Dear Colleagues,
The Cooperative Institute for Meteorological Satellite Studies (CIMSS) at the University of Wisconsin-Madison is pleased to announce a release of the Community Satellite Processing Package (CSPP) VIIRS Environmental Data Record (EDR) science software in support of the NOAA-21, NOAA-20 and SNPP direct broadcast community. This software supports the creation of VIIRS Atmosphere Products from direct broadcast Sensor Data Record inputs.
The VIIRS ATMOS EDR software package includes binary executable files, supporting static data files, and input and output files for verifying successful local installation. This CSPP release (VIIRS ATMOS Version 1.0) offers NOAA VIIRS ATMOSphere EDR Software Versions 3.2, adapted and tested for real-time direct broadcast environments. It supersedes the Atmosphere Products previously created as part of the CSPP ASCI package.
The NOAA ASSISTT group worked with the CSPP team to integrate the JPSS processing framework enterprise algorithms into stand alone executables, which can then be implemented through simple CSPP bash shell and python scripts. The output files created by this software are identical in naming, format (NetCDF), and structure to the corresponding NOAA archived files.
How Does CSPP VIIRS ATMOS Differ from CSPP VIIRS ASCI?
This software serves as a replacement for the atmosphere portion of the CSPP VIIRS Aerosols, Cryosphere (Snow/Ice), Clouds and Volcanic Ash (ASCI) package. The CSPP Team has divided the large ASCI package into separate Atmosphere, Cryosphere and Land components, which will all be released in the near future. Important differences between the CSPP ASCI and CSPP ATMOS are listed below. Please see the installation guide for more information.
• CSPP VIIRS ATMOS creates Atmosphere products only.
• CSPP ATMOS Version 1.0 adds support for NOAA-21 VIIRS.
• The target Operating System for CSPP ATMOS is Rocky Linux 8.10.
• CSPP ATMOS requires considerably more processing resources than CSPP ASCI. Please see the System Requirements Section.
• The algorithms have been updated to NOAA Versions 3.2, with the exception of the VIIRS Cloud Cover Layers product, which is Version 2.0.
• The dynamic ancillary data Global Forecast System (GFS) Numerical Weather Prediction (NWP) input files used by CSPP ATMOS are .25 degree resolution; CSPP ASCI used .50 degree resolution input files.
• The local dynamic ancillary data cache structure has changed. All dynamic ancillary is stored directly in the top level CSPP_DYNAMIC_ANCIL_DIR and not within any other sub-directories.
The CSPP VIIRS ATMOS EDR Version 1.0 software supports the following products:
• VIIRS Cloud Retrievals, including Cloud Mask, Cloud Top Properties, Cloud Phase, Cloud Type, Cloud Base Height, Cloud Cover/Layers and Cloud Daytime and Nighttime Microphysical Properties.
• VIIRS Aerosol Retrievals, including Aerosol Optical Depth, and the Aerosol Detection Product.
• VIIRS Volcanic Ash Retrievals, including Ash Top Height, Ash Top Temperature, Ash Effective Radius and Ash Optical Depth.
CSPP VIIRS ATMOS EDR Version 1.0 Software Features:
• Easy execution through a main bash shell script, viirs_atmos.sh,
• Dynamic ancillary data files are automatically downloaded as needed from SSEC servers at runtime, or pre-loaded through a separate ancillary script,
• Multi-core processing is supported (-p option).
CSPP VIIRS ATMOS EDR Version 1.0 System Requirements:
• Intel or AMD CPU with 64-bit instruction support,
• 8 GB RAM (minimum) per core,
• Rocky Linux 8.10. The software has also been tested on Rocky Linux release 9.4,
• 70 GB disk space (minimum),
• Internet connection (for downloading dynamic ancillary data).
Note: For routine real-time processing of S-NPP, NOAA-20, and NOAA-21 direct broadcast, a Linux server running Rocky Linux 8 with 64 cores, 256 GB RAM, and 8 TB hard drive space is recommended. These are the same system specifications as needed for routine SDR file creation.
Scott Mindock leads the CSPP VIIRS ATMOS EDR development at the CIMSS/Space Science and Engineering Center (SSEC) with funding support from the NOAA/NASA Joint Polar Satellite System (JPSS). The CSPP VIIRS atmos software package contains binary executable files, driver scripts, static ancillary data files, detailed documentation, and test data for verification of a successful installation. It can be downloaded from the CSPP website:
https://cimss.ssec.wisc.edu/cspp/