共查询到20条相似文献，搜索用时 31 毫秒
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Ray tracing in factorized anisotropic inhomogeneous media 总被引：1，自引：0，他引：1
V. &#;ervený 《Geophysical Journal International》1989,99(1):91-100
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Ray tracing in random media 总被引：1，自引：0，他引：1
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Geocentre motion from the DORIS space system and laser data to the Lageos satellites: comparison with surface loading data 总被引：3，自引：0，他引：3
F. Bouillé A. Cazenave J. M. Lemoine J. F. Crétaux 《Geophysical Journal International》2000,143(1):71-82
Surface mass redistribution within the Earth system, especially in the atmosphere, oceans, continents and ice sheets, causes the position of the centre of mass to vary in a reference frame attached to the solid Earth. Space techniques are now precise enough to measure the centre of mass motion. Here we present a determination of the centre of mass coordinates at regular monthly intervals using DORIS data on SPOT‐2, SPOT‐3 and Topex–Poseidon (1993–1997) and laser data on Lageos‐1 and Lageos‐2 (1993–1996). The amplitude and phase of the space‐geodesy‐derived annual cycle for each coordinate are further compared to estimates based on surface mass redistribution at the Earth surface derived from various climatic data sources: surface pressure, soil moisture, snow depth and ocean mass variations. 相似文献
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Ray perturbation theory and the Born approximation 总被引：1，自引：0，他引：1
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Interpolation of ray theory traveltimes within ray cells 总被引：1，自引：0，他引：1
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Summary. A method of comparison of exact numerical computations with an asymptotic ray series expansion consisting of the two first terms is proposed. The method makes it unnecessary to derive complicated explicit expressions for the second leading term of the ray series.
As a practical example we consider the anomalous PS arrival generated in the case of a near-vertical incidence of a spherical P wave on a solid/solid boundary. The areas in which the PS wave may be described by two leading terms of the ray series expansion are marked and deviations from the ray theory are analysed. 相似文献
As a practical example we consider the anomalous PS arrival generated in the case of a near-vertical incidence of a spherical P wave on a solid/solid boundary. The areas in which the PS wave may be described by two leading terms of the ray series expansion are marked and deviations from the ray theory are analysed. 相似文献
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