Free non-commercial academic research ONLY.

!=====================================================================
!
!       m e m b r a n e S p h e r e  1 . 0
!       --------------------------------------------------
!
!      Daniel Peter
!      ETH Zurich - Institute of Geophysics
!      (c) ETH July 2006
!
!      Free for non-commercial academic research ONLY.
!      This program is distributed WITHOUT ANY WARRANTY whatsoever.
!      
!=====================================================================
!
! Copyright July 2006, by the ETH Zurich.
!
! The software shall be used for scientific purposes only, excluding industrial or commercial 
! purposes.
!
! The software is furnished on an "as is" basis and the copyright holder in no way warrants 
! the software or any of its results and is in no way liable for any use made of the software.  
! The copyright holder disclaims all warranties, representations, and statements, express or 
! implied, statutory or otherwise, including, without limitation, any implied warranties of 
! merchantability or fitness for a particular purpose. In no event shall the copyright holder be 
! liable for any actual, direct, indirect, special, consequential, or incidental damages, however 
! caused, including, without limitation, any damages arising out of the use or operation of 
! the software, loss of use of the software, or damage of any sort to the user.
!
! If you use this code for your own research, please send an email
! to Daniel Peter <dpeter@erdw.ethz.ch> for information.
!
! Proper acknowledgement shall be made to the authors of the software in publications and 
! presentations resulting from the use of this software:
!
! Peter, D., C. Tape, L. Boschi and J. H. Woodhouse, 2007. Surface wave tomography: 
! global membrane waves and adjoint methods, Geophys. J. Int., , 171: p. 1098-1117.
!
! Tape, C. H., 2003. Waves on a Spherical Membrane, M.Sc. thesis, University of Oxford, U.K.