The Society of Exploration Geophysicists MT EMAP Data Interchange Standard
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The Society of Exploration Geophysicists MT EMAP Data Interchange Standard
The Society of Exploration GeophysicistsMT/EMAPData Interchange standard„ 1989. 1991 Society of Exploration Geophysicists. All rights reserved. Publis The Society of Exploration Geophysicists MT EMAP Data Interchange Standardshed 1991. Printed in the USAhttps://khothuvien.cori!IntroductionIn early 1986. representatives from some of the major users of magnetotelluric (MT) and electromagnetic array profiling (EMAP) data formed an ad hoc committee to investigate a standard for the interchange and archiving of data. The ori The Society of Exploration Geophysicists MT EMAP Data Interchange Standardginal committee consisted of Richard Sigal (Amoco). Truman Holcombe (Standard), Roy Warren (Exxon) and Joe McNutt (Shell).By June 1986. the committeeThe Society of Exploration Geophysicists MT EMAP Data Interchange Standard
produced a first draft describing an industry-wide standard for the interchange of MT and EMAP data. Over the course of the next sixteen months, the sThe Society of Exploration GeophysicistsMT/EMAPData Interchange standard„ 1989. 1991 Society of Exploration Geophysicists. All rights reserved. Publis The Society of Exploration Geophysicists MT EMAP Data Interchange Standard draft was presented to the SEG Technical Standards Committee in November 1986 and copies were circulated to various reviewers. Also during this time, a FORTRAN program for reading and writing data in the standard format was implemented. This proved to be very valuable in uncovering discrepancies, i The Society of Exploration Geophysicists MT EMAP Data Interchange Standardnconsistencies, and implementation problems prior to adoption of the standard.In August 1987, a meeting of the ad hoc committee was held to resolve thThe Society of Exploration Geophysicists MT EMAP Data Interchange Standard
e remaining issues and approve a final draft. The resulting draft was forwarded to Mr Ben Thigpen, chairman of the SEG Technical standards Committee, The Society of Exploration GeophysicistsMT/EMAPData Interchange standard„ 1989. 1991 Society of Exploration Geophysicists. All rights reserved. Publis The Society of Exploration Geophysicists MT EMAP Data Interchange Standard was presented to the SEG Executive committee and was adopted on December 14,1987.I would especially like to recognize Richard Sigal of Amoco and Truman Holcombe of standard Oil for being major contributors to the MT data standard project. Although many people conưibuted to this data standard. I wou The Society of Exploration Geophysicists MT EMAP Data Interchange Standardld like to thank the following persons for providing valuable comments and criticisms which shaped this document: Karen Christopherson and Ransom ReddThe Society of Exploration Geophysicists MT EMAP Data Interchange Standard
ig of Standard Oil. Dwight Eggers of Arco. Michael Rudder of Exxon. Bob Anderson of Phoenix Geoscience. Arnold Orange of Emerald Exploration, and FranThe Society of Exploration GeophysicistsMT/EMAPData Interchange standard„ 1989. 1991 Society of Exploration Geophysicists. All rights reserved. Publis The Society of Exploration Geophysicists MT EMAP Data Interchange Standardandard. This document, published in October 1991, is the result of that effort It IS hopefully a clearer, easier to use description of the original standard. There have been no changes to the actual standard from the original description published in December 1987. There have, however, been changes The Society of Exploration Geophysicists MT EMAP Data Interchange Standardin the description designed to make the the standard easier to use:1A table of contents has been added, formatting has been improved, and typographicaThe Society of Exploration Geophysicists MT EMAP Data Interchange Standard
l errors have been corrected.2Typical examples (clearly labeled and enclosed in boxes) have been added to each block description. Complete EDI exampleThe Society of Exploration GeophysicistsMT/EMAPData Interchange standard„ 1989. 1991 Society of Exploration Geophysicists. All rights reserved. Publis The Society of Exploration Geophysicists MT EMAP Data Interchange Standardnot part of the official standard, they offer recommendations and suggestions regarding use and implementation of the standard.David WightWSE Associates. Inc.5808 Balcones, Drive Suite 202Austin. Texas 78731 USAOctober, 1991https://khothuvien.cori!1.0 INTRODUCTIONThis a description of the proposed d The Society of Exploration Geophysicists MT EMAP Data Interchange Standardata format for electrical geophysical data approved at a recent meeting of representatives from several major oil companies who contract for magnetoteThe Society of Exploration Geophysicists MT EMAP Data Interchange Standard
lluric (MT) and electromagnetic array profiling (EMAP) data Its primary purpose is to facilitate data exchange from contractors to clients and among cThe Society of Exploration GeophysicistsMT/EMAPData Interchange standard„ 1989. 1991 Society of Exploration Geophysicists. All rights reserved. Publis The Society of Exploration Geophysicists MT EMAP Data Interchange Standard different field measurement configurations and processing requirements which might arise from special applications or new developments. Although very similar in appearance to some existing formats, it has been slightly modified to be more consistent, unambiguous, extensible, and realizable A number The Society of Exploration Geophysicists MT EMAP Data Interchange Standard of refinements have been incorporated as a result of actually implementing the standard.The format can accommodate any currently used data acquisitioThe Society of Exploration Geophysicists MT EMAP Data Interchange Standard
n configuration, and has the flexibility to handle any reasonable future configuration. Supported configurations include single and multistation MT. tThe Society of Exploration GeophysicistsMT/EMAPData Interchange standard„ 1989. 1991 Society of Exploration Geophysicists. All rights reserved. Publis The Society of Exploration Geophysicists MT EMAP Data Interchange Standardels of acquisition and processing including time series, power spectra, impedance, and computed parameters including non-standard parameters. The data interchange file is always an ASCII file. However, a provision has been made to store actual data values in a parallel binary data file and reference The Society of Exploration Geophysicists MT EMAP Data Interchange Standard them through the (ASCII) data interchange file.A standard file for the interchange of data from MT. EMAP. or similar electrical geophysical techniqueThe Society of Exploration Geophysicists MT EMAP Data Interchange Standard
s is called an Electrical Data Interchange (EDI) file.2.0 PURPOSE AND SCOPEThis document addresses three separate areas:-1The physical format and mediThe Society of Exploration GeophysicistsMT/EMAPData Interchange standard„ 1989. 1991 Society of Exploration Geophysicists. All rights reserved. Publis The Society of Exploration Geophysicists MT EMAP Data Interchange Standarde.The first area defines the physical format and media on which data interchange files may reside. Although the only media currently specified by the standard is magnetic tape, there are discussions of the use of non-standard media and data communication channels for data interchange.Although the sy The Society of Exploration Geophysicists MT EMAP Data Interchange Standardntax and semantics define the set of characters and bytes which comprise die data, they do not, for example, define the units for power spectra or theThe Society of Exploration Geophysicists MT EMAP Data Interchange Standard
quadrants for apparent resistivity phase. The use of a unique data block name for each defined data type assures no misunderstandings as to the meaniThe Society of Exploration GeophysicistsMT/EMAPData Interchange standard„ 1989. 1991 Society of Exploration Geophysicists. All rights reserved. Publis The Society of Exploration Geophysicists MT EMAP Data Interchange Standard and semantics of an electrical data interchange (EDI) file are completely specified by this document in the same way that a computer language is specified by its manual. In fact, a data interchange file may be thought of as a program written in a "data interchange programming language" as defined i The Society of Exploration Geophysicists MT EMAP Data Interchange Standardn this document. A program which reads data interchange files and converts the data into a usable form is very analogous to a compiler.October 27. 198The Society of Exploration Geophysicists MT EMAP Data Interchange Standard
7MT / EMAP Data Interchange StandardThe Society of Exploration GeophysicistsMT/EMAPData Interchange standard„ 1989. 1991 Society of Exploration Geophysicists. All rights reserved. PublisThe Society of Exploration GeophysicistsMT/EMAPData Interchange standard„ 1989. 1991 Society of Exploration Geophysicists. All rights reserved. PublisGọi ngay
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