variations in time and space, respectively. We propose a network solution with the three ZAD components of each seafloor geodetic point as common parameters to be estimated, and then present a piece-wise estimation to characterize their time-varying nature. To remedy the ray bending effect this study is implemented in the context of the ray tracing algorithm based on a reference sound speed profile (SSP). Experimental tests show that the proposed network solution improves ZAD estimation and results in a better position determination as compared to the single-point positioning (SPP) solution. The proposed network solution for a single campaign can achieve a horizontal positioning precision better than 5 cm (1-sigma) for the seafloor geodetic array centroid. The temporal variation of ZAD is up to one meter while the horizontal variations vary within a few decimeters in the time domain and show an azimuthal asymmetry in space. [ABSTRACT FROM AUTHOR] |
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| Items | – Name: Title Label: Title Group: Ti Data: GNSS-A Network Solution with Zenith Acoustic Delay Estimation. – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Xue%2C+Shuqiang%22">Xue, Shuqiang</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> xuesq@casm.ac.cn</i><br /><searchLink fieldCode="AR" term="%22Yang%2C+Yuanxi%22">Yang, Yuanxi</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Yang%2C+Wenlong%22">Yang, Wenlong</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Li%2C+Jingsen%22">Li, Jingsen</searchLink><relatesTo>1,3</relatesTo> (AUTHOR) – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22Marine+Geodesy%22">Marine Geodesy</searchLink>. May2024, Vol. 47 Issue 3, p237-268. 32p. – Name: Subject Label: Subject Terms Group: Su Data: *<searchLink fieldCode="DE" term="%22TIME+delay+estimation%22">TIME delay estimation</searchLink><br />*<searchLink fieldCode="DE" term="%22GLOBAL+Positioning+System%22">GLOBAL Positioning System</searchLink><br />*<searchLink fieldCode="DE" term="%22RAY+tracing+algorithms%22">RAY tracing algorithms</searchLink><br />*<searchLink fieldCode="DE" term="%22SPATIO-temporal+variation%22">SPATIO-temporal variation</searchLink><br />*<searchLink fieldCode="DE" term="%22SPEED+of+sound%22">SPEED of sound</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: The ocean sound speed changes drastically with time and space. It is almost impossible to achieve centimeter-level-precision Global Navigation Satellite System (GNSS)-Acoustic (GNSS-A) positioning without regarding spatio-temporal variations of sound speed. Inspired by the atmospheric delay estimation, we define zenith acoustic delay (ZAD) as the zenith-direction ranging error sourced by the sound speed variations, and then it is decomposed into one temporal component and two horizontal components for the sound speed variations in time and space, respectively. We propose a network solution with the three ZAD components of each seafloor geodetic point as common parameters to be estimated, and then present a piece-wise estimation to characterize their time-varying nature. To remedy the ray bending effect this study is implemented in the context of the ray tracing algorithm based on a reference sound speed profile (SSP). Experimental tests show that the proposed network solution improves ZAD estimation and results in a better position determination as compared to the single-point positioning (SPP) solution. The proposed network solution for a single campaign can achieve a horizontal positioning precision better than 5 cm (1-sigma) for the seafloor geodetic array centroid. The temporal variation of ZAD is up to one meter while the horizontal variations vary within a few decimeters in the time domain and show an azimuthal asymmetry in space. [ABSTRACT FROM AUTHOR] – Name: AbstractSuppliedCopyright Label: Group: Ab Data: <i>Copyright of Marine Geodesy is the property of Taylor & Francis Ltd and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. 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: 10.1080/01490419.2024.2307932 Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 32 StartPage: 237 Subjects: – SubjectFull: TIME delay estimation Type: general – SubjectFull: GLOBAL Positioning System Type: general – SubjectFull: RAY tracing algorithms Type: general – SubjectFull: SPATIO-temporal variation Type: general – SubjectFull: SPEED of sound Type: general Titles: – TitleFull: GNSS-A Network Solution with Zenith Acoustic Delay Estimation. Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Xue, Shuqiang – PersonEntity: Name: NameFull: Yang, Yuanxi – PersonEntity: Name: NameFull: Yang, Wenlong – PersonEntity: Name: NameFull: Li, Jingsen IsPartOfRelationships: – BibEntity: Dates: – D: 01 M: 05 Text: May2024 Type: published Y: 2024 Identifiers: – Type: issn-print Value: 01490419 Numbering: – Type: volume Value: 47 – Type: issue Value: 3 Titles: – TitleFull: Marine Geodesy Type: main |
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