Remote reference magnetotelluric impedance estimation of wideband data using hybrid algorithm

Precise and accurate determination of the magnetotelluric (MT) impedance is fundamental to valid interpretation. This paper deals with the results of hybrid processing schemes in conjunction with the remote reference (RR), for a typical site out of several sites collected over the wide band data (∼1...

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Veröffentlicht in:	Journal of Geophysical Research: Solid Earth 2006-11, Vol.111 (B11), p.n/a
Hauptverfasser:	Shalivahan, Sinharay, Rajib K., Bhattacharya, Bimalendu B.
Format:	Artikel
Sprache:	eng
Schlagworte:	dead band Earth sciences Earth, ocean, space Exact sciences and technology extra hybrid hybrid impedance magnetotelluric RME
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container_issue	B11
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container_title	Journal of Geophysical Research: Solid Earth
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creator	Shalivahan Sinharay, Rajib K. Bhattacharya, Bimalendu B.
description	Precise and accurate determination of the magnetotelluric (MT) impedance is fundamental to valid interpretation. This paper deals with the results of hybrid processing schemes in conjunction with the remote reference (RR), for a typical site out of several sites collected over the wide band data (∼103 to 10−3 Hz). The standard practice of MT impedance estimation is the use of robust processing in conjunction with the remote referencing. The estimation by robust technique helps in reducing the effect of outliers in the electric field but is often not sensitive to the exceptional predictor (magnetic field) data, which are called leverage points. The data processed with robust M estimation (RME) exacerbated the bias problem in the dead band. The application of hybrid (coherence weighted estimation (CWE) + RME, rho‐variance weighting + RME) and extra hybrid (CWE + rho variance + RME) approach helps in reducing the influence of both the outliers in the electric field and the leverage points. These two approaches perform considerably better than either data weighting scheme by itself.
doi_str_mv	10.1029/2006JB004330
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The application of hybrid (coherence weighted estimation (CWE) + RME, rho‐variance weighting + RME) and extra hybrid (CWE + rho variance + RME) approach helps in reducing the influence of both the outliers in the electric field and the leverage points. These two approaches perform considerably better than either data weighting scheme by itself.</description><subject>dead band</subject><subject>Earth sciences</subject><subject>Earth, ocean, space</subject><subject>Exact sciences and technology</subject><subject>extra hybrid</subject><subject>hybrid</subject><subject>impedance</subject><subject>magnetotelluric</subject><subject>RME</subject><issn>0148-0227</issn><issn>2156-2202</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2006</creationdate><recordtype>article</recordtype><recordid>eNp9kE9LAzEQxYMoWLQ3P0Au3lydJNvN7tEWu1pKxVrxJCGbZNvo_inJltpvb0pFPTmXgZn3G-Y9hC4IXBOg2Q0FSCZDgJgxOEI9SgZJRCnQY9QDEqcRUMpPUd_7dwgVD5IYSA-9zU3ddgY7UxpnGmVwLZeN6cKsqjbOKmzrtdFyvzG-s7XsbNvgtsRbq00hG4217CTeeNss8WpXOKuxrJats92qPkcnpay86X_3M_QyvluM7qPpY_4wup1GknFgER9wlcSE01QRzgqmCpKVPNMp11kmFbDSFKliNCtVzIAnnGtlElVIoIkstWZn6OpwV7nW--BFrF141e0EAbFPR_xNJ8gvD_K19EpWpQv2rP9lUpbGKdCgYwfd1lZm9-9NMcnnwxBzygIVHSjrO_P5Q0n3IRLO-EC8znLxlM3yMXteiDH7AhAmg18</recordid><startdate>200611</startdate><enddate>200611</enddate><creator>Shalivahan</creator><creator>Sinharay, Rajib K.</creator><creator>Bhattacharya, Bimalendu B.</creator><general>Blackwell Publishing Ltd</general><general>American Geophysical Union</general><scope>BSCLL</scope><scope>IQODW</scope><scope>AAYXX</scope><scope>CITATION</scope></search><sort><creationdate>200611</creationdate><title>Remote reference magnetotelluric impedance estimation of wideband data using hybrid algorithm</title><author>Shalivahan ; Sinharay, Rajib K. ; Bhattacharya, Bimalendu B.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-a3703-757c641728c173b3cb19f79d87d99ac03feb8c329fc4307677dce6cba026afdd3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2006</creationdate><topic>dead band</topic><topic>Earth sciences</topic><topic>Earth, ocean, space</topic><topic>Exact sciences and technology</topic><topic>extra hybrid</topic><topic>hybrid</topic><topic>impedance</topic><topic>magnetotelluric</topic><topic>RME</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Shalivahan</creatorcontrib><creatorcontrib>Sinharay, Rajib K.</creatorcontrib><creatorcontrib>Bhattacharya, Bimalendu B.</creatorcontrib><collection>Istex</collection><collection>Pascal-Francis</collection><collection>CrossRef</collection><jtitle>Journal of Geophysical Research: Solid Earth</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Shalivahan</au><au>Sinharay, Rajib K.</au><au>Bhattacharya, Bimalendu B.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Remote reference magnetotelluric impedance estimation of wideband data using hybrid algorithm</atitle><jtitle>Journal of Geophysical Research: Solid Earth</jtitle><addtitle>J. Geophys. Res</addtitle><date>2006-11</date><risdate>2006</risdate><volume>111</volume><issue>B11</issue><epage>n/a</epage><issn>0148-0227</issn><eissn>2156-2202</eissn><abstract>Precise and accurate determination of the magnetotelluric (MT) impedance is fundamental to valid interpretation. This paper deals with the results of hybrid processing schemes in conjunction with the remote reference (RR), for a typical site out of several sites collected over the wide band data (∼103 to 10−3 Hz). The standard practice of MT impedance estimation is the use of robust processing in conjunction with the remote referencing. The estimation by robust technique helps in reducing the effect of outliers in the electric field but is often not sensitive to the exceptional predictor (magnetic field) data, which are called leverage points. The data processed with robust M estimation (RME) exacerbated the bias problem in the dead band. 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subjects	dead band Earth sciences Earth, ocean, space Exact sciences and technology extra hybrid hybrid impedance magnetotelluric RME
title	Remote reference magnetotelluric impedance estimation of wideband data using hybrid algorithm
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