Community Satellite Processing Package

  CSPP Advanced Clear-Sky Processor for Oceans (ACSPO) Software Version 2.0 Release

28 October 2021

The University of Wisconsin CSPP team is releasing a new version of the NOAA/STAR Advanced Clear-Sky Processor for Oceans (ACSPO) software for retrieving sea surface temperature from direct broadcast (DB) AVHRR, MODIS and VIIRS imagers.

ACSPO development is led by Alexander Ignatov of the NOAA/NESDIS Center for Satellite Applications and Research (STAR). This CSPP release was created in close collaboration with Yury Kihai at STAR. This CSPP release (CSPP_ACSPO v2.0) is an implementation of NOAA ACSPO version 2.80 for AVHRR, MODIS and VIIRS, adapted and tested for operation in a real-time direct broadcast environment. The software contains binary executable files and supporting static data files.

What's New in CSPP_ACSPO v2.0?
  • The algorithm versions have been updated for all sensors (AVHRR, MODIS, VIIRS) to ACSPO v2.80, packaged and delivered as CSPP_ACSPO V2.0.
  • Added support for Metop-C AVHRR.
  • NOAA missions with AVHRR aboard (NOAA-15,16,17,18,19) are no longer supported.
  • Implementation and deployment is now done through a Singularity container; therefore a recent version of Singularity is now a system requirement.
  • The wrapper language used by the CSPP team has changed from Perl to R.
  • Environment variables associated with this package have been expanded.
  • Command line options and syntax have changed.
Supported Satellites and Sensors List: System Requirements for the CSPP_ACSPO v2.0 Software:
  • Singularity version 3.7.3 or above.
  • Intel or AMD CPU with 64-bit instruction support.
  • 8 GB RAM.
  • CentOS-7 64-bit Linux (or other compatible 64-bit Linux distribution).
  • 2.5 GB of disk space (plus space for your own DB data and CSPP_ACSPO products).
ACSPO Output Formats:

  • The CSPP ACSPO software generates two NetCDF4 output product files, which contain similar information. The two files are a result of continuing a legacy format, with file names like this:

  • and the addition of a GSD2 format, following a set of conventions specified by the Group for High Resolution Sea Surface Temperature (GHRSST). GSD2 examples filenames are listed below:

Complete installation, execution and product information is included with the release.