Global Sea Ice Emissivity

IDENTIFICATION
DescriptionThe sea ice surface emissivity is representative for the near 50 GHz channels used for temperature sounding of the atmosphere using satellite radiometers such as SSMIS and AMSU. The model for computing the emissivities is described in the ATBD. It uses the brightness temperatures at 19v, 37v and 37h measured by the conically scanning SSMIS.
Product typeNear real time productThumbnail
StatusDevelopment
IdentifierOSI-404-a
AcronymGBL SIEM
Acronym for EDC (APNM)OSIEMGB
Product navigator referenceEO:EUM:DAT:DMSP:SISE50
CHARACTERISTICS
Processing levelL3
Satellite inputDMSP/SSMIS
Other inputNone
Frequency1 per day
Central time12:00
Timeliness5 h
Spatial coverageglobal
Spatial sampling10 km
Characteristics & methodsSea ice emissivity at 50GHz, daily average.
Simulated with measured coefficients.
Including uncertainties.
ACCURACY REQUIREMENTS
Thresold accuracy15 %
Target accuracy5 %
Optimal accuracy1 %
Verification/validation methodCompare with RTM simulations using NWP
DATA ACCESS
Diffusion mean(s) and format(s)HL FTP Server (NetCDF3)
Main FTP serverOther FTP server,
other mean(s) to access main server


EUMETCastEUMETCastDiscovery mean(s)
EUMETSAT Data CentreEDC
Applications and usersNWP and Ocean/Ice models, operational Met and Sea Ice services.OSI SAF ProducerDanish Meteorological Institute
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Product web pageDescription
HISTORY, COMMENTS

Should replace OSI-404 in June-July 2018. Improvement is the inclusion of uncertainties.

Authorised to be operational/released11/06/2018