Licensed under CC BY 4.0 by EUMETSAT
High Latitude L2 Sea and Sea Ice Surface Temperature
Operational Near real time productLevel 2 sub-skin Sea and Sea-ice Surface Temperature derived from VIIRS on NOAA, over northern high latitudes (Poleward of 50N) and provided in full-resolution swath (1 km at nadir), in GHRSST-like netCDF format. A similar product derived from AVHRR on Metop exists.
Identification
Acronym : HL L2 SST/IST
EUMETSAT collection ref. :
EO:EUM:DAT:0066
OSI SAF producer : Norwegian Meteorological Institute
Identifier : OSI-205-b
Characteristics
Processing level : L2
Satellite input : NPP/VIIRS
Temporal sampling : Up to 15 files/day
Central time : NA
Timeliness :
?
The timeliness is the time elapsing from the sensing time of the last contributing file to the product dissemination to users. It is similar to the latency.
3h
Spatial coverage : Poleward of 50N
Spatial sampling : 1 km
Projection : Swath
File Format(s) : NetCDF4
Characteristics & methods : The product consists of Sea and Sea Ice Surface temperatures (SST and IST) and an unvalidated test temperature field, Land Ice Surface Temperature (LIST) for the Greenland and Antarctic ice caps. SST is subskin temperature, IST is skin temperature.
The temperature is retrieved using a multispectral algorithm and a cloud mask, using the PPS software from the NWC SAF.
The product covers the sea and ice areas polewards of latitudes 50N with 3-minute data segments in Level 2, with data processed and archived continuously throughout the day, as they become available (approximately 110 3-minute segments per day per hemisphere). The product is derived from NPP/VIIRS data and includes uncertainties.
The temperature is retrieved using a multispectral algorithm and a cloud mask, using the PPS software from the NWC SAF.
The product covers the sea and ice areas polewards of latitudes 50N with 3-minute data segments in Level 2, with data processed and archived continuously throughout the day, as they become available (approximately 110 3-minute segments per day per hemisphere). The product is derived from NPP/VIIRS data and includes uncertainties.
Data Access
OSI SAF FTP server (last 31 days)
ftp://osisaf.met.no/prod/
Directory: sst/l2p_viirs
OSI SAF FTP server (archive)
ftp://osisaf.met.no/archive/
Directory: sst/l2p_viirs
OSI SAF Thredds
EUMETSAT Multicast
Accuracy Requirements
Target accuracy : SST absolute mean difference: 0.7 K, SST standard deviation: 1.0 K; IST absolute mean difference: 1.5 / 3.5 K, IST standard deviation: 2.0 / 3.0 K
Verification/validation method : SST: Comparison with buoy observations. IST: IST: comparison IR radiometer when available and with buoy measurements on the ice
Applications and users
Usage : * Operational Met Services,
* Operational analyses and ocean models,
* Research or Environmental monitoring
* Operational analyses and ocean models,
* Research or Environmental monitoring
History
Authorised to be operational / released :
Declared operational / released since :
On EUMETCast since :
On EDC since :
On FTP server since :
Expected date for operational/released :
First date :
Full series temporal coverage : 2016-onwards
Licence/Attribution/Citation
Licence : CC BY 4.0
Attribution : You must include attribution to EUMETSAT OSI SAF
Recommended citation : EUMETSAT OSI SAF, High Latitude L2 Sea and Sea Ice Surface Temperature (NPP) (2019), OSI-205-b
Comments
New ticket helpdesk
See also OSI-205-a (same product but based on Metop-B data)