Text this

Number:

Provider:

CAPTCHA:

 _    _     ______    _  _      ___     _____    
| |  | ||  /_   _//  | \| ||   / _ \\  |  __ \\  
| |/\| ||   -| ||-   |  ' ||  / //\ \\ | |  \ || 
|  /\  ||   _| ||_   | .  || |  ___  ||| |__/ || 
|_// \_||  /_____//  |_|\_|| |_||  |_|||_____//  
`-`   `-`  `-----`   `-` -`  `-`   `-`  -----`

Please enter what you see:

Text this: Ground roll attenuation using SVD and time-frequency-wavenumber filters