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 3.1. Polar2Grid is open source software for reprojecting and gridding of polar orbiter satellite data including VIIRS, MODIS and AVHRR imager 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) program.
What is new in Version 3.1:
Polar2Grid Version 3.1 is a minor update that includes the following changes:
• Support for additional CSPP VIIRS Environmental Data Records (EDRs) with examples including:
• Aerosol Optical Depth (AOD) (JRR-AOD*.nc files)
• Cloud Top Height and Cloud Top Temperature (JRR-CloudHeight*.nc files)
• Surface Reflectances, including True Color (SurfRefl*.nc files)
• Vegetation Indices (NDVI,EVI) (CSPP SurfRefl*.nc files)
• Expanded examples section including additional VIIRS EDRs
• MiRS NOAA-21 ATMS products supported
• Support added for the FY-3E MERSI-LL instrument
• Re-organization of software directories
• Optimizations
• Bug fixes
The documentation includes descriptions of each reader and writer supported by Polar2Grid, along with many examples. We are happy to help with any questions or problems that you may have. Please use the `Contact Us` link at the bottom of any CSPP website page.
The following is a list of Satellite Instruments and Science Data Products supported by Polar2Grid Version 3.1:
• NOAA-21, NOAA-20, S-NPP VIIRS
• Aqua, Terra MODIS
• NOAA-18,-19, MetOP-B,-C AVHRR
• GCOM-W1 AMSR2
• FY-3D MERSI-2
• FY-3E MERSI-LL
• CSPP MiRS Microwave Retrievals
• CSPP ACSPO Sea Surface Temperature Retrievals
• CSPP VIIRS Active Fire Retrievals
• CSPP VIIRS AOD, Cloud Top Height, Cloud Top Temperature ASCI EDR products
• CSPP VIIRS Surface Reflectance Products, including Vegetation Index Products (NDVI,EVI)
• CSPP HEAP NUCAPS Atmospheric Profile Retrievals (CrIS/ATMS)
• CSPP CLAVR-x Cloud Retrievals
Features of Polar2Grid
• Execution is performed through simple bash shell scripts, wrapping python underlying modules. For example, to create GeoTIFF files of NOAA20 VIIRS I-Bands 1 and 5 using the default Platte Carrée (Google Earth) projection, you can execute a command like this:
polar2grid.sh -r viirs_sdr -w geotiff -p i01 i05 -f /viirs/sdr/SVI{01,05}*.h5 /viirs/geo/GITCO*.h5
• 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.
System Requirements
• Intel or AMD CPU with 64-bit instruction support (2+ cores - 2.4GHz)
• 16 GB RAM (minimum)
• Rocky 8 or Rocky 9 64-bit Linux (or other compatible 64-bit Linux distribution)
• 5 GB disk space (minimum)
• Source code, binaries, execution scripts and documentation are available for download at the CSPP website:
https://cimss.ssec.wisc.edu/cspp/polar2grid_v3.1.shtml
The online documentation is now available at: https://www.ssec.wisc.edu/software/polar2grid/
Sincerely,
Kathy Strabala and David Hoese