scholarly journals Temporal change in shear velocity and polarization anisotropy related to the 2011 M9.0 Tohoku-Oki earthquake examined using KiK-net vertical array data

2012 ◽  
Vol 39 (9) ◽  
pp. n/a-n/a ◽  
Author(s):  
Ryota Takagi ◽  
Tomomi Okada
Keyword(s):  
Temporal Change ◽  
Shear Velocity ◽  
Polarization Anisotropy ◽  
Vertical Array ◽  
Array Data

Sonar detection performance analysis with environmental uncertainty using vertical array data

2012 ◽  
Vol 131 (4) ◽  
pp. 3488-3488
Author(s):  
Xinmin Ren ◽  
Guofeng Zheng ◽  
Qihu LI ◽  
Guiqing Sun ◽  
Haining Huang ◽  
...  
Keyword(s):  
Performance Analysis ◽  
Environmental Uncertainty ◽  
Detection Performance ◽  
Vertical Array ◽  
Array Data

MAXIMUM LIKELIHOOD FILTERING OF REFLECTION SEISMOGRAPH DATA

Geophysics ◽  
1978 ◽  
Vol 43 (3) ◽  
pp. 497-513 ◽  
Author(s):  
Edward Mercado
Keyword(s):  
Maximum Likelihood ◽  
Time Window ◽  
Wiener Filter ◽  
Matrix Inversion ◽  
Vertical Array ◽  
Array Data ◽  
Common Depth Point ◽  
Inversion Techniques

Two types of adaptive multichannel filters applied to exploration reflection seismograph data are the maximum likelihood filter and the Wiener filter. Derived equations for the two types of filters demonstrate that the maximum likelihood filter equations are identical in form to the Wiener equations and are solved by the same matrix inversion techniques. Application of the maximum likelihood filter to common‐depth‐point (CDP) data demonstrates that the output reflection quality is sensitive to reflection alignment on input traces. Presently, sufficient coherency of reflections on input traces can be achieved only on CDP traces with a time window in which the reflection signal is dominant or on vertical array data for which reflection alignment is straight‐forward.

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