Error in IOAPI-3.2 coordinate transform routines

I/O API
1

Hi,

I’m using IOAPI-3.2 to manipulate CMAQ results and other data.

And I got an issue when I used coordinate transform routines ’ LAMBERT()’

I wanted to transform Transverse Mercator ™ coordinate to longitude-latitude.

So, I made fortran scripts as below:

  include 'PARMS3.EXT'
  include 'FDESC3.EXT'
  include 'IODECL3.EXT'

  character(len=16)            :: gname
  real                         :: a,b,c,xc,yc,x,y
  real                         :: u,v
  logical                      :: trmerc,trm2ll,trm2lam

  call grid_info(gname)
  if(.not.trmerc(gname,a,b,c,xc,yc)) then
     write(6,*) 'error'
  endif

  x = 197.783 ; y = 453.032
  if(.not.trm2ll(x,y,u,v)) then
     write(6,*) 'error2'
  endif

  write(6,'(a,f8.1,2x,e12.5,3f8.1/)')'a,b,c,x,y',a,b,c,xc,yc
  write(6,*) 'input x =',x,'input y=',y
  write(6,*) 'output x=',u,'output y=',v

  end

However, I got an error message like this:

0ERROR PI09Z0
LATITUDE FAILED TO CONVERGE AFTER  6 ITERATIONS

 >>--->> WARNING in subroutine LAMBERT/TRM2LL
 Projection-specific error

 a,b,c,x,y    38.0   0.10000E+01   127.0   127.0    38.0

 input x =   197.7830     input y=   453.0320
 output x=  0.0000000E+00 output y=  0.0000000E+00

I tried this several times and to find any problem in IOAPI Lambert.f, but I couldn’t any problem.

I want to know why I got this error and how to solve it.

I hope any ideas about this issue.

Thank you.

HyeonYeong Park