An application of system identification techniques to impedance estimation in magnetotelluric surveying

Diana Ugryumova; Katrina Lau; Julio Braslavsky; Gjerrit Meinsma

doi:10.3182/20090706-3-FR-2004.00161

An application of system identification techniques to impedance estimation in magnetotelluric surveying

Diana Ugryumova, Katrina Lau, Julio Braslavsky, Gjerrit Meinsma

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › Academic › peer-review

1 Citation (Scopus)

3 Downloads (Pure)

Abstract

Magnetotelluric (MT) surveying is an Electromagnetic (EM) surveying technique used in geophysics and mineral exploration. The main problem in MT surveying is the estimation of the impedance of the ground, which is obtained as the ratio between the natural environmental electric and magnetic fields measured on the surface of the target area. Because these measurements are inherently corrupted by noise, the impedance estimate may be biased (Errors-In-Variables (EIV)), which is a difficulty well-known in MT literature and typically overcome by the use of additional independent measurements. This paper formulates the MT problem as a standard system identification problem, and uses output-error model structures to obtain scalar (SISO) and vector (TISO) ground impedance estimates. Estimation bias is minimised by selecting segments of data with high Signal-to-Noise Ratio (SNR). The SISO and TISO modelling approaches are discussed and compared on results obtained from experimental MT data.

Original language	English
Title of host publication	15th IFAC Symposium on System Identification 2009
Publisher	IFAC
Pages	970-975
Number of pages	6
ISBN (Print)	978-3-902661-47-0
DOIs	https://doi.org/10.3182/20090706-3-FR-2004.00161
Publication status	Published - 6 Jul 2009
Event	15th IFAC Symposium on System Identification, SYSID 2009 - Palais du Grand Large, Saint-Malo, France Duration: 6 Jul 2009 → 8 Jul 2009 Conference number: 15

Publication series

Name	IFAC Proceedings
Publisher	IFAC
Number	10
Volume	42
ISSN (Print)	1474-6670

Conference

Conference	15th IFAC Symposium on System Identification, SYSID 2009
Abbreviated title	SYSID
Country/Territory	France
City	Saint-Malo
Period	6/07/09 → 8/07/09

Keywords

METIS-265235
System Identification
errors-in-variables
EWI-16465
multisensorintegration
Impedance estimation
IR-69932
electromagnetic induction

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10.3182/20090706-3-FR-2004.00161

Cite this

@inproceedings{c5be9a2fef2a472e91252a7e765bd5f4,

title = "An application of system identification techniques to impedance estimation in magnetotelluric surveying",

abstract = "Magnetotelluric (MT) surveying is an Electromagnetic (EM) surveying technique used in geophysics and mineral exploration. The main problem in MT surveying is the estimation of the impedance of the ground, which is obtained as the ratio between the natural environmental electric and magnetic fields measured on the surface of the target area. Because these measurements are inherently corrupted by noise, the impedance estimate may be biased (Errors-In-Variables (EIV)), which is a difficulty well-known in MT literature and typically overcome by the use of additional independent measurements. This paper formulates the MT problem as a standard system identification problem, and uses output-error model structures to obtain scalar (SISO) and vector (TISO) ground impedance estimates. Estimation bias is minimised by selecting segments of data with high Signal-to-Noise Ratio (SNR). The SISO and TISO modelling approaches are discussed and compared on results obtained from experimental MT data.",

keywords = "METIS-265235, System Identification, errors-in-variables, EWI-16465, multisensorintegration, Impedance estimation, IR-69932, electromagnetic induction",

author = "Diana Ugryumova and Katrina Lau and Julio Braslavsky and Gjerrit Meinsma",

year = "2009",

month = jul,

day = "6",

doi = "10.3182/20090706-3-FR-2004.00161",

language = "English",

isbn = "978-3-902661-47-0",

series = "IFAC Proceedings",

publisher = "IFAC",

number = "10",

pages = "970--975",

booktitle = "15th IFAC Symposium on System Identification 2009",

note = "15th IFAC Symposium on System Identification, SYSID 2009, SYSID ; Conference date: 06-07-2009 Through 08-07-2009",

}

Ugryumova, D, Lau, K, Braslavsky, J & Meinsma, G 2009, An application of system identification techniques to impedance estimation in magnetotelluric surveying. in 15th IFAC Symposium on System Identification 2009. IFAC Proceedings, no. 10, vol. 42, IFAC, pp. 970-975, 15th IFAC Symposium on System Identification, SYSID 2009, Saint-Malo, France, 6/07/09. https://doi.org/10.3182/20090706-3-FR-2004.00161

An application of system identification techniques to impedance estimation in magnetotelluric surveying. / Ugryumova, Diana; Lau, Katrina; Braslavsky, Julio et al.
15th IFAC Symposium on System Identification 2009. IFAC, 2009. p. 970-975 (IFAC Proceedings; Vol. 42, No. 10).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › Academic › peer-review

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T1 - An application of system identification techniques to impedance estimation in magnetotelluric surveying

AU - Ugryumova, Diana

AU - Lau, Katrina

AU - Braslavsky, Julio

AU - Meinsma, Gjerrit

N1 - Conference code: 15

PY - 2009/7/6

Y1 - 2009/7/6

N2 - Magnetotelluric (MT) surveying is an Electromagnetic (EM) surveying technique used in geophysics and mineral exploration. The main problem in MT surveying is the estimation of the impedance of the ground, which is obtained as the ratio between the natural environmental electric and magnetic fields measured on the surface of the target area. Because these measurements are inherently corrupted by noise, the impedance estimate may be biased (Errors-In-Variables (EIV)), which is a difficulty well-known in MT literature and typically overcome by the use of additional independent measurements. This paper formulates the MT problem as a standard system identification problem, and uses output-error model structures to obtain scalar (SISO) and vector (TISO) ground impedance estimates. Estimation bias is minimised by selecting segments of data with high Signal-to-Noise Ratio (SNR). The SISO and TISO modelling approaches are discussed and compared on results obtained from experimental MT data.

AB - Magnetotelluric (MT) surveying is an Electromagnetic (EM) surveying technique used in geophysics and mineral exploration. The main problem in MT surveying is the estimation of the impedance of the ground, which is obtained as the ratio between the natural environmental electric and magnetic fields measured on the surface of the target area. Because these measurements are inherently corrupted by noise, the impedance estimate may be biased (Errors-In-Variables (EIV)), which is a difficulty well-known in MT literature and typically overcome by the use of additional independent measurements. This paper formulates the MT problem as a standard system identification problem, and uses output-error model structures to obtain scalar (SISO) and vector (TISO) ground impedance estimates. Estimation bias is minimised by selecting segments of data with high Signal-to-Noise Ratio (SNR). The SISO and TISO modelling approaches are discussed and compared on results obtained from experimental MT data.

KW - METIS-265235

KW - System Identification

KW - errors-in-variables

KW - EWI-16465

KW - multisensorintegration

KW - Impedance estimation

KW - IR-69932

KW - electromagnetic induction

U2 - 10.3182/20090706-3-FR-2004.00161

DO - 10.3182/20090706-3-FR-2004.00161

M3 - Conference contribution

SN - 978-3-902661-47-0

T3 - IFAC Proceedings

SP - 970

EP - 975

BT - 15th IFAC Symposium on System Identification 2009

PB - IFAC

T2 - 15th IFAC Symposium on System Identification, SYSID 2009

Y2 - 6 July 2009 through 8 July 2009

ER -

An application of system identification techniques to impedance estimation in magnetotelluric surveying

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