Community Satellite Processing Package

  CSPP Advanced Clear-Sky Processor for Oceans (ACSPO) Software Version 1.2 Release

26 September 2019

The University of Wisconsin CSPP team is releasing an updated 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), in conjunction with John Sapper of the NOAA/NESDIS Office of Satellite and Product Operations (OSPO). This CSPP release was created in close collaboration with John Stroup at STAR.

This CSPP release (CSPP_ACSPO v1.2) adds ACSPO version 2.61 for VIIRS, alongside the existing ACSPO version 2.40 for AVHRR and MODIS, adapted and tested for operation in a real-time direct broadcast environment. The software contains binary executable files and supporting static data files. To support v2.61 for VIIRS we now require CentOS-7.

What is new in CSPP_ACSPO v1.2?
  • NOAA-20 VIIRS instrument is now supported.
  • VIIRS Algorithm updated to ACSPO Version 2.61; MODIS and AVHRR algorithms remain unchanged at Version 2.40.
  • Version 2.61 GHRSST NetCDF files include the following structural changes:
    • The “quality_level” array fields have changed including the Fill Value.
    • A new array “brightness_temperature_08um6” is now included.
  • CentOS-7 64 bit Operating System or equivalent now required.
  • VIIRS Algorithm now requires both GMODO and GMTCO (Terrain Corrected) Geolocation files as input.
  • Multi-processor support added (-p option).
Supported satellites and sensors list: In addition, this version has been validated to use the new GFS FV3 forecast model files which became operational on June 12, 2019. For more information on the GFS FV3 transition, please see:

System requirements for the CSPP_ACSPO v1.2 software are as follows:
  • Intel or AMD CPU with 64-bit instruction support.
  • 8 GB RAM.
  • CentOS-7 64-bit Linux (or other compatible 64-bit Linux distribution).
  • 1.5 GB of disk space (plus space for your own DB data and CSPP_ACSPO products).
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, and the addition of a GSD2 format, following a set of conventions specified by the Group for High Resolution Sea Surface Temperature (GHRSST).

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