| 1 |
program hadley3 |
| 2 |
|
| 3 |
c*** This subroutine calculates analysis errors using greg's |
| 4 |
c*** ensemble square root filter, or the traditional ensemble |
| 5 |
c*** kalman filter. |
| 6 |
c*** |
| 7 |
c*** Written by: Sai Ravela |
| 8 |
c*** Last modified: Feb 2, 2003 |
| 9 |
|
| 10 |
implicit none |
| 11 |
|
| 12 |
integer i, j, k, n, ijim, ijuli, isteps, nens, ics |
| 13 |
integer nx, ny, nz, nf, nnx, nny, nnz, mobs, isai |
| 14 |
integer ii, jj, zob, xob, yob |
| 15 |
#include "hadley3.h" |
| 16 |
integer iobsloc(mobs), indxa |
| 17 |
real*8 ytrue(n), yobs(mobs), ytmp(n) |
| 18 |
real*8 pert(n), R(mobs), yobsfull(n), ave(n), var(n) |
| 19 |
real*8 xens(n,nens) |
| 20 |
real*8 var_obs, eps, dt, x |
| 21 |
real*8 obserr, analerr, distsub, distobs |
| 22 |
integer iret, system |
| 23 |
real*4 mask(ny,nx) |
| 24 |
|
| 25 |
c*** open some output files |
| 26 |
open(unit=2,file='test.dat',status='unknown') |
| 27 |
c open(unit=3,file='fields.dat',status='unknown') |
| 28 |
|
| 29 |
c*** initialisations |
| 30 |
eps=0.005 ! obs error - 1/2 mm/s |
| 31 |
isteps=1 ! number of steps per obs cycle |
| 32 |
|
| 33 |
c*** Here is where you read iobsloc and corresponding |
| 34 |
c variances. You should know |
| 35 |
c mobs in advance...in hadley |
| 36 |
|
| 37 |
call ReadObs(3,mobs,iobsloc) |
| 38 |
write (*,*) 'iobsloc set',mobs, iobsloc(mobs), nens |
| 39 |
var_obs=eps**2 |
| 40 |
do i=1,mobs |
| 41 |
if (iobsloc(i) < nx*ny*nz*3) then |
| 42 |
R(i)=var_obs |
| 43 |
else |
| 44 |
R(i) = 0.1 ! 0.9 deg other |
| 45 |
end if |
| 46 |
enddo |
| 47 |
|
| 48 |
|
| 49 |
c*** loop over initial conditions |
| 50 |
do ijim=1,ics |
| 51 |
|
| 52 |
call ReadPickup(0,n,nx,ny,nz,ytrue) |
| 53 |
write (*,*) 'Picked Truth' |
| 54 |
do k = 1,mobs |
| 55 |
indxa = iobsloc(k) |
| 56 |
yobs(k) = ytrue(indxa) |
| 57 |
end do |
| 58 |
do isai=1,nens |
| 59 |
call ReadPickUp(isai,n,nx,ny,nz,ytmp) |
| 60 |
do k=1,n |
| 61 |
xens(k,isai)=ytmp(k) |
| 62 |
enddo |
| 63 |
enddo |
| 64 |
write (*,*) 'Picked Ensemble' |
| 65 |
call EnSRF3d(xens,yobs,iobsloc,n,mobs,R,nens,nx,ny,nz,mask) |
| 66 |
c*** get ensemble mean and variance |
| 67 |
call ranmean2(xens,ave,n,nens) |
| 68 |
c*** calculate obs and anal err |
| 69 |
analerr=distobs(yobs,ave,iobsloc,mobs,n) |
| 70 |
write(6,*) ijim, analerr |
| 71 |
write(2,*) ijim, analerr |
| 72 |
analerr=distsub(ytrue,ave,n) |
| 73 |
write(6,*) '>',ijim, analerr |
| 74 |
write(2,*) '>',ijim, analerr |
| 75 |
c write(3,'(250f18.10)') (ave(i), i=1,n) |
| 76 |
|
| 77 |
|
| 78 |
c*** step truth forward |
| 79 |
call Model(0) |
| 80 |
call ReadPickup(0,n,nx,ny,nz,ytmp) |
| 81 |
call WritePickUp(0,n,nx,ny,nz,ytmp) |
| 82 |
write (*,*) 'Stepped Truth' |
| 83 |
c*** step ensemble forward |
| 84 |
do isai=1,nens |
| 85 |
do k=1,n |
| 86 |
ytmp(k)=xens(k,isai) |
| 87 |
enddo |
| 88 |
call WritePickUp(isai,n,nx,ny,nz,ytmp) |
| 89 |
call Model(isai) |
| 90 |
enddo |
| 91 |
write (*,*) 'Stepped Ensemble' |
| 92 |
call flush() |
| 93 |
|
| 94 |
enddo |
| 95 |
|
| 96 |
return |
| 97 |
end |
| 98 |
|
Parent Directory
| 
Revision Log
| 
Revision Graph