How to Ingest and Display RADAR Data into GEMPAK

How to Ingest and Display RADAR Data into GEMPAK

  • GEMPAK can display Level II and Level III (NIDS) RADAR Data

    • How to set up your GEMPAK LDM configuration files

  • The GEMPAK distribution includes a template script that will have the most current actions included. To see more information regarding this process vistit the GEMPAK documentation about this topic.
  • The information below is only an example of how the ldmd.conf and pqact.conf files may look. Your paths and actions may differ, but the information below should give a general idea on the process as well as descriptions and explanations of some of the terms.

    ldmd.conf

  • How to request RADAR data via the LDM
  • ldmd.conf example entry:

    ########################################
    # Request Entries
    ########################################
    #
    # LDM servers request data from Data Sources
    #
    # (request)     (feedset|feedset|feedset)           (pattern)      (hostname pattern)

    request      NEXRAD2|NNEXRAD|FNEXRAD      ".*"     idd.unidata.ucar.edu
    [sample host pattern, yours may differ]

  • For more information regarding the NEXRAD2 (Level II), NNEXRAD (Level III-NIDS), FNEXRAD (mosaics derived from Level III data) feeds and other feedtypes, please visit: 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: 
    NEXRAD2   ^L2-BZIP2/(....)/([0-9][0-9][0-9][0-9][0-1][0-9][0-3][0-9])([0-2][0-9][0-5][0-9])([0-9][0-9])
        FILE    data/gempak/nexrad/craft/\1/.\1_\2_\3


    NEXRAD  ^SDUS[2357]. .... ([0-3][0-9])([0-2][0-9])([0-6][0-9]).*/p(...)(...)
        FILE    -overwrite      -close  data/gempak/nexrad/NIDS/\5/\4/\4_(\1:yyyy)(\1:mm)\1_\2\3


    FNEXRAD ^rad/NEXRCOMP/(...)/(...)_(........)_(....)
        FILE    -close  data/gempak/images/sat/NEXRCOMP/\1/\2/\2_\3_\4

    GEMPAK Home Page

    If you have additional questions they should be directed to:
    support-gempak@unidata.ucar.edu