Dear Colleagues,
The Community Satellite Processing Package (CSPP) project at CIMSS/SSEC/UW-Madison is pleased to announce the public release of the CSPP Sensor Data Record (SDR) version 3.1 software for Suomi-NPP and NOAA-20 (JPSS-1). This software package supports the calibration and geolocation of the Visible Infrared Imaging Radiometer Suite (VIIRS), Advanced Technology Microwave Sounder (ATMS), and the Cross-track Infrared Sounder (CrIS) instruments onboard the Suomi-NPP and NOAA-20 satellites.
What’s new in CSPP SDR version 3.1:
• Code base has been updated to Block 2.1 Mx2 (ADL5.3_I2.1.02), the current NOAA operational version.
• Filtering is now performed by default to remove incomplete or partial science RDRs prior to processing.
• Improved Look-Up-Table (LUT) and ancillary data download and local storage.
• New ancillary and LUT distribution site is used: http://jpssdb.ssec.wisc.edu/cspp_v_3_1/ .
• Fixed bug that repeated storage of LUT and ancillary data sets into the database.
• Expanded documentation including a frequently asked questions Appendix.
Note that this release replaces existing installations of CSPP SDR (it is not an update). In addition, with the release of the CSPP SDR Version 3.1, CSPP SDR Version 2.x dynamic Look-Up-Table (LUT) updates will no longer be supported.
The CSPP SDR version 3.1 software continues to support a number of unique features:
• Optional multi-core processing to reduce wait times while the SDR data are created (supported for VIIRS, CrIS, and ATMS),
• Optional aggregation and compression of SDR output files,
• Automated download of required ancillary data at runtime, plus offline scripted downloads,
• Offline scripted downloads of calibration lookup tables (LUTS).
System requirements for CSPP SDR version 3.1 have not changed from the CSPP SDR version 3.0 release:
• Intel or AMD CPU with 64-bit instruction support,
• 16 GB RAM, plus an additional 8GB of RAM for every core that is used for CSPP VIIRS SDR processing,
• CentOS 6 64-bit Linux (or other compatible 64-bit Linux distribution,
• 100 GB disk space (for the software and accompanying data).
Note about NOAA-20 Direct Broadcast Data Dropouts and CSPP RDR Filtering:
Transmission of the full suite of VIIRS, CrIS and ATMS on NOAA-20 periodically results in data dropouts primarily over land during the day. These dropouts result in packet loss at local receiving stations, and at times adversely affects the calibration of ATMS and CrIS. Therefore, the CSPP SDR software now filters partial spacecraft diary and science RDRs based upon standard sizes. The end effect of the added filtering is reduced output granule yields; however this guarantees the direct broadcast CSPP SDR output products match the operational NOAA instrument calibrated SDRs. The CSPP software allows the user to turn off the filtering by using the -s option to cris_sdr.sh and atms_sdr.sh, however we do not guarantee compliance with IDPS calibrated products if this option is used.
The CSPP SDR version 3.1 software is based on the Algorithm Development Library (ADL) software developed by Raytheon for the JPSS Project. ADL allows the operational processing algorithms for Suomi-NPP and NOAA-20 to run without modification in a Linux environment. CIMSS/SSEC has packaged the ADL versions of the Suomi-NPP and NOAA-20 algorithms so they can run from the Linux command line in real-time direct broadcast mode, but we have not changed the underlying processing software, algorithms, or data formats. The output files from the CSPP SDR processing software are identical in naming, format, and structure to the corresponding files from NOAA/NESDIS. The native format for the SDR products is HDF5, and descriptions of the S-NPP/NOAA-20 SDR file format and contents are available in CDFCB Volume III at:
https://jointmission.gsfc.nasa.gov/documents.html
The CSPP SDR version 3.1 software, documentation and test data is now available for download at:
http://cimss.ssec.wisc.edu/cspp/download/