Community Satellite Processing Package

  CSPP Polar2grid Reprojection Software Version 2.3 Release

13 January 2020

The CSPP Polar2Grid Software was created to enable Polar Orbiter Satellite Instrument users (for example, VIIRS, AVHRR and MODIS), including the US National Weather Service (NWS), the capability to easily create high quality reprojected imagery. NOAA JPSS has funded this effort to create an open-source, modular application system in support of direct broadcast users. This bundled solution automates tools for converting satellite data including Suomi-NPP and NOAA-20 VIIRS into a variety of output formats, including GeoTIFFs, AWIPS compatible NetCDF files, NinJo forecasting workstation compatible GeoTIFF images, as well as binary and HDF5.

In addition to traditional visible, infrared and microwave imagery, the software provides the capability to easily create sharpened true color and sharpened false color images.

What is new in Version 2.3:

  • Support for additional instruments
    • FY3-B, -C VIRR.
    • FY3-D MERSI-2.
  • Support for 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:
  • 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.

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