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C $Header: /u/gcmpack/MITgcm/pkg/ecco/cost_geoid.F,v 1.8 2014/10/18 18:15:44 gforget Exp $ |
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C $Name: $ |
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|
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#include "ECCO_OPTIONS.h" |
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|
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subroutine cost_geoid( |
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O sphcost, |
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I shc, |
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I mythid |
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& ) |
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|
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c ================================================================== |
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c SUBROUTINE cost_geoid |
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c ================================================================== |
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c |
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c o Evaluate the cost function of the geoid contribution. |
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c |
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c started: Christian Eckert eckert@mit.edu 30-Jun-1999 |
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c |
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c changed: Christian Eckert eckert@mit.edu 25-Feb-2000 |
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c - Restructured the code in order to create a package |
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c for the MITgcmUV. |
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c |
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c changed: Ralf Giering Ralf.Giering@FastOpt.de 12-Jun-2001 |
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c - totally rewrite for parallel processing |
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c |
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c heimbach@mit.edu 05-May-2005 |
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c - debugged and restructuted |
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c |
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c ================================================================== |
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c SUBROUTINE cost_geoid |
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c ================================================================== |
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|
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implicit none |
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c == global variables == |
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|
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#ifdef ALLOW_EGM96_ERROR_COV |
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#include "EEPARAMS.h" |
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#include "SIZE.h" |
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#include "PARAMS.h" |
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|
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#include "ecco_cost.h" |
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#ifdef ALLOW_SPHERE |
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# include "sphere.h" |
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#else |
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integer ncShc |
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parameter (ncShc=1) |
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#endif |
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#else |
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integer ncShc |
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parameter (ncShc=1) |
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#endif |
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|
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c == routine arguments == |
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|
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_RL sphcost |
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_RL shc( ncShc ) |
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integer mythid |
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#ifdef ALLOW_EGM96_ERROR_COV |
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c == local variables == |
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Real*8 pinv( ncshc ) |
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|
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integer i,j |
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integer ilo,ihi |
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integer ireads |
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integer egmsize |
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parameter( egmsize = 8 ) |
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|
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integer jsize, joff, jbeg, jend |
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integer reclength |
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|
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_RL factor |
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_RL recip_rr |
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c == end of interface == |
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c-- Only the master thread is doing I/O |
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_BEGIN_MASTER( mythid ) |
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|
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c-- initialise cost variable for all threads |
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c-- to allow usage of global_sum_r8 |
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sphcost = 0. _d 0 |
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do i=1,ncShc |
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pinv(i) = 0. _d 0 |
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enddo |
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c-- Initialise variables. |
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recip_rr = recip_rsphere*recip_rsphere |
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|
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c-- round up the quotient to get jsize |
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jsize = ncshc / numberOfProcs |
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if (jsize*numberOfProcs .lt. ncshc ) then |
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jsize = jsize + 1 |
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end if |
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|
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c-- compute sub-intervall of 1..ncshc for this processor |
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joff = myProcId*jsize |
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jbeg = 1 + joff |
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jend = min( ncshc, joff+jsize ) |
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reclength = ncshc*egmsize |
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|
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c-- read part of geoid error covariance matrix |
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c-- and compute corresponding part of cost contribution |
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CADJ loop = parallel |
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do j = jbeg,jend |
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|
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call cost_readgeoid( |
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I geoid_covariancefile, reclength, j, |
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O pinv, |
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I mythid ) |
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factor = 0. |
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do i = 1,ncShc |
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factor = factor + pinv(i)*shc(i)*recip_rr |
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enddo |
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sphcost = sphcost + factor*shc(j) |
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enddo |
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_END_MASTER( mythid ) |
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_GLOBAL_SUM_RL( sphcost, mythid ) |
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#endif /* ALLOW_EGM96_ERROR_COV */ |
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end |
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