SSEC forums

Dear Colleagues,

The University of Wisconsin Space Science and Engineering Center (SSEC) is pleased to announce a new release of the Community Satellite Processing Package (CSPP) Polar2Grid software Version 2.3. Polar2Grid is open source software for reprojecting and gridding of polar orbiter satellite data including S-NPP and NOAA-20 VIIRS, MODIS and AVHRR instruments into a variety of output formats including:

• GeoTIFF files,
  Advanced Weather Interactive Processing System (AWIPS) gridded files. AWIPS is the visualization and analysis tool used operationally by the US National Weather Service (NWS),
  Keyhole Markup language Zipped (KMZ) files,
  HDF5 files, and
  Binary files.

Polar2Grid is designed to make it easy to create high quality images from Polar Orbiter data and science products. Development is led by David Hoese with funding support from the NOAA/NASA Joint Polar Satellite System (JPSS).

What is new in Version 2.3:

• Support for additional instruments,
  • FY3-B, -C VIRR.
    FY3-D MERSI-2.
  Support for an additional Science Data Product,
  • VIIRS CSPP Active Fire EDRs.
  New utility script and enhancements,
  • "overlay.sh" for overlaying one GeoTIFF over another. For example, overlay Active Fires on a Day/Night band image.
    Added a '--borders-width' option to "add_coastlines.sh".
    Added example section on working with ASCPO SST images.
  Bug Fixes,
  • Fix AVHRR reader not masking bad 0 values.
    Fix MIRS reader not using valid range properly.

Features of Polar2Grid

• The software is modular, robust and efficient.
  Execution is performed through simple bash shell scripts, wrapping python underlying modules. For example, to create GeoTIFF files of Suomi-NPP VIIRS SDR I-Bands 1 and 5 using the default Platte Carrée (Google Earth) projection, you can execute a command like this:
  polar2grid.sh viirs gtiff -p i01 i05 -f << Path to SDR files >>
  True color and False color reprojections can be created using a single command.
  If more than one contiguous granule is provided as input, an aggregated output image file will be created.
  Users can define their own grids. A grid definition helper script is included with the package.
  Proj4 grid definitions can be used.
  The Polar2Grid open source software code repository is also available through github at: https://github.com/ssec/polar2grid.

The following is a list of Satellite Instruments and Science Data Products supported by Polar2Grid Version 2.3:

• NOAA-20, S-NPP VIIRS
  Aqua, Terra MODIS
  NOAA-18,-19, MetOP-A,-B,-C AVHRR
  GCOMW-1 AMSR2
  FY3-D MERSI-2
  FY3-B,-C VIRR
  CSPP CLAVR-x Cloud Retrievals
  CSPP MIRS Microwave Retrievals
  CSPP ACSPO Sea Surface Temperature Retrievals
  CSPP VIIRS Active Fire Retrievals
  CSPP NUCAPS Atmospheric Profile Retrievals (CrIS/ATMS)

Software, execution scripts and documentation are included with the release: http://cimss-test.ssec.wisc.edu/cspp/po ... v2.3.shtml