The reduction of aliasing in gravity anomalies and geoid heights using digital terrain data (Record no. 44150)

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fixed length control field 02335nam a2200241Ia 4500
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control field MX-MdCICY
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control field 20250625140621.0
040 ## - CATALOGING SOURCE
Transcribing agency CICY
090 ## - LOCALLY ASSIGNED LC-TYPE CALL NUMBER (OCLC); LOCAL CALL NUMBER (RLIN)
Classification number (OCLC) (R) ; Classification number, CALL (RLIN) (NR) B-9907
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245 10 - TITLE STATEMENT
Title The reduction of aliasing in gravity anomalies and geoid heights using digital terrain data
490 0# - SERIES STATEMENT
Volume/sequential designation Geophys. J. Int., 141, p.204-212, 2000
520 3# - SUMMARY, ETC.
Summary, etc. Observations of gravity can be aliased by virtue of the logistics involved in collecting these data in the field. For instance, gravity measurements are often made in more accessible lowland areas where there are roads and tracks, thus omitting areas of higher relief in between. The gravimetric determination of the geoid requires mean terraincorrected free-air anomalies; however, anomalies based only on the observations in lowland regions are not necessarily representative of the true mean value over the topography. A five-stage approach is taken that uses a digital elevation model, which provides a more accurate representation of the topography than the gravity observation elevations, to reduce the unrepresentative sampling in the gravity observations. When using this approach with the Australian digital elevation model, the terrain-corrected free-air anomalies generated from the Australian gravity data base change by between 77.075 and -84.335 mgal (-0.193 mgal mean and 2.687 mgal standard deviation). Subsequent gravimetric geoid computations are used to illustrate the effect of aliasing in the Australian gravity data upon the geoid. The difference between 'aliased' and 'non-aliased' gravimetric geoid solutions varies by between 0.732 and -1.816 m (-0.058 m mean and 0.122 m standard deviation). Based on these conceptual arguments and numerical results, it is recommended that supplementary digital elevation information be included during the estimation of mean gravity anomalies prior to the computation of a gravimetric geoid model
650 14 - SUBJECT ADDED ENTRY--TOPICAL TERM
Topical term or geographic name entry element ALIASING
650 14 - SUBJECT ADDED ENTRY--TOPICAL TERM
Topical term or geographic name entry element AUSTRALIA
650 14 - SUBJECT ADDED ENTRY--TOPICAL TERM
Topical term or geographic name entry element DIGITAL TERRAIN MODELS
650 14 - SUBJECT ADDED ENTRY--TOPICAL TERM
Topical term or geographic name entry element GEOID
650 14 - SUBJECT ADDED ENTRY--TOPICAL TERM
Topical term or geographic name entry element GRAVITY
700 12 - ADDED ENTRY--PERSONAL NAME
Personal name Featherstone, W. E.
700 12 - ADDED ENTRY--PERSONAL NAME
Personal name Kirby, J. F.
856 40 - ELECTRONIC LOCATION AND ACCESS
Uniform Resource Identifier <a href="https://drive.google.com/file/d/1oaQ0GWX00iQLVY60wz0MZ3TYKouV6oYn/view?usp=drivesdk">https://drive.google.com/file/d/1oaQ0GWX00iQLVY60wz0MZ3TYKouV6oYn/view?usp=drivesdk</a>
Public note Para ver el documento ingresa a Google con tu cuenta: @cicy.edu.mx
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Source of classification or shelving scheme Clasificación local
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  Clasificación local     Ref1 CICY CICY Documento préstamo interbibliotecario 25.06.2025   B-9907 25.06.2025 25.06.2025 Documentos solicitados