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1. |
Modern Geodetic Earth Reference Models |
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Eos, Transactions American Geophysical Union,
Volume 62,
Issue 7,
1981,
Page 65-67
Bernard H. Chovitz,
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摘要:
A geodetic earth reference model is defined as a self‐gravitating body of given mass and rotational rate whose surface is an equipotential ellipsoid of revolution of specified dimensions. Over the course of this century, the International Association of Geodesy has sanctioned three such models as recommended standards for both scientific and practical applications. The most recent model was approved in December 1979, replacing one chosen in 1967, which in turn supplanted another originally adopted four decades earlier.One of the chief scientific aims of geodesy is the determination of the size and shape of the earth. Therefore, much of the energy expended by geodesists has focused on finding a model (defined by both geometrical and physical parameters) that can serve as a suitable reference surface for further geodetic and geophysical investigations. ‘Suitable’ is a flexible term. In the 19th century, it may have inferred accuracy to one part in 104. Nowadays, it signifies better than one part i
ISSN:0002-8606
DOI:10.1029/EO062i007p00065
年代:1981
数据来源: WILEY
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2. |
Gift |
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Eos, Transactions American Geophysical Union,
Volume 62,
Issue 7,
1981,
Page 66-66
C. T. Russell,
Charles A. Whitten,
Earl G. Droessler,
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PDF (124KB)
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摘要:
Something that has not been mentioned yet in the appeal for gifts to AGU is the possibility of funding a scholarship that would be administered by the AGU. To keep geophysics an alive and vital discipline, we must continue to attract the best young minds to the field. If we established a well endowed fund with sufficient resources to more than adequately fund a graduate student through 2 or possibly 3 years of graduate work, the attendant publicity and nationwide attention could do much to attract these good young minds to our field.In your talks with potential donors I urge you to keep the possibility of scholarship endowments in mind.
ISSN:0002-8606
DOI:10.1029/EO062i007p00066-01
年代:1981
数据来源: WILEY
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3. |
‘Wind farm’ producing electric power |
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Eos, Transactions American Geophysical Union,
Volume 62,
Issue 7,
1981,
Page 67-67
Peter M. Bell,
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PDF (133KB)
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摘要:
The nation's first ‘wind farm,’ featuring three of the largest advanced wind turbine systems, is nearing completion. The turbines are the seventh, eighth, and ninth wind turbines to be built under a portion of the federal wind energy program. The first of the three new machines began producing electricity for the Bonneville Power Administration at Goodnoe Hills, near Goldendale, Wash., late last year. The second machine will be fully assembled and begin to generate electricity in February. The third machine is expected to be fully assembled and running late this spr
ISSN:0002-8606
DOI:10.1029/EO062i007p00067-01
年代:1981
数据来源: WILEY
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