It is only a banana-Traveltime sensitivity kernels using the unwrapped phase

Handle URI:
http://hdl.handle.net/10754/575760
Title:
It is only a banana-Traveltime sensitivity kernels using the unwrapped phase
Authors:
Djebbi, R.; Alkhalifah, Tariq Ali ( 0000-0002-9363-9799 )
Abstract:
Traveltime sensitivity kernels for finite-frequency traveltimes computed using the Born or Rytov approximations admits hallow banana shaped responses in the plane of propagation and a circular doughnut shaped responses in the cross section. This suggests that finite-frequency traveltimes are insensitive to velocity information along the infinite-frequency ray path, which is obviously inaccurate and creates a disconnect in the traveltime dependency on frequency. Using the instantaneous traveltime of the wavefield, which is capable of unwrapping the phase function, we obtain traveltime sensitivity kernels that have plain banana shape responses, with the thickness of the banana governed by the investigated frequency. This result confirms that the hallow banana shape is simply a result of the wrapping of the phase of the wavefield, in which Born nor Rytov approximations can properly deal with. The instantaneous traveltime can, thus, mitigate the nonlinearity problem encountered in finite-frequency traveltime inversions that may arise from these hallow banana sensitivity kernels.
KAUST Department:
Physical Sciences and Engineering (PSE) Division; Environmental Science and Engineering Program; Earth Science and Engineering Program
Publisher:
EAGE Publications
Journal:
74th EAGE Conference and Exhibition incorporating EUROPEC 2012
Conference/Event name:
74th EAGE Conference and Exhibition incorporating EUROPEC 2012
Issue Date:
2012
DOI:
10.3997/2214-4609.20148677
Type:
Conference Paper
ISBN:
9781629937908
Appears in Collections:
Conference Papers; Environmental Science and Engineering Program; Environmental Science and Engineering Program; Physical Sciences and Engineering (PSE) Division; Physical Sciences and Engineering (PSE) Division; Earth Science and Engineering Program; Earth Science and Engineering Program

Full metadata record

DC FieldValue Language
dc.contributor.authorDjebbi, R.en
dc.contributor.authorAlkhalifah, Tariq Alien
dc.date.accessioned2015-08-24T09:25:27Zen
dc.date.available2015-08-24T09:25:27Zen
dc.date.issued2012en
dc.identifier.isbn9781629937908en
dc.identifier.doi10.3997/2214-4609.20148677en
dc.identifier.urihttp://hdl.handle.net/10754/575760en
dc.description.abstractTraveltime sensitivity kernels for finite-frequency traveltimes computed using the Born or Rytov approximations admits hallow banana shaped responses in the plane of propagation and a circular doughnut shaped responses in the cross section. This suggests that finite-frequency traveltimes are insensitive to velocity information along the infinite-frequency ray path, which is obviously inaccurate and creates a disconnect in the traveltime dependency on frequency. Using the instantaneous traveltime of the wavefield, which is capable of unwrapping the phase function, we obtain traveltime sensitivity kernels that have plain banana shape responses, with the thickness of the banana governed by the investigated frequency. This result confirms that the hallow banana shape is simply a result of the wrapping of the phase of the wavefield, in which Born nor Rytov approximations can properly deal with. The instantaneous traveltime can, thus, mitigate the nonlinearity problem encountered in finite-frequency traveltime inversions that may arise from these hallow banana sensitivity kernels.en
dc.publisherEAGE Publicationsen
dc.titleIt is only a banana-Traveltime sensitivity kernels using the unwrapped phaseen
dc.typeConference Paperen
dc.contributor.departmentPhysical Sciences and Engineering (PSE) Divisionen
dc.contributor.departmentEnvironmental Science and Engineering Programen
dc.contributor.departmentEarth Science and Engineering Programen
dc.identifier.journal74th EAGE Conference and Exhibition incorporating EUROPEC 2012en
dc.conference.date4-7 June 2012en
dc.conference.name74th EAGE Conference and Exhibition incorporating EUROPEC 2012en
dc.conference.locationCopenhagen, Denmarken
kaust.authorAlkhalifah, Tariq Alien
kaust.authorDjebbi, R.en
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