How to Ingest and Display Point Observation Data and Products into GEMPAK

Setting up your GEMPAK LDM configuration files

ldmd.conf
  • How to request lightning, wind profiler, ACARS, SuomiNet point observation data via the LDM.
  • Wind profiler and ACARS are in the FSL2 feedtype, lightning is in the NLDN feedtype, SuomiNet is in the GPS feedtype.

ldmd.conf example entry:


########################################
# Request Entries
########################################
#
# LDM servers request data from Data Sources
#
(request) (feedset|feedset)(pattern) (hostname pattern)
request	   FSL2|GPS           ".*"    idd.unidata.ucar.edu [sample host pattern, yours may differ]
request     NLDN	      ".*"    host.host.edu (NLDN is a propriatary feed and Unidata will facilitate
connection)	
    
More information regarding the FSL2, NLDN and GPS feeds and other feedtypes
pqact.conf
  • How to "act" on the data once it is on disk in the LDM queue.
  • Reminder: ALL spaces in the pqact.conf file need to be (tabs)!

pqact.conf example entries:


################################################################################
# GEMPAK Point source decoders
#
# NLDN lightning data
NLDN    .*
        PIPE    decoders/dcnldn -m 25000 -b 30 -s minute05
        -d data/gempak/logs/dcnldn.log
        -e GEMTBL=/home/gempak/NAWIPS/gempak/tables
        data/gempak/nldn/YYYYMMDDHHNN_nldn.gem

# FSL NetCDF Wind Profiler
FSL2    ^FSL\.NetCDF\.NOAAnet\.(windprofiler|RASS)\.(01hr)\.
        PIPE    -close  decoders/dcncprof
        -l data/gempak/logs/dcncprof.log
        -e GEMTBL=/home/gempak/NAWIPS/gempak/tables
        data/gempak/profiler/YYYYMMDD_pro.gem

FSL2    ^FSL\.NetCDF\.NOAAnet\.(windprofiler|RASS)\.(06min)\.
        PIPE    -close  decoders/dcncprof
        -l data/gempak/logs/dcncprof.log
        -e GEMTBL=/home/gempak/NAWIPS/gempak/tables
        data/gempak/profiler/YYYYMMDD_6min.gem

# FSL ACARS data
PCWS    ^FSL\.NetCDF\.ACARS\.QC
        PIPE    -close  decoders/dcacars
        -e GEMTBL=/home/gempak/NAWIPS/gempak/tables 
        -l data/gempak/logs/dcacars.log data/gempak/acars/YYYYMMDDHH_acars.gem


PCWS    ^FSL\.CompressedNetCDF\.MADIS\.acars\.(.*)\.gz
        PIPE    -close  decoders/dcgunzip decoders/dcacars
        -n data/madis/\1.nc
        -e GEMTBL=/home/gempak/NAWIPS/gempak/tables 
        -l data/gempak/logs/dcacars.log data/gempak/acars/YYYYMMDDHH_acars.gem

# Suominet data
#GPS    ^TEST
GPS     suoHWV.*nc$
        PIPE    -close  decoders/dcsuomi
        -d data/gempak/logs/dcsuomi.log
        -e GEMTBL=/home/gempak/NAWIPS/gempak/tables
        data/gempak/gps/YYYYMMDD_oldsuomi.gem
#
GPS     CsuPWVh.*nc$
        PIPE    -close  decoders/dcsuomi
        -d data/gempak/logs/dcsuomi.log
        -e GEMTBL=/home/gempak/NAWIPS/gempak/tables
        data/gempak/gps/YYYYMMDD_suomi.gem
    

Additional Information

For more information, please visit the GEMPAK Home Page.

Please direct any additional questions to support-gempak@unidata.ucar.edu