Surface-wave group-delay and attenuation kernels
نویسندگان
چکیده
منابع مشابه
Surface-wave group-delay and attenuation kernels
S U M M A R Y We derive both 3-D and 2-D Fréchet sensitivity kernels for surface-wave group-delay and anelastic attenuation measurements. A finite-frequency group-delay exhibits 2-D off-ray sensitivity either to the local phase-velocity perturbation δc/c or to its dispersion ω(∂/∂ω)(δc/c) as well as to the local group-velocity perturbation δC/C . This dual dependence makes the raytheoretical in...
متن کاملSwitched-Current Wave Group Delay Equalizers
To improve the elliptic filters step response, group delay equalizers are often cascaded with the filters. This paper describes the design of switched-current (SI) group delay equalizer using wave synthesis technique. This design is based on a new all-pass circuit, where the poles are generated using wave structures. Simulation results are included demonstrating that the 3 rd-order SI group del...
متن کاملMultimode surface wave sensitivity kernels in radially anisotropic earth media
S U M M A R Y I calculate three-dimensional (3-D) sensitivity kernels of multimode surface wave observables in radially anisotropic earth media for perturbations in wave speeds αH, αV, βH, βV and η as well as in density ρ. The 3-D phase-delay and amplitude kernels are formulated based upon Born approximation in the framework of surface wave mode summation, fully accounting for cross-branch mode...
متن کاملDevelopment of Surface Wave Dispersion and Attenuation Maps and Improved Methods for Measuring Surface Waves
The objective of this project is to optimize the measurement of surface waves, particularly at regional and local distances and at periods of 8–15 seconds. One goal of this project is the development of global regionalized dispersion and attenuation maps, with a particular focus on determining attenuation maps for Eurasia in the 8–15 second period band. Both the dispersion and attenuation maps ...
متن کاملDesign of Wave Switched-Current Group Delay Equalizers
This paper describes the design of switched-current group delay equalizers. The design process is based on the pole-zero mirroring technique; with equalizer z-transfer functions generated using an optimization algorithm. To facilitate the systematic implementation of the equalizers, a model describing the design process is developed. A novel feature of the equalizers implementation is that wave...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Geophysical Journal International
سال: 2006
ISSN: 0956-540X,1365-246X
DOI: 10.1111/j.1365-246x.2006.02913.x