Medium Resolution Sea Ice Drift

IDENTIFICATION
Description	Ice motion vectors with a time span of 24 hours are estimated by a maximum cross-correlation method (MCC) on pairs of satellite images. Input data are ~1km Infra Red or Visible data from the AVHRR instrument on board the Metop satellite.
Product type	Near real time product
Status	Operational
Identifier	OSI-407-a
Acronym	NH MR SIDR
Acronym for EDC (APNM)	OMRSIDRN
Product navigator reference	EO:EUM:DAT:METOP:NH-MR-SID

CHARACTERISTICS
Processing level	L3
Satellite input	Metop/AVHRR
Other input	None
Frequency	4 per day
Central time	~00:00, ~06:00, ~12:00, ~18:00
Timeliness	6 h
Spatial coverage	Northern Hemisphere
Spatial sampling	20 km
Projection	Polar stereographic
Characteristics & methods	Single sensor analysis. Displacement after 24 hours in km. Including uncertainties.

ACCURACY REQUIREMENTS
Thresold accuracy	5 km yearly std deviation after 24 hours displacement
Target accuracy	2 km yearly std deviation after 24 hours displacement
Optimal accuracy	1 km yearly std deviation after 24 hours displacement
Verification/validation method	Collocation with buoys

DATA ACCESS
Diffusion mean(s) and format(s)	HL FTP Server (NetCDF3)
Main FTP server	HL FTP server, last 31 days (hosted by MET Norway)	Other FTP server, other mean(s) to access main server	Archive HL FTP server Thredds
EUMETCast	EUMETCast	Discovery mean(s)
EUMETSAT Data Centre	EDC	Discovery mean(s)
Applications and users	Ocean/Ice and NWP models, operational Met and Sea Ice services	OSI SAF Producer	Danish Meteorological Institute

VIEW MORE		DOCUMENTATION
Product web page	Description	Product User Manual	PUM
Live production status	Production status	Algorithm Theoretical Baseline Document	ATBD
Last products at a glance	Quicklook	Scientific Validation Report	SVR

HISTORY, COMMENTS
Replaced OSI-407 on 11 October 2018. Main changes are : use of satellite Metop-B instead of Metop-A, product computed 4 times daily (insead of 2 times previously), individual uncertainties for each ice drift vector.
Authorised to be operational/released	04/04/2018
Declared operational/released	11/10/2018
On EUMETCast since	11/10/2018
In EDC since	11/10/2018
First product date	11/10/2018

Disclaimer : All intellectual property rights of the OSI SAF products belong to EUMETSAT. The use of these products is granted to every interested user, free of charge. If you wish to use these products, EUMETSAT’s copyright credit must be shown by displaying the words “Copyright © 2019 EUMETSAT” on each of the products used.

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