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read in dx/dy instead of calculating them #523

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Merged
WenMeng-NOAA merged 3 commits into from
Jun 16, 2022
Merged

read in dx/dy instead of calculating them #523

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8ad7af0
read in dx/dy instead of caculating them
LinZhu-NOAA Jun 15, 2022
335a638
add the change log for dxdy code change
LinZhu-NOAA Jun 16, 2022
a0d9145
change 2011 to 2022 in the change log
LinZhu-NOAA Jun 16, 2022
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7 changes: 5 additions & 2 deletions sorc/ncep_post.fd/grib2_module.f
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Original file line number Diff line number Diff line change
Expand Up @@ -11,6 +11,7 @@ module grib2_module
! March, 2015 Lin Gan Replace XML file with flat file implementation
! with parameter marshalling
! July, 2021 Jesse Meng 2D decomsition
! June, 2022 Lin Zhu change the dx/dy to reading in from calculating for latlon grid
!------------------------------------------------------------------------
use xml_perl_data, only: param_t,paramset_t
!
Expand Down Expand Up @@ -1779,13 +1780,15 @@ subroutine getgds(ldfgrd,len3,ifield3len,igds,ifield3)
ifield3(15) = latlast
ifield3(16) = lonlast
! ifield3(17) = NINT(360./(IM)*1.0E6)
ifield3(17) = abs(lonlast-lonstart)/(IM-1)
! ifield3(17) = abs(lonlast-lonstart)/(IM-1)
ifield3(17) = DXVAL
! if(mod(jm,2) == 0 ) then
! ifield3(18) = NINT(180./JM*1.0E6)
! else
! ifield3(18) = NINT(180./(JM-1)*1.0E6)
ifield3(18) = abs(latlast-latstart)/(JM-1)
! ifield3(18) = abs(latlast-latstart)/(JM-1)
! endif
ifield3(18) = DYVAL
if( latstart < latlast ) then
ifield3(19) = 64 !for SN scan
else
Expand Down