排序方式： 共有18条查询结果，搜索用时 15 毫秒
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Oceanology - The data assimilation (DA) of satellite observations of the ocean level from the Archiving Validating and Interpolating Satellite Observations (AVISO) into the IWM model (G.I. Marchuk... 相似文献
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St. Mueller J. Ansorge N. Sierro P. Finckh D. Emter 《Geophysical Journal International》1987,89(1):345-352
Summary. The structure of the upper lithosphere beneath southern Germany, northern Switzerland and west-central Utah (U.S.A.) has been investigated in detail by various geophysical methods. A synoptic interpretation of travel time and amplitude data obtained in seismic refraction and wide-angle reflection surveys, combined with near-normal incidence reflection observations, now permits the elucidation of the fine structure in a more quantitative and unified manner. With this scheme it is possible to unambiguously identify low-velocity zones and to deduce velocity gradients if reliable amplitude information is included in the inversion process. 相似文献
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J. Mechie C. Prodehl K. Fuchs W. Kaminski J. Flick A. Hirn J. Ansorge R. King 《Tectonophysics》1982,90(1-2)
This paper presents some data and results from a seismic refraction experiment, completed mainly in 1979 in the Rhenish Massif, Federal Republic of Germany and extending through Luxembourg and Belgium into the Paris Basin in France.Velocity-depth functions have been derived for each record section independently, based on the assumption that velocity varies only with depth: these models are being improved upon by time-term and ray-tracing methods capable of handling laterally varying velocity structures and by calculating synthetic seismograms.The Pg phase which is observed very clearly on all record sections represents a refracted wave, with velocity generally > 6 km/s, from depths below 1.5–5.5 km. Along the 600 km long main profile one intracrustal reflection can usually be recognized, while from the three shorter crossing profiles in the massif two intracrustal reflectors can always be seen. Beneath much of the main profile the crust-mantle boundary is either a first order discontinuity or thin (< 1 km) transition zone at ~30 km depth. However, beneath the Ardennes and West Eifel there is a 6–12 km thick transition zone before a velocity of 8.1 km/s is reached at ~36 km depth. Beneath the crossing profiles, there is generally a transition zone < 3 km thick between crust and mantle. In some cases, there can be recognized at the top of the mantle a thin high velocity layer which is underlain by a low velocity layer which, in turn, is underlain by a reflector 4–11 km below the crust-mantle boundary. 相似文献
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K. G. Strassmeier K. Agabi L. Agnoletto A. Allan M. I. Andersen W. Ansorge F. Bortoletto R. Briguglio J.‐T. Buey S. Castellini V. Coud du Foresto L. Dam H. J. Deeg C. Eiroa G. Durand D. Fappani M. Frezzotti T. Granzer A. Grschke H. J. Krcher R. Lenzen A. Mancini C. Montanari A. Mora A. Pierre O. Pirnay F. Roncella F.‐X. Schmider I. Steele J. W. V. Storey N. F. H. Tothill T. Travouillon L. Vittuari M. Weber 《Astronomische Nachrichten》2007,328(6):451-474
This article reviews the situation for robotization of telescopes and instruments at the Antarctic station Concordia on Dome C. A brain‐storming meeting was held in Tenerife in March 2007 from which this review emerged.We describe and summarize the challenges for night‐time operations of various astronomical experiments at conditions “between Earth and Space” and conclude that robotization is likely a prerequisite for continuous astronomical data taking during the 2000‐hour night at Dome C. (© 2007 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim) 相似文献
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