Reorganize NPOESS scripts (NOAA-EMC#2166)

This PR addresses issue NOAA-EMC#1226. The following is accomplished:

- Using the GEMPAK j-job script `JGFS_ATMOS_GEMPAK_PGRB2_SPEC`, the structure
of `JGFS_ATMOS_PGRB2_SPEC_NPOESS` is updated;
- Environment variables specific to the script `exgfs_atmos_grib2_special_npoess.sh`
are moved accordingly; this specifically applies to the environment variable `FHOUR`,
`SHOUR`, `FHINC`, `SLEEP_TIME`, and `SLEEP_INT`;
- The `SLEEP_TIME` and `SLEEP_INT` parameters can now be defined at the top-level 
(if necessary);
- Restart file checks are move to `exgfs_atmos_grib2_special_npoess.sh`; however,
this may not be necessary (see `TODO` note within draft PR.

Resolves NOAA-EMC#1226

jobs/JGFS_ATMOS_PGRB2_SPEC_NPOESS

@@ -10,7 +10,6 @@ source "${HOMEgfs}/ush/jjob_header.sh" -e "npoess" -c "base"
 
 export OMP_NUM_THREADS=${OMP_NUM_THREADS:-1}
 
-
 ################################
 # Set up the HOME directory
 ################################
@@ -38,47 +37,6 @@ GRID="0p50" YMD=${PDY} HH=${cyc} generate_com -rx COM_ATMOS_GRIB_0p50:COM_ATMOS_
 
 mkdir -m 775 -p "${COM_ATMOS_GOES}"
 
-# TODO - This should be in the ex-script (#1226)
-
-####################################
-# Specify Forecast Hour Range
-####################################
-export SHOUR=000
-export FHOUR=180
-export FHINC=003
-
-####################################
-# Specify Timeout Behavior of Post
-#
-# SLEEP_TIME - Amount of time to wait for
-#              a restart file before exiting
-# SLEEP_INT  - Amount of time to wait between
-#              checking for restart files
-####################################
-export SLEEP_TIME=900
-export SLEEP_INT=5
-
-####################################
-# Check if this is a restart
-####################################
-if [[ -f "${COM_ATMOS_GOES}/${RUN}.t${cyc}z.control.goessimpgrb2" ]]; then
-   modelrecvy=$(cat < "${COM_ATMOS_GOES}/${RUN}.t${cyc}z.control.goessimpgrb")
-   recvy_cyc="${modelrecvy:8:2}"
-   recvy_shour="${modelrecvy:10:13}"
-
-   if [[ ${RERUN} == "NO" ]]; then
-      NEW_SHOUR=$(( recvy_shour + FHINC ))
-      if (( NEW_SHOUR >= SHOUR )); then
-         export SHOUR=${NEW_SHOUR}
-      fi
-      if (( recvy_shour >= FHOUR )); then
-         echo "Forecast Pgrb Generation Already Completed to ${FHOUR}"
-      else
-         echo "Starting: PDY=${PDY} cycle=t${recvy_cyc}z SHOUR=${SHOUR}"
-      fi
-   fi
-fi
-
 #############################################################
 # Execute the script
 "${HOMEgfs}/scripts/exgfs_atmos_grib2_special_npoess.sh"

scripts/exgfs_atmos_grib2_special_npoess.sh

@@ -40,13 +40,52 @@ export opt26=' -set_grib_max_bits 25 -fi -if '
 export opt27=":(APCP|ACPCP|PRATE|CPRAT|DZDT):"
 export opt28=' -new_grid_interpolation budget -fi '
 
-SLEEP_LOOP_MAX=$(expr $SLEEP_TIME / $SLEEP_INT)
+####################################
+# Specify Timeout Behavior of Post
+#
+# SLEEP_TIME - Amount of time to wait for
+#              a restart file before exiting
+# SLEEP_INT  - Amount of time to wait between
+#              checking for restart files
+####################################
+export SLEEP_TIME=${SLEEP_TIME:-900}
+export SLEEP_INT=${SLEEP_TIME:-5}
+
+SLEEP_LOOP_MAX=$(( SLEEP_TIME / SLEEP_INT ))
+
+# TODO: Does this section do anything? I retained if for clarity of
+# changes/updates, but it does not appear to do anything.
+
+####################################
+# Check if this is a restart
+####################################
+if [[ -f "${COM_ATMOS_GOES}/${RUN}.t${cyc}z.control.goessimpgrb2" ]]; then
+   modelrecvy=$(cat < "${COM_ATMOS_GOES}/${RUN}.t${cyc}z.control.goessimpgrb")
+   recvy_cyc="${modelrecvy:8:2}"
+   recvy_shour="${modelrecvy:10:13}"
+
+   if [[ ${RERUN} == "NO" ]]; then
+      NEW_SHOUR=$(( recvy_shour + FHINC ))
+      if (( NEW_SHOUR >= SHOUR )); then
+         export SHOUR="${NEW_SHOUR}"
+      fi
+      if (( recvy_shour >= FHOUR )); then
+         echo "Forecast Pgrb Generation Already Completed to ${FHOUR}"
+      else
+         echo "Starting: PDY=${PDY} cycle=t${recvy_cyc}z SHOUR=${SHOUR}"
+      fi
+   fi
+fi
 
 ##############################################################################
 # Specify Forecast Hour Range F000 - F024 for GFS_NPOESS_PGRB2_0P5DEG
 ##############################################################################
 export SHOUR=000
 export FHOUR=024
+export FHINC=003
+if [[ "${FHOUR}" -gt "${FHMAX_GFS}" ]]; then
+   export FHOUR="${FHMAX_GFS}"
+fi
 
 ############################################################
 # Loop Through the Post Forecast Files 
@@ -109,6 +148,10 @@ done
 ################################################################
 export SHOUR=000
 export FHOUR=180
+export FHINC=003
+if [[ "${FHOUR}" -gt "${FHMAX_GFS}" ]]; then
+   export FHOUR="${FHMAX_GFS}"
+fi
 
 #################################
 # Process GFS PGRB2_SPECIAL_POST