Medspiration: Meteo France/Meteo France, Centre de Meteorologie Spatiale (CMS), Lannion, 22303 Lannion, cedex, France; EUMETSAT Ocean; Sea Ice Satellite Application Facility 20041215 01:00:00 Medspiration L2P NAVOCEANO MCSST Level 2 HRPT/LAC data Not specified 1.0 Plouzane (Brest), France Medspiration, IFREMER/CERSAT ftp://ftp.ifremer.fr/ifremer/valmedspi High quality Sea Surface Temperatures (SSTs) maps derived from the NOAA (National Oceanic and Atmospheric Administration)-Polar Orbiting Advanced Very High Resolution Radiometer (AVHRR) have been available since 1981. The multichannel sea surface temperature algorithm (MCSST) has been used to routinely calculate SSTs using a split window approach. Currently this algorithm is applied by the Naval Oceanographic Office (NAVOCEANO) to calculate SSTs at a near real-time rate. The multichannel sea surface temperature algorithm uses a set of linear coefficients to retrive sea surface temperature from the brightness radiances. Improved cloud retrieval algorithms applied by NAVOCEANO have significantly increased the number of SST pixels flagged as cloud free, as compared to previous MCSST data sets. The NAVOCEANO MCSST data sets provide a high quality near real time sea surface temperature data set with a high number of cloud free retrievals. Additionally the orbital temporal and 9km spatial resolutions allow this data to be used in a quasi real time mode for detection of mesoscale features such as eddies associated with major current systems. The history of SST computation from AVHRR radiances is discussed at length by [McClain et al., 1985]. Briefly, radiative transfer theory is used to correct for the effects of the atmosphere on the observations by utilizing 'windows' of the electromagnetic spectrum where little or no atmospheric absorption occurs. Channel radiances are transformed (through the use of the Planck function) to units of temperature, then compared to a-priori temperatures measured at the surface. This comparison yields coefficients which, when applied to the global AVHRR data, give estimates of surface temperature which have been nominally accurate to 0.7 degrees Celsius. Each AVHRR scan views Earth for 51.282 milliseconds, during which time each channel of the analog data output is digitized. Scans occur at the rate of 6 per second, and the sampling rate of the AVHRR sensors is 39,936 samples per second per channel. During a scan, the detectors view an internal target, cold space, and the external scene. The temperature of the internal target is monitored, and space is assumed to have a black- body temperature of 3K. In this way, a simple two-point linear calibration is done internally (Schwalb, 1978). The nonlinear modification to this calibration is achieved at the time of postprocessing, and takes into account sensor nonlinearities, measurement of internal target temperature, calculation of target radiance, internal reflections and emissions, etc. Sensor/Instrument Measurement Geometry:The AVHRR has a cross-track scanning system which use an elliptical beryllium mirror rotating at 360 RPM about an axis parallel to the Earth. The 110.8 degree cross-track scan equates to a swath width of about 2700 km. This swath width is greater than the 25.3 degree separation between successive orbital tracks, and provides overlapping coverage. Coverage is global, twice daily, at an instantaneous field of view (IFOV) of ~1.4 milliradians, giving a ground field of view of ~1.1 km at nadir for a nominal altitude of 833 km. Full resolution AVHRR data are continuously transmitted and recorded in High Resolution Picture Transmission (HRPT) format. The Global Area Coverage (GAC) data are subsampled to approximately 4 km IFOV, recorded internally, and downlinked daily. The MCSST coefficients are then applied to the infrared brightness radiances to convert to SST. A level 2 declouded product produced by the Naval Oceanographic Office (NAVOCEANO) is then downloaded to JPL for distribution. Granularity: (http://harp.gsfc.nasa.gov:1729/eosdis_documents/glossary.of.terms.html#GRANULE) The level 2 product is separated into orbital files with each file consisting of an ascending (daytime) and descending (nighttime) pass. Data are available from both the NOAA-14 and NOAA-16 satellites. Data Format: The data and information are stored in a packed binary format where each file begins with a 770 byte header record followed by 1406 byte data blocks. The number of data blocks in each file varies depending on the number of good retrievals in each orbit. Please refer to the following document: Appendix D. NAVOCEANO Products and File Format: Release 2 Version 2 (ftp://podaac.jpl.nasa.gov/pub/sea_surface_temperature/avhrr/navoceano_mcsst/doc/Appn-D-NAVO.pdf) L2P data products are then derived following the GHRSST-PP Data Processing Specification (GDS) version 1.5 avaialable from http://ghrsst-pp.metoffice.com/documents/GDS-v1.0-rev1.5.pdf. Single Sensor Error Statistics (SSES) are provided based on the GDS-v1.5 specification. The Global Ocean Data Assimilation Experiment (GODAE) high-resolution sea surface temperature (GHRSST) project data. Entry ID: EUR-L2P-AVHRR17_L Projection_Information: Projection Type: Satellite native swath along-track Ellipsoid_Type: Other Projection Details: Satellite swath data with latitude and longitude for each pixel measurement Data Resolution: Latitude resolution: 2.2 Longitude resolution: 2.2 The temporal resolution: 6 hours Several overpasses per day in the Medspiration EU-RDAC area This metadata record was generated from an original data set description (DSD) record in .DIF format: http://www.ghrsst-pp.org Reference: Medspiration products user manual, Robinson I., Leborgne P., Piolle J.F., Larnicol G., v1.02, September 2004 Sources: NOAA-17 National OCeanographic and Atmospheric Administration Environmental Satellite 17 Sensors: AVHRR/2 Advanced Very High Resolution Radiometer version 3 2004-12-15 01:00:00 2004-12-15 01:00:00 2004-12-15 01:00:00 Complete As needed -45.000 40.380 51.640 20.000 GCMD Earth Science Oceans Ocean Temperature Sea Surface Temperature None AVHRR/2 Advanced Very High Resolution Radiometer version 3 GCMD Atlantic Ocean none Medspiration Eu-rdac Area Including Atantic Ocean, Mediterranean, Baltic And Bla None GHRSST protocol describes data use as open. Jean-francois Piolle Francais de Recherche pour l'Exploitation de la Mer / Centre ERS d'Archivage et de Traitement (Medspiration IFREMER / CERSAT) Technical Contact Mailing and Physical Address

IFREMER/CERSAT, technopole Brest-Iroise, 29280 Plouzane, France

IFREMER/CERSAT, technopole Brest-Iroise, 29280 Plouzane, France IFREMER/CERSAT, technopole Brest-Iroise, 29280 Plouzane, France IFREMER/CERSAT, technopole Brest-Iroise, 29280 Plouzane, France IFREMER/CERSAT, technopole Brest-Iroise, 29280 Plouzane, France +33 (0)2 98 22 46 91 +33 (0)2 98 22 45 33 jfpiolle@ifremer.fr Standard Business hours, Europe Phone/FAX/Email Medspiration: Meteo France/Meteo France, Centre de Meteorologie Spatiale (CMS), Lannion, 22303 Lannion, cedex, France; EUMETSAT Ocean; Sea Ice Satellite Application Facility Medspiration: Meteo France/Meteo France, Centre de Meteorologie Spatiale (CMS), Lannion, 22303 Lannion, cedex, France; EUMETSAT Ocean; Sea Ice Satellite Application Facility 2004-12-15 01:00:00 Medspiration: Meteo France/Meteo France, Centre de Meteorologie Spatiale (CMS), Lannion, 22303 Lannion, cedex, France; EUMETSAT Ocean; Sea Ice Satellite Application Facility 2004-12-15 01:00:00 http://www.medspiration.org 2.2 2.2 Decimal degrees Dr. Kenneth Casey NOAA National Oceanographic Data Center Physical scientist mailing address

NOAA National Oceanographic Data Center SSMC3, 4th Floor, Room 4853, Route: E/OC1 1315 East-West Highway

Silver Spring Maryland 20910 U.S.A. (301)713-3300 FAX: (301) 713-3300 Kenneth.Casey@noaa.gov 9:00 AM-4:00 PM, EST Phone/FAX/E-mail/letter NODC Accession #0006271 NOAA makes no warranty regarding these data, expressed or implied, nor does the fact of distribution constitute such a warranty. NOAA and NODC cannot assume liability for any damages caused by any errors or omissions in these data, nor as a result of the failure of these data to function on a particular system. netCDF 2004-12-15 01:00:00 GHRSST formatted file (netCDF version 3); see: The Recommended GHRSST-PP Data Processing Specification, GDS (Version 1 revision 1.5), GHRSST-PP Report Number 17. sea surface temperature data See: The Recommended GHRSST-PP Data Processing Specification, GDS (Version 1 revision 1.5), GHRSST-PP Report Number 17. 0.214 http://www.nodc.noaa.gov/search/prod/ Data may be directly downloaded through the NODC Ocean Archive System at: URL: http://www.nodc.noaa.gov/search/prod/. NODC can be contacted directly for custom orders. When requesting data from the NODC, the desired data set may be referred to by the 7-digit number given in the RESOURCE DESCRIPTION field of this metadata record. For more information see the NODC GHRSST project web site: URL: http://ghrsst.nodc.noaa.gov Standard Internet browser and FTP capability ftp://data.nodc.noaa.gov/pub/data.nodc/ghrsst Direct FTP access: Navigate to ftp://data.nodc.noaa.gov/pub/data.nodc/ghrsst using any FTP client to begin downloading data. For more information see the NODC GHRSST project web site: URL: http://ghrsst.nodc.noaa.gov Any FTP client http://data.nodc.noaa.gov/ghrsst Simple Web access: Using any web browser, navigate to URL: http://data.nodc.noaa.gov/ghrsst and begin browsing through the file hierarchy. Clicking on any of the files will prompt you to download that file or will launch any application associated with netCDF files. For more information see the NODC GHRSST project web site: URL: http://ghrsst.nodc.noaa.gov Standard Internet browser and/or software capable of utilizing netCDF files http://data.nodc.noaa.gov/cgi-bin/nph-dods/ghrsst These data are also served using OPeNDAP (formerly DODS) server. The base URL is: URL: http://data.nodc.noaa.gov/cgi-bin/nph-dods/ghrsst For more information see the NODC GHRSST project web site: URL: http://ghrsst.nodc.noaa.gov For a listing of OPeNDAP clients which may be used to access OPeNDAP-enabled data sets, please see the OPeNDAP web site at URL: URL: http://opendap.org/ Standard Internet browsers can browse OPeNDAP servers and specialized OPeNDAP software can enable more sophisticated data access and visualizations. none Data may be directly downloaded through the NODC website at: http://www.nodc.noaa.gov/search/prod/. NODC can be contacted directly for custom orders. (When requesting data from the NODC, the desired data set may be referred to by the 7-digit number given in the RESOURCE DESCRIPTION field of this metadata record). Within 24 hours if directly downloaded, depending on size Contact the NODC User Services Group via phone/FAX/E-mail: nodc.services@noaa.gov Working knowlege of netCDF files and ability to work with satellite data strongly recommended. 20050330 Unknown Present Unknown Jean-Francois Piolle Francais de Recherche pour l'Exploitation de la Mer / Centre ERS d'Archivage et de Traitement (Medspiration IFREMER / CERSAT) Technical contact mailing address

IFREMER/CERSAT, technopole Brest-Iroise, 29280 Plouzane, France

IFREMER/CERSAT, technopole Brest-Iroise, 29280 Plouzane, France IFREMER/CERSAT, technopole Brest-Iroise, 29280 Plouzane, France IFREMER/CERSAT, technopole Brest-Iroise, 29280 Plouzane, France IFREMER/CERSAT, technopole Brest-Iroise, 29280 Plouzane, France +33 (0)2 98 22 46 91 +33 (0)2 98 22 45 33 jfpiolle@ifremer.fr Standard Business hours, Europe Phone/FAX/Email DSD-EUR-L2P-AVHRR17_L.xml Unknown; see http://www.ifremer.fr/cersat/en/index.html netCDF 2004-12-15 01:00:00 GHRSST formatted file (netCDF version 3); see: The Recommended GHRSST-PP Data Processing Specification, GDS (Version 1 revision 1.5), GHRSST-PP Report Number 17. sea surface temperature data See: The Recommended GHRSST-PP Data Processing Specification, GDS (Version 1 revision 1.5), GHRSST-PP Report Number 17. 0.214 http://www.ifremer.fr/cersat/en/index.html Access Medspiration IFREMER / CERSAT site: http://www.ifremer.fr/cersat/en/index.html; some products may require authorization (restricted access) PC, Mac, Linux, Unix; standard Internet browser See URL at: http://www.ifremer.fr/cersat/en/index.html See URL at: http://www.ifremer.fr/cersat/en/index.html. Some products may have restricted access. Within 24 hours if directly downloaded, depending on size See Medspiration IFREMER / CERSAT website at URL: http://www.ifremer.fr/cersat/en/index.html Ability to work with netCDF files, working knowledge of satellite data strongly recommended 20050330 Unknown Present Unknown Edward Armstrong Jet Propulsion Laboratory (JPL), Physical Oceanography Distributed Active Archive Center (PO.DAAC) Technical Contact mailing address

4800 Oak Grove Dr.

Pasadena California 91109 USA 818 393 6710 818 393 2718 ghrsst@podaac.jpl.nasa.gov Standard Business hours, Pacific Time Phone/FAX/Email DSD-EUR-L2P-AVHRR17_L.xml JPL makes no warranty regarding these data, expressed or implied, nor does the fact of distribution constitute such a warranty. JPL cannot assume liability for any damages caused by any errors or omissions in these data, nor as a result of the failure of these data to function on a particular system. netCDF 2004-12-15 01:00:00 GHRSST formatted file (netCDF version 3); see: The Recommended GHRSST-PP Data Processing Specification, GDS (Version 1 revision 1.5), GHRSST-PP Report Number 17. sea surface temperature data See: The Recommended GHRSST-PP Data Processing Specification, GDS (Version 1 revision 1.5), GHRSST-PP Report Number 17. 0.214 ftp://podaac.jpl.nasa.gov/pub/sea_surface_temperature/GHRSST The direct FTP link is: ftp://podaac.jpl.nasa.gov/pub/sea_surface_temperature/GHRSST Data, documentation, and read software may also be downloaded through the JPL Global Data Assembly Center (GDAC) at: URL: http://ghrsst.jpl.nasa.gov/data_access.html For more information see the GDAC GHRSST project web site: URL: http://ghrsst.nasa.noaa.gov GHRSST products are generally only stored and available for a period of 30 days after satellite observation. After this time they can be acquired from the NOAA NODC. PC, Mac, Linux, Unix; standard Internet browser None See URL at: http:/ghrsst.jpl.nasa.gov . Some products may have restricted access. GHRSST products are available for a period of about 30 days after observation. After this time they can be acquired from the NOAA NODC. Within 24 hours if directly downloaded, depending on size Contact the PO.DAAC User Services Office: ghrsst@podaac.jpl.nasa.gov Ability to work with netCDF files, working knowledge of satellite data strongly recommended 20050330 Unknown Present Unknown 20060525-AVHRR17_L-EUR-L2P-mcsst_lac_n17_d20060525_s012000_e013100_b2034949_cnavo-v01.nc GHRSST Formatted netCDF data file The Recommended GHRSST-PP Data Processing Specification GDS (Version 1 revision 1.5), GHRSST-PP Report Number 17 Compiled by Craig Donlon and the GHRSST-PP Science Team craig.donlon@metoffice.com Published by the International GHRSST-PP Project Office Met Office Fitzroy Road Exeter, EX3 1PB United Kingdom Tel: +44 (0)1392 886622 Fax: +44 (0)1393 885681 Latitude Latitude in decimal degrees following FGDC specifications. Here, the Range Domain Minimum given below is equivalent to a South Bounding Coordinate for this Entity. The Range Domain Maximum is the North Bounding Coordinate. FGDC-STD-001-1998 26.940 51.640 20060525T012022Z 20060525T012716Z Longitude Longitude in decimal degrees following FGDC specifications. Here, the Range Domain Minimum given below is equivalent to a West Bounding Coordinate for this entity. The Range Domain Maximum is the East Bounding Coordinate. FGDC-STD-001-1998 -45.000 -40.310 20060525T012022Z 20060525T012716Z Time Universal Time (Greenwich Mean Time) values shall follow the 24 hour timekeeping system for Universal time of day in hours, minutes, and seconds, and decimal fractions of a second (expressed to the precision desired) without separators convention, with the upper case letter Z following the low order (or extreme right-hand) time element of the 24 hour hour time clock expression. The general form is HHMMSSSSZ. American Standards Institute, 1975, Representations of universal time, local time differentials, and United States time zone reference for information interchange (ANSI X3.51-1975): New York, American National Standards Institute. For usage in these data see: The Recommended GHRSST-PP Data Processing Specification GDS (Version 1 revision 1.5), GHRSST-PP Report Number 17 Canned text; no .DIF match 20060525T012022Z 20060525T012716Z 20060525T012022Z 20060525T012716Z 20060525-AVHRR17_L-EUR-L2P-mcsst_lac_n17_d20060525_s101400_e102000_b2035454_cnavo-v01.nc GHRSST Formatted netCDF data file The Recommended GHRSST-PP Data Processing Specification GDS (Version 1 revision 1.5), GHRSST-PP Report Number 17 Compiled by Craig Donlon and the GHRSST-PP Science Team craig.donlon@metoffice.com Published by the International GHRSST-PP Project Office Met Office Fitzroy Road Exeter, EX3 1PB United Kingdom Tel: +44 (0)1392 886622 Fax: +44 (0)1393 885681 Latitude Latitude in decimal degrees following FGDC specifications. Here, the Range Domain Minimum given below is equivalent to a South Bounding Coordinate for this Entity. The Range Domain Maximum is the North Bounding Coordinate. FGDC-STD-001-1998 41.220 45.050 20060525T101624Z 20060525T101752Z Longitude Longitude in decimal degrees following FGDC specifications. Here, the Range Domain Minimum given below is equivalent to a West Bounding Coordinate for this entity. The Range Domain Maximum is the East Bounding Coordinate. FGDC-STD-001-1998 -1.810 16.200 20060525T101624Z 20060525T101752Z Time Universal Time (Greenwich Mean Time) values shall follow the 24 hour timekeeping system for Universal time of day in hours, minutes, and seconds, and decimal fractions of a second (expressed to the precision desired) without separators convention, with the upper case letter Z following the low order (or extreme right-hand) time element of the 24 hour hour time clock expression. The general form is HHMMSSSSZ. American Standards Institute, 1975, Representations of universal time, local time differentials, and United States time zone reference for information interchange (ANSI X3.51-1975): New York, American National Standards Institute. For usage in these data see: The Recommended GHRSST-PP Data Processing Specification GDS (Version 1 revision 1.5), GHRSST-PP Report Number 17 Canned text; no .DIF match 20060525T101624Z 20060525T101752Z 20060525T101624Z 20060525T101752Z 20060525-AVHRR17_L-EUR-L2P-mcsst_lac_n17_d20060525_s194800_e195700_b2036060_cnavo-v01.nc GHRSST Formatted netCDF data file The Recommended GHRSST-PP Data Processing Specification GDS (Version 1 revision 1.5), GHRSST-PP Report Number 17 Compiled by Craig Donlon and the GHRSST-PP Science Team craig.donlon@metoffice.com Published by the International GHRSST-PP Project Office Met Office Fitzroy Road Exeter, EX3 1PB United Kingdom Tel: +44 (0)1392 886622 Fax: +44 (0)1393 885681 Latitude Latitude in decimal degrees following FGDC specifications. Here, the Range Domain Minimum given below is equivalent to a South Bounding Coordinate for this Entity. The Range Domain Maximum is the North Bounding Coordinate. FGDC-STD-001-1998 20.000 42.120 20060525T195130Z 20060525T195751Z Longitude Longitude in decimal degrees following FGDC specifications. Here, the Range Domain Minimum given below is equivalent to a West Bounding Coordinate for this entity. The Range Domain Maximum is the East Bounding Coordinate. FGDC-STD-001-1998 18.070 40.380 20060525T195130Z 20060525T195751Z Time Universal Time (Greenwich Mean Time) values shall follow the 24 hour timekeeping system for Universal time of day in hours, minutes, and seconds, and decimal fractions of a second (expressed to the precision desired) without separators convention, with the upper case letter Z following the low order (or extreme right-hand) time element of the 24 hour hour time clock expression. The general form is HHMMSSSSZ. American Standards Institute, 1975, Representations of universal time, local time differentials, and United States time zone reference for information interchange (ANSI X3.51-1975): New York, American National Standards Institute. For usage in these data see: The Recommended GHRSST-PP Data Processing Specification GDS (Version 1 revision 1.5), GHRSST-PP Report Number 17 Canned text; no .DIF match 20060525T195130Z 20060525T195751Z 20060525T195130Z 20060525T195751Z Within the GHRSST DIF-style metadata framework, every data set type is described by a static Data Set Description (DSD), and the individual netCDF files making up that dataset are described by dynamic File Records (FR). These FRs contain the spatial and temporal domain contained in each data file. The DIF-style metadata (the DSD and its children FRs) are converted to a single FGDC record for each NODC GHRSST accession, which can consist of several discrete data files. This conversion is accomplished using an XML stylesheet which builds a framework FGDC record based on the DSD, and populates it with one Entity for each data file based on the FRs. These Entities are given three Attributes: Latitude, Longitude, and Time. The Range Domain Minimum and Maximum elements within each of those Attributes are use to describe the spatial and temporal domain contained in the data file. So, for example, the Range Domain Minimum for the Attribute Latitude corresponds to a South Bounding Coordinate for that Entity. The Recommended GHRSST-PP Data Processing Specification GDS (Version 1 revision 1.5), GHRSST-PP Report Number 17 Compiled by Craig Donlon and the GHRSST-PP Science Team craig.donlon@metoffice.com Published by the International GHRSST-PP Project Office Met Office Fitzroy Road Exeter, EX3 1PB United Kingdom Tel: +44 (0)1392 886622 Fax: +44 (0)1393 885681 Metadata records converted to FGDC format and archived at the National Oceanographic Data Center 20060918 20060918 20070918 Dr. Kenneth Casey NOAA National Oceanographic Data Center Physical scientist mailing address

NOAA National Oceanographic Data Center SSMC3, 4th Floor, Room 4853, Route: E/OC1 1315 East-West Highway

Silver Spring Maryland 20910 U.S.A. (301)713-3300 FAX: (301) 713-3300 Kenneth.Casey@noaa.gov 9:00 AM-4:00 PM, EST Phone/FAX/E-mail/letter FGDC Content Standards for Digital Geospatial Metadata FGDC-STD-001-1998 local time None None None Unclassified Not applicable