Change in the OSI SAF North Atlantic Regional Sea Surface Temperature product

Cécile Hernandez's picture
ID: 
2148

The OSI SAF North Atlantic Regional Sea Surface Temperature (NAR SST), currently based on Metop-B/AVHRR and NPP/VIIRS and identified OSI-202-b will be changed to OSI-202-c. This change corresponds to use of NOAA-20 data instead of NPP data as input.
The 2 files per day based on NPP, dated 02:00 and 13:00, will be replaced by 2 files based on NOAA-20, dated 01:00 and 12:00.
There will be no change on the 2 files per day based on Metop-B and dated 10:00 and 20:00.

This product has been validated against in situ measurements, you can find the validation report on
http://www.osi-saf.org/lml/doc/osisaf_cdop3_ss1_svr_leosafo_Metop_NOAA_1.1_.pdf
 
The Product User Manual and the Algorithms Theoretical Basis Document have been updated:
http://www.osi-saf.org/lml/doc/osisaf_cdop3_ss1_pum_leo_sst_3_6.pdf
http://www.osi-saf.org/lml/doc/osisaf_cdop3_ss1_atbd_leo_sst_1_8.pdf

For now, the files based on NOAA-20 are available on top of the NPP ones on the OSI SAF LML FTP server hosted by Ifremer:

in the directory sst/l3c/north_atlantic/nar_viirs_noaa_20/

It is planned to make the files based on NOAA-20 available on EUMETCast in November.

The files based on NPP will be discontinued in November.
 
Example file names on OSI SAF LML FTP server:
20201020120000-OSISAF-L3C_GHRSST-SSTsubskin-VIIRS_SST_NOAA20_NAR-sstnar_noaa20_20201020_120000-v02.0-fv01.0.nc
20201021010000-OSISAF-L3C_GHRSST-SSTsubskin-VIIRS_SST_NOAA20_NAR-sstnar_noaa20_20201021_010000-v02.0-fv01.0.nc