Suomi National Polar-orbiting Partnership (NPP) Sensor Data Record (SDR) Software Version 2.1.1 Patch
29 September 2015
New SDR packages supporting 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.
Software Updates in Version 2.1.1
- This update is required for users to continue to process CrIS data after the transition to extended spectral resolution data. This update is distributed as a patch rather than a full software release, therefore users must first install SDR 2.1, then install the SDR 2.1.1 patch.The JPSS project will transition CrIS direct broadcast to extended spectral resolution data. In extended spectral resolution mode, extra data points will be transmitted from the CrIS instrument. These points may be used by a future SDR algorithm version to reduce ringing artifacts that are visible in certain channels. While the SDR 2.1.1 software will not make use of the extra points, the 2.1.1 update is needed to continue generating a valid product. This software update is backward compatible, so that it can be installed prior to the transmission change. Users who have applied the CSPP SDR v2.1.1 patch should see no change in the output SDR product after the change to CrIS extended spectral resolution.
- The CSPP SDR V2.1.1 patch includes an updated ADL Leap Second file from 1 July 2015.
Software Updates in Version 2.1
- Updated science algorithms to ADL 4.2.6 (IDPS Mx8.6). In VIIRS SDR products created by previous versions of the CSPP SDR software, dual-gain bands (SVM01, SVM02, SVM03, SVM04, SVM05, SVM07, SVM13) would sometimes contain non-physical values in regions where data was missed during a DB pass. This caused problems such as the VIIRS Active Fire algorithm to detect spurious fire locations. In this version of the VIIRS SDR software, the missing values and quality flags for these regions are set correctly, and the VIIRS Active Fire algorithm should not detect spurious fires,
- Added logic for reconstructed M-Band 7 quality flags using input from I-Band 2
- Added parallelization option for aggregation. Using the -p (num_procs) option with the -a option will now result in parallelization of SDR software execution and file aggregation,
- Quick look naming conventions have been standardized.
- Bug fixes:
- A bug was corrected in the get_anc_jpss_polarwander.bash affecting some archived data processing. It did not affect real-time processing,
- and, a bug was corrected that caused the SDR software to fail when using directories that included an "_c" in a path name.
This release replaces existing installations of CSPP SDR (it is not an update). Please note that the CACHE and STATIC tarballs from CSPP V2.0 can be reused with this release.
The CSPP SDR software package 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 to run without modification in a Linux environment. SSEC has packaged the ADL versions of the Suomi NPP 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 NPP SDR products is HDF5, and descriptions of the NPP
file formats are available here (see the Common Data Format Control Books).