File:The Earth beneath the sea - History (1963) (20937503469).jpg

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Title: The Earth beneath the sea : History
Identifier: earthbeneathseah00hill (find matches)
Year: 1963 (1960s)
Authors: Hill, M. N. (Maurice Neville), 1919-
Subjects: Ocean bottom; Marine geophysics
Publisher: New York : Interscience Pub.
Contributing Library: MBLWHOI Library
Digitizing Sponsor: MBLWHOI Library

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148 WORZEL, AND HARRISON (chap. 9 extensively used in the open ocean with a success that may be gauged from Fig. 10, which shows a survey in the Pacific Ocean off Southern CaHfornia. E. Airborne Gravity Measurements Tlie method of reading the LaCoste-Romberg gravity meter, in which the couple on the beam is computed from the full equation of motion (see 2-D), allows gravity measurements to be taken extremely rapidly. Aircraft flying in quiet air are much steadier than a surface ship of moderate size under normal
Text Appearing After Image:
Fig. 10. Gravity survey of continental borderland of Southern California. sea conditions, so that accurate gravity measurements are possible. The chief difficulty with airborne measurements is that corrections for the speed of the airplane are very large and must, therefore, be determined with great accuracy. Even a slow airplane is moving very quickly compared with a surface ship and therefore covers a considerable distance during an averaging time suitable for use on ships. For instance, a plane travelling at 180 mph covers 36 miles in the 12-min averaging time found convenient for shipboard measurements. While this averaging time can be reduced considerably, it is clear that airborne surveys cannot yield great detail. On the other hand, for geodetic and some geophysical purposes, measurements averaged over, say, 10 miles would be quite adequate. The measurements could be made at a height of, say, 20,000 ft, which means that it would be possible to map gravity over practically the

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Flickr tags
InfoField
  • bookid:earthbeneathseah00hill
  • bookyear:1963
  • bookdecade:1960
  • bookcentury:1900
  • bookauthor:Hill_M_N_Maurice_Neville_1919_
  • booksubject:Ocean_bottom
  • booksubject:Marine_geophysics
  • bookpublisher:New_York_Interscience_Pub_
  • bookcontributor:MBLWHOI_Library
  • booksponsor:MBLWHOI_Library
  • bookleafnumber:168
  • bookcollection:biodiversity
  • bookcollection:MBLWHOI
  • bookcollection:blc
  • bookcollection:americana
  • BHL Collection
  • BHL Consortium
Flickr posted date
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4 September 2015



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current15:08, 23 September 2015Thumbnail for version as of 15:08, 23 September 20151,958 × 1,328 (378 KB)Fæ (talk | contribs)== {{int:filedesc}} == {{information |description={{en|1=<br> '''Title''': The Earth beneath the sea : History<br> '''Identifier''': earthbeneathseah00hill ([https://commons.wikimedia.org/w/index.php?title=Special%3ASearch&profile=default&fulltext=Sear...

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