نتایج جستجو برای: satellite wave propagation

تعداد نتایج: 383111  

Journal: :computational methods in civil engineering 2011
a.m. kaynia

a frequency-wavenumber-domain formulation is presented in this paper for calculation of the green's functions and wave propagation modes in a stratified fluid body underlain by a layered viscoelastic soil medium. the green's functions define the solid and fluid displacements and fluid pressures due to uniform disk loads acting in either the soil or fluid media. the solution is in the frequency ...

In this paper, the wave propagation method is combined with nonlocal elasticity theory to analyze the buckling and free vibration of rectangular Reddy nanoplate. Wave propagation is one of the powerful methods for analyzing the vibration and buckling of structures. It is assumed that the plate has two opposite edges simply supported while the other two edges may be simply supported or clamped. ...

Journal: :journal of solid mechanics 0
p.k vaishnav department of applied mathematics, indian school of mines, dhanbad-826004, india s kundu department of applied mathematics, indian school of mines, dhanbad-826004, india s.m abo-dahab department, qena faculty of science, egypt a saha department of applied mathematics, indian school of mines, dhanbad-826004, india

the present paper studies the possibility of propagation of torsional surface waves in an inhomogeneous anisotropic layer lying between two heterogeneous half-spaces (upper and lower half-space). both the half-spaces are assumed to be under compressive initial stress. the study reveals that under the assumed conditions, a torsional surface wave propagates in the medium. the dispersion relation ...

2003
Guenther Abwerzger

Although satellite navigation, mainly based on the U.S. GPS, plays an important role in positioning and navigation tasks and although there are efforts to establish new satellite-based navigation systems like the European Galileo, the reliability and availability of these systems cannot satisfy all requirements of today’s navigation. Therefore, the navigation system of the future will likely co...

The present investigation deals with the propagation of waves in a micropolar transversely isotropic layer. Secular equations for symmetric and skew-symmetric modes of wave propagation in completely separate terms are derived. The amplitudes of displacements and microrotation were also obtained. Finally, the numerical solution was carried out for aluminium epoxy material and the dispersion curv...

Massah, H.R., Momeni-Masuleh, S.H., Setvati-Zirak, A.,

Investigating waves propagation’s equation in the atmosphere is one of the important and widely used issues in various sciences, which has attracted many researchers. A type of propagating waves is an acoustic-gravity wave. These type of waves have a lot of stationarity properties and can be propagate to a high altitude in the atmosphere. The equation of acoustic-gravity wave propagation is a h...

2007
J. Bortnik R. M. Thorne N. P. Meredith

[1] In the present paper, phase space density functions of the form f (v) = AN/v n are fitted to statistical distributions of suprathermal electron fluxes (E = 0.213–16.5 keV) from the CRRES satellite, parameterized by L-shell, Magnetic Local Time (MLT), and geomagnetic activity. The fitted distributions are used in conjunction with ray tracing to calculate the Landau damping rates of an ensemb...

2007
John L. Wilkin Weifeng G. Zhang

[1] Mesoscale variability where the East Australian Current (EAC) separates from the coast is studied using sea surface temperature and surface velocity streamfunction observed by satellite and a regional numerical model. The mean circulation simulated by the model (the Regional Ocean Modeling System (ROMS)) is compared to a high-resolution regional climatology, and the realism of the simulated...

2002
Louis J. Ippolito Julie Feil

pertinent to the prospective atmospheric propagation effects Satellite Propagation in the 20to 30GHz Frequency Range, IEEE Trans. Ant. Prop. Ippo1ito, L. J., R. D. Kau1 , and R. G. Na11ace, Propagation Handbook for Sate11ite. Systems Design, A Summary of Propagation Impairments on 10 to 100 GHz Sate11ite. DESCANSO NASA Propagation Program. Propagation Effects Handbook for Satellite Systems Desi...

2015
Bingqing Liu Hong Yang Xianwen Ding Xiaofeng Li

The propagation of internal solitary waves (ISWs) in the South China Sea (SCS) was tracked using National Aeronautics and Space Administration (NASA) Moderate Resolution Imaging Spectroradiometer (MODIS) and the Visible Infrared Imaging Radiometer Suite (VIIRS) sun glint image pairs. The acquisition times of the two images comprising the same pair is usually separated by about 2 hours. Four pai...

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