P-wave velocity and attenuation 1/Q data of water-saturated sand pack (from dry to full saturation) at 10 kilohertz frequency under 10 MPa effective pressure, 2022 - 2023.

The data consist of P-wave velocity and attenuation (1/Q) of a water-saturated sand pack from dry to full saturation. We used an acoustic pulse tube, allowing us to measure the sample at a sonic frequency range (1-20 kHz, with a center frequency of 10 kHz) under 10 MPa effective pressure (with atmospheric pore pressure). The data were acquired in the Pulse Tube Laboratories at the National Oceanography Centre (NOC) in Southampton. The method involves measuring signal amplitude time series from the sample and a water-filled pulse tube. The time-domain data are transformed into the frequency domain using Fast Fourier Transform (FFT), and the raw signals are deconvolved with the chirp source signal to obtain the impulse response. Nonlinear inversion is used to minimize an objective function, derived from initial time-domain signal estimates, to determine the sample's complex velocity.

Date (Creation): 2024-08-02

Citation identifier: http://data.bgs.ac.uk/id/dataHolding/13608263

Point of contact

Organisation name	Individual name	Electronic mail address	Role
University of Southampton	Hanif Santyabudhi Sutiyoso	not available	Originator
British Geological Survey	Enquiries	not available	Distributor
British Geological Survey	Enquiries	not available	Point of contact

Maintenance and update frequency: notApplicable

GEMET - INSPIRE themes, version 1.0

Geology

BGS Thesaurus of Geosciences

Attenuation
Acoustics
NGDC Deposited Data

dataCentre

NGDC Deposited Data

Keywords

NERC_DDC

Access constraints: Other restrictions

Other constraints: licenceOGL

Other constraints: Available under the Open Government Licence subject to the following acknowledgement accompanying the reproduced NERC materials "Contains NERC materials ©NERC [year]"

Use constraints: Other restrictions

Other constraints: The copyright of materials derived from the British Geological Survey's work is vested in the Natural Environment Research Council [NERC]. No part of this work may be reproduced or transmitted in any form or by any means, or stored in a retrieval system of any nature, without the prior permission of the copyright holder, via the BGS Intellectual Property Rights Manager. Use by customers of information provided by the BGS, is at the customer's own risk. In view of the disparate sources of information at BGS's disposal, including such material donated to BGS, that BGS accepts in good faith as being accurate, the Natural Environment Research Council (NERC) gives no warranty, expressed or implied, as to the quality or accuracy of the information supplied, or to the information's suitability for any use. NERC/BGS accepts no liability whatever in respect of loss, damage, injury or other occurence however caused.

Other constraints: Available under the Open Government Licence subject to the following acknowledgement accompanying the reproduced NERC materials "Contains NERC materials ©NERC [year]"

Language: English

Topic category

Geoscientific information

Begin date: 2022-01-03

End date: 2023-06-02

Reference System Information

No information provided.

Distribution format

Name	Version
Excel Comma Separated Value (csv)

Distributor contact

Organisation name	Individual name	Electronic mail address	Role
British Geological Survey	Enquiries	not available	Distributor

OnLine resource

Protocol	Linkage	Name
	https://webapps.bgs.ac.uk/services/ngdc/accessions/index.html#item185879	Data

Hierarchy level: Non geographic dataset

Other: non geographic dataset

Conformance result

Title: INSPIRE Implementing rules laying down technical arrangements for the interoperability and harmonisation of Geology

Date (Publication): 2011

Explanation: See the referenced specification

Pass: No

Conformance result

Title: Commission Regulation (EU) No 1089/2010 of 23 November 2010 implementing Directive 2007/2/EC of the European Parliament and of the Council as regards interoperability of spatial data sets and services

Date (Publication): 2010-12-08

Explanation: See http://eur-lex.europa.eu/LexUriServ/LexUriServ.do?uri=OJ:L:2010:323:0011:0102:EN:PDF

Pass: No

Statement: The method involves measuring signal amplitude time series from the sample and a water-filled pulse tube. The time-domain data are transformed into the frequency domain using Fast Fourier Transform (FFT), and the raw signals are deconvolved with the chirp source signal to obtain the impulse response. Time-domain gating is applied to eliminate multiple reflections. Nonlinear inversion is used to minimize an objective function, derived from initial time-domain signal estimates, to determine the sample's complex velocity. Assumptions include a linear time-invariant system and plane wave propagation, simplifying the model to a one-dimensional transmission line system.