An improved processing sequence for uncorrelated Chirp sonar data.
Saved in:
| Title: | An improved processing sequence for uncorrelated Chirp sonar data. |
|---|---|
| Authors: | Baradello, Luca1 lbaradello@ogs.trieste.it |
| Source: | Marine Geophysical Research. Dec2014, Vol. 35 Issue 4, p337-344. 8p. |
| Subjects: | Marine geophysics, Ultrasonic equipment, Sonar, Detectors, Engineering instruments |
| Abstract: | Chirp sonar systems can be used to obtain high resolution seismic reflection images of the sub-seafloor during marine surveys. The exact knowledge of the Chirp signature allows the use of deterministic algorithms to process the data, similarly to that applied to Vibroseis data on land. Here, it is described an innovative processing sequence to be applied to uncorrelated Chirp data, which can improve vertical and lateral resolution compared to conventional methods. It includes application of a Wiener filter to transform a frequency-modulated sweep into a minimum-phase pulse sequence. In this way, the data become causal and can undergo predictive deconvolution to reduce ringing and enhance vertical resolution. Afterwards, FX-deconvolution and Stolt migration can be applied to obtain an improved imaging of the subsurface. The result of this procedure is a seismic reflection image with higher resolution than traditional ones, which are normally represented using the envelope function of the signal. This technique can be particularly useful for engineering-geotechnical surveys and archaeological investigations that require a fine detail imaging of the uppermost meters of the sub-seafloor. [ABSTRACT FROM AUTHOR] |
| Copyright of Marine Geophysical Research 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.) | |
| Database: | Engineering Source |
| FullText | Links: – Type: pdflink Text: Availability: 0 |
|---|---|
| Header | DbId: egs DbLabel: Engineering Source An: 99387832 AccessLevel: 6 PubType: Academic Journal PubTypeId: academicJournal PreciseRelevancyScore: 0 |
| IllustrationInfo | |
| Items | – Name: Title Label: Title Group: Ti Data: An improved processing sequence for uncorrelated Chirp sonar data. – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Baradello%2C+Luca%22">Baradello, Luca</searchLink><relatesTo>1</relatesTo><i> lbaradello@ogs.trieste.it</i> – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22Marine+Geophysical+Research%22">Marine Geophysical Research</searchLink>. Dec2014, Vol. 35 Issue 4, p337-344. 8p. – Name: Subject Label: Subjects Group: Su Data: <searchLink fieldCode="DE" term="%22Marine+geophysics%22">Marine geophysics</searchLink><br /><searchLink fieldCode="DE" term="%22Ultrasonic+equipment%22">Ultrasonic equipment</searchLink><br /><searchLink fieldCode="DE" term="%22Sonar%22">Sonar</searchLink><br /><searchLink fieldCode="DE" term="%22Detectors%22">Detectors</searchLink><br /><searchLink fieldCode="DE" term="%22Engineering+instruments%22">Engineering instruments</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: Chirp sonar systems can be used to obtain high resolution seismic reflection images of the sub-seafloor during marine surveys. The exact knowledge of the Chirp signature allows the use of deterministic algorithms to process the data, similarly to that applied to Vibroseis data on land. Here, it is described an innovative processing sequence to be applied to uncorrelated Chirp data, which can improve vertical and lateral resolution compared to conventional methods. It includes application of a Wiener filter to transform a frequency-modulated sweep into a minimum-phase pulse sequence. In this way, the data become causal and can undergo predictive deconvolution to reduce ringing and enhance vertical resolution. Afterwards, FX-deconvolution and Stolt migration can be applied to obtain an improved imaging of the subsurface. The result of this procedure is a seismic reflection image with higher resolution than traditional ones, which are normally represented using the envelope function of the signal. This technique can be particularly useful for engineering-geotechnical surveys and archaeological investigations that require a fine detail imaging of the uppermost meters of the sub-seafloor. [ABSTRACT FROM AUTHOR] – Name: AbstractSuppliedCopyright Label: Group: Ab Data: <i>Copyright of Marine Geophysical Research 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.) |
| PLink | https://search.ebscohost.com/login.aspx?direct=true&site=eds-live&db=egs&AN=99387832 |
| RecordInfo | BibRecord: BibEntity: Identifiers: – Type: doi Value: 10.1007/s11001-014-9220-1 Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 8 StartPage: 337 Subjects: – SubjectFull: Marine geophysics Type: general – SubjectFull: Ultrasonic equipment Type: general – SubjectFull: Sonar Type: general – SubjectFull: Detectors Type: general – SubjectFull: Engineering instruments Type: general Titles: – TitleFull: An improved processing sequence for uncorrelated Chirp sonar data. Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Baradello, Luca IsPartOfRelationships: – BibEntity: Dates: – D: 01 M: 12 Text: Dec2014 Type: published Y: 2014 Identifiers: – Type: issn-print Value: 00253235 Numbering: – Type: volume Value: 35 – Type: issue Value: 4 Titles: – TitleFull: Marine Geophysical Research Type: main |
| ResultId | 1 |
