GEMPAK 7.5.1

Download at https://www.unidata.ucar.edu/downloads/gempak/index.jsp

Release Notes

  • Supports GOES-16/17 ABI imagery in NetCDF 4 format
  • Fixed build of program dctama

GEMPAK Support for GOES ABI NetCDF


GOES16 and GOES17 ABI products are distributed in NetCDF4 formatted files, and GEMPAK as of release 7.5.1 can now read and display these products in their native formats (it is no longer needed to convert netCDF to McIDAS area format to display in GEMPAK).

For Full Disk and CONUS sectors, GOES16 and GOES17 ABI products are sent across the Satellite Broadcast Network as tiles, each contributing to a "mosaic" of a full sector scan. The Unidata Program Center has provided an alternate data feed in which all tiles are "stitched" together (thanks to the program ldm-alchemy).

ldmd.conf

To request these stitched images, add the following request line to your ldmd.conf:

REQUEST NIMAGE "GOES" idd.unidata.ucar.edu

pqact.conf

The following pattern action

NIMAGE     ^/data/ldm/pub/native/satellite/GOES/(.*)/([^/]*)/([^/]*)/([0-9]{8})/GOES(16|17)_([^/]*)_([0-9]{8})_([0-9]{4})(..)_([^/]*).nc4
        FILE    -close  data/gempak/images/sat/\1/\2/\3/\3_\7_\8

will create files such as :

$SAT/GOES16/CONUS/Channel02/Channel02_20181227_1812
$SAT/GOES16/CONUS/Channel08/Channel08_20181227_1812
$SAT/GOES16/CONUS/Channel13/Channel13_20181227_1942

for each of the 16 ABI channels (here the environmental variable SAT = /data/ldm/gempak/images/sat/) and each available sector (e.g. CONUS above).

NMAP2 Display

The above pqact.conf entry will write images to directories in $SAT, which are then selectable in NMAP2 > New Data Source > Image

GOES16 Full Disk

GOES16 CONUS

GOES16 PRREGI

GOES16 Mesoscale-1

GOES16 Mesoscale-2

GOES17 Full Disk*

  • as seen above there is still a map projection error for GOES17 Full Disk images.

GOES17 CONUS

GOES17 AKREGI

GOES17 HIREGI

GOES17 Mesoscale-1

GOES17 Mesoscale-2

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