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ctl_str.f90
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ctl_str.f90
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MODULE ctl_str
!---------------------------------------------------------------------------
! !
! Copyright 2018 Anna Teruzzi, OGS, Trieste !
! !
! This file is part of 3DVarBio.
! 3DVarBio is based on OceanVar (Dobricic, 2006) !
! !
! 3DVarBio is free software: you can redistribute it and/or modify. !
! it under the terms of the GNU General Public License as published by !
! the Free Software Foundation, either version 3 of the License, or !
! (at your option) any later version. !
! !
! 3DVarBio is distributed in the hope that it will be useful, !
! but WITHOUT ANY WARRANTY; without even the implied warranty of !
! MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the !
! GNU General Public License for more details. !
! !
! You should have received a copy of the GNU General Public License !
! along with OceanVar. If not, see <http://www.gnu.org/licenses/>. !
! !
!---------------------------------------------------------------------------
!-----------------------------------------------------------------------
! !
! Cost function, control vector and optimisation arrays !
! !
! Version 1: A. Teruzzi 2018 !
!-----------------------------------------------------------------------
use set_knd
implicit none
public
! ---
! Structure for lbfgs
TYPE lbfgs_t
INTEGER(i4) :: n ! size of the optimisation vector
REAL(r8) :: f_b ! The background cost function
REAL(r8) :: f_o ! The observational cost function
real(r8) :: f_c, factr ! The cost function, accuracy
real(r8) :: pgtol, pgper ! Stopping criteria, percentage of initial gradient
real(r8), POINTER :: x_c(:) ! The control vector (background - analyses)
real(r8), POINTER :: g_c(:) ! The gradient of f_c
INTEGER(i4) :: n_global ! global size of the optimization vector (n is the local size)
END TYPE lbfgs_t
TYPE (lbfgs_t) :: ctl
END MODULE ctl_str