Thursday, April 25, 2024

The PO.DAAC is pleased to announce the public release of the NAVO N20/N21 VIIRS L2P v3.0 Sea Surface Temperature (SST) datasets from the Visible Infrared Imaging Radiometer Suite (VIIRS) instruments onboard the Joint Polar Satellite System 1 (JPSS-1) and JPSS-2 satellites, renamed as NOAA-20 (N20) and NOAA-21 (N21).

The newly added N20/N21 datasets complement the existing dataset from NAVO NPP VIIRS L2P dataset (10.5067/GHVRS-2PN30). Both datasets are produced with NAVO's Level-2 SST processor version 3.0 (v3.0). The datasets are formatted in netCDF-4, compliant with the Group for High Resolution Sea Surface Temperature (GHRSST) Data Processing Specification v2.0 (GDS2). Detailed information regarding the GHRSST L2P products are available from the GHRSST website and also via PO.DAAC’s GHRSST mission webpage.

The L2P datasets are reported in the instrument native swath projection with 750 m (along) x 750 m (cross) spatial resolution, and provide the global near daily-coverage SST at 1-meter depth . Each day consists of 1012 granules with a daily data volume of 15 GB/day. The L2P SST v3.0 is the first release at PO.DAAC derived from the L2P SST processor v3.0, which was upgraded from the v2.0 with several significant improvements in processing algorithms, including contamination detection, cloud detection, and data format upgrades.

For more details, please see documentation on dataset landing pages. We recommend users to download the data with the data-subscriber tool.



Jean-François P. Cayula, Douglas A. May, Bruce D. McKenzie, Keith D. Willis. 2013. VIIRS-derived SST at the Naval Oceanographic Office: from evaluation to operation, SPIE digital library, 8724.

Jean-François P. Cayula, Douglas A. May, Bruce D. McKenzie. 2014. Analysis of the VIIRS cloud mask, comparison with the NAVOCEANO cloud mask, and how they complement each other, SPIE digital library, 9111.

Comments/Questions? Please contact or visit the PO.DAAC on Earthdata Forum.