Further settings updates in scripts/exglobal_atmos_analysis.sh

- Update nsig_ext from 12 to 45
- Update dmesh(4) from 25.0 to 50.0

Refs NOAA-EMC#1494

scripts/exglobal_atmos_analysis.sh

@@ -700,7 +700,7 @@ cat > gsiparm.anl << EOF
   iguess=-1,
   tzr_qc=${TZR_QC},
   oneobtest=.false.,retrieval=.false.,l_foto=.false.,
-  use_pbl=.false.,use_compress=.true.,nsig_ext=12,gpstop=50.,commgpstop=45.,commgpserrinf=1.0,
+  use_pbl=.false.,use_compress=.true.,nsig_ext=45,gpstop=50.,commgpstop=45.,commgpserrinf=1.0,
   use_gfs_nemsio=.false.,use_gfs_ncio=.true.,sfcnst_comb=.true.,
   use_readin_anl_sfcmask=${USE_READIN_ANL_SFCMASK},
   lrun_subdirs=${lrun_subdirs},
@@ -753,7 +753,7 @@ cat > gsiparm.anl << EOF
   ${OBSQC}
 /
 &OBS_INPUT
-  dmesh(1)=145.0,dmesh(2)=150.0,dmesh(3)=100.0,dmesh(4)=25.0,time_window_max=3.0,
+  dmesh(1)=145.0,dmesh(2)=150.0,dmesh(3)=100.0,dmesh(4)=50.0,time_window_max=3.0,
   ${OBSINPUT}
 /
 OBS_INPUT::