gov.noaa.nodc:0111871 eng utf8 dataset NOAA National Centers for Environmental Information ncei.info@noaa.gov https://www.ncei.noaa.gov/contact HTTPS NOAA Contact Information Information for contacts at NCEI. information custodian 2026-03-24T18:42:45Z ISO 19115-2 Geographic Information - Metadata - Part 2: Extensions for Imagery and Gridded Data ISO 19115-2:2009(E) Quality Assurance statistics for AVHRR Pathfinder Version 5.2 L3-Collated (L3C) sea surface temperature in global and selected regions (NCEI Accession 0111871) 2014-10-09 publication 2013-08-09 creation NOAA National Centers for Environmental Information gov.noaa.nodc:0111871 NCEI Archive Management System 0111871 NOAA National Centers for Environmental Information ncei.info@noaa.gov https://www.ncei.noaa.gov/contact HTTPS NCEI Contact Information Information for contacts at NCEI. information publisher Yongsheng Zhang NOAA National Centers for Environmental Information (NCEI) yongsheng.zhang@noaa.gov resourceProvider US National Oceanographic Data Center (NODC) https://www.nodc.noaa.gov/ HTTPS US National Oceanographic Data Center (NODC) website Institution web page information resourceProvider US National Oceanographic Data Center (NODC) https://www.nodc.noaa.gov/ HTTPS US National Oceanographic Data Center (NODC) website Institution web page information contributor Zhang, Yongsheng NOAA National Centers for Environmental Information (NCEI) yongsheng.zhang@noaa.gov author US National Oceanographic Data Center https://www.nodc.noaa.gov/ HTTPS US National Oceanographic Data Center (NODC) website Institution web page information author tableDigital These quality monitoring data for Pathfinder Version 5.2 (PFV5.2) Sea Surface Temperature (SST) are based on the concept of a Rich Inventory developed by the Enterprise Data Systems Group at the National Geophysical Data Center (NGDC). The principal concept of a Rich Inventory is to calculate statistics for selected parameters in each data file, store them in a database, and make them available to users and managers of the archive. In PFV5.2, one data file is generated every 12 hours, i.e., daily and nightly. The following statistics are calculated in this quality monitoring accession: valid observation number, number of the observations with value over 3 times the standard deviation, the observed minimum, maximum, mean and median of each image. The above statistics are calculated for several different domains, e. g., global, tropics, middle and latitudes, and also for 22.5x22.5 (lon/lat) degree "chunks". This dataset is available to the public for a wide variety of uses including scientific research and analysis. completed historicalArchive NOAA National Centers for Environmental Information ncei.info@noaa.gov https://www.ncei.noaa.gov/contact HTTPS NCEI Contact Information Information for contacts at NCEI. information pointOfContact asNeeded https://www.ncei.noaa.gov/access/metadata/landing-page/bin/gfx?id=gov.noaa.nodc:0111871 Preview graphic PNG 0111871 NCEI ACCESSION NUMBER 2013-08-01 publication ICE - COVERAGE SEA SURFACE TEMPERATURE WIND SPEED WIND SPEED - AVERAGE theme NODC DATA TYPES THESAURUS AVHRR AVHRR-2 AVHRR-3 instrument NODC INSTRUMENT TYPES THESAURUS derived products satellite data surface measurements time series theme NODC OBSERVATION TYPES THESAURUS NOAA-10 NOAA-11 NOAA-12 NOAA-14 NOAA-16 NOAA-17 NOAA-18 NOAA-19 NOAA-7 NOAA-9 platform NODC PLATFORM NAMES THESAURUS US National Oceanographic Data Center dataCentre NODC COLLECTING INSTITUTION NAMES THESAURUS US National Oceanographic Data Center dataCentre NODC SUBMITTING INSTITUTION NAMES THESAURUS Pathfinder project NODC PROJECT NAMES THESAURUS World-Wide Distribution place NODC SEA AREA NAMES THESAURUS oceanography theme WMO_CategoryCode 2012-09-15 publication DOC/NOAA/NESDIS/NODC > National Oceanographic Data Center, NESDIS, NOAA, U.S. Department of Commerce dataCentre Global Change Master Directory (GCMD) Data Center Keywords 2026 revision 23 Earth Science Data and Information System, Earth Science Projects Division, Goddard Space Flight Center (GSFC), National Aeronautics and Space Administration (NASA) Greenbelt MD https://forum.earthdata.nasa.gov/app.php/tag/GCMD%2BKeywords HTTPS GCMD Keyword Forum Page Global Change Master Directory (GCMD). 2025. GCMD Keywords, Version 21. Greenbelt, MD: Earth Science Data and Information System, Earth Science Projects Division, Goddard Space Flight Center (GSFC), National Aeronautics and Space Administration (NASA). URL (GCMD Keyword Forum Page): https://forum.earthdata.nasa.gov/app.php/tag/GCMD+Keywords information custodian NOAA/NASA PATHFINDER > NOAA/NASA Pathfinder Program project Global Change Master Directory (GCMD) Project Keywords 2026 revision 23 Earth Science Data and Information System, Earth Science Projects Division, Goddard Space Flight Center (GSFC), National Aeronautics and Space Administration (NASA) Greenbelt MD https://forum.earthdata.nasa.gov/app.php/tag/GCMD%2BKeywords HTTPS GCMD Keyword Forum Page Global Change Master Directory (GCMD). 2025. GCMD Keywords, Version 21. Greenbelt, MD: Earth Science Data and Information System, Earth Science Projects Division, Goddard Space Flight Center (GSFC), National Aeronautics and Space Administration (NASA). URL (GCMD Keyword Forum Page): https://forum.earthdata.nasa.gov/app.php/tag/GCMD+Keywords information custodian EARTH SCIENCE > ATMOSPHERE > ATMOSPHERIC WINDS > SURFACE WINDS > WIND SPEED EARTH SCIENCE > OCEANS > OCEAN TEMPERATURE > SEA SURFACE TEMPERATURE EARTH SCIENCE > OCEANS > SEA ICE > ICE EXTENT theme Global Change Master Directory (GCMD) Science Keywords 2026 revision 23 Earth Science Data and Information System, Earth Science Projects Division, Goddard Space Flight Center (GSFC), National Aeronautics and Space Administration (NASA) Greenbelt MD https://forum.earthdata.nasa.gov/app.php/tag/GCMD%2BKeywords HTTPS GCMD Keyword Forum Page Global Change Master Directory (GCMD). 2025. GCMD Keywords, Version 21. Greenbelt, MD: Earth Science Data and Information System, Earth Science Projects Division, Goddard Space Flight Center (GSFC), National Aeronautics and Space Administration (NASA). URL (GCMD Keyword Forum Page): https://forum.earthdata.nasa.gov/app.php/tag/GCMD+Keywords information custodian AVHRR > Advanced Very High Resolution Radiometer AVHRR-2 > Advanced Very High Resolution Radiometer-2 AVHRR-3 > Advanced Very High Resolution Radiometer-3 instrument Global Change Master Directory (GCMD) Instrument Keywords 2026 revision 23 Earth Science Data and Information System, Earth Science Projects Division, Goddard Space Flight Center (GSFC), National Aeronautics and Space Administration (NASA) Greenbelt MD https://forum.earthdata.nasa.gov/app.php/tag/GCMD%2BKeywords HTTPS GCMD Keyword Forum Page Global Change Master Directory (GCMD). 2025. GCMD Keywords, Version 21. Greenbelt, MD: Earth Science Data and Information System, Earth Science Projects Division, Goddard Space Flight Center (GSFC), National Aeronautics and Space Administration (NASA). URL (GCMD Keyword Forum Page): https://forum.earthdata.nasa.gov/app.php/tag/GCMD+Keywords information custodian NOAA-10 > National Oceanic & Atmospheric Administration-10 NOAA-11 > National Oceanic & Atmospheric Administration-11 NOAA-12 > National Oceanic & Atmospheric Administration-12 NOAA-14 > National Oceanic & Atmospheric Administration-14 NOAA-16 > National Oceanic & Atmospheric Administration-16 NOAA-17 > National Oceanic & Atmospheric Administration-17 NOAA-18 > National Oceanic & Atmospheric Administration-18 NOAA-19 > National Oceanic & Atmospheric Administration-19 NOAA-7 > National Oceanic & Atmospheric Administration-7 NOAA-9 > National Oceanic & Atmospheric Administration-9 platform Global Change Master Directory (GCMD) Platform Keywords 2026 revision 23 Earth Science Data and Information System, Earth Science Projects Division, Goddard Space Flight Center (GSFC), National Aeronautics and Space Administration (NASA) Greenbelt MD https://forum.earthdata.nasa.gov/app.php/tag/GCMD%2BKeywords HTTPS GCMD Keyword Forum Page Global Change Master Directory (GCMD). 2025. GCMD Keywords, Version 21. Greenbelt, MD: Earth Science Data and Information System, Earth Science Projects Division, Goddard Space Flight Center (GSFC), National Aeronautics and Space Administration (NASA). URL (GCMD Keyword Forum Page): https://forum.earthdata.nasa.gov/app.php/tag/GCMD+Keywords information custodian NOAA-10 (ICES code: 3100, 1986-2001) NOAA-11 (ICES code: 3101, 1988-2004) NOAA-12 (ICES code: 3207, 1991-2007) NOAA-14 (ICES code: 3277, 1994-2007) NOAA-16 (ICES code: 33J9, 2000-2014) NOAA-17 (ICES code: 33ZS, 2002-2013) NOAA-18 (ICES code: 33WM, 2005-2016) NOAA-19 (ICES code: 33Y9, 2009-2016) NOAA-7 (ICES code: 33V2, 1981-1986) NOAA-9 (ICES code: 33OO, 1984-1998) platform ICES/SeaDataNet Ship Codes GEOGRAPHIC REGION > GLOBAL OCEAN place Global Change Master Directory (GCMD) Location Keywords 2026 revision 23 Earth Science Data and Information System, Earth Science Projects Division, Goddard Space Flight Center (GSFC), National Aeronautics and Space Administration (NASA) Greenbelt MD https://forum.earthdata.nasa.gov/app.php/tag/GCMD%2BKeywords HTTPS GCMD Keyword Forum Page Global Change Master Directory (GCMD). 2025. GCMD Keywords, Version 21. Greenbelt, MD: Earth Science Data and Information System, Earth Science Projects Division, Goddard Space Flight Center (GSFC), National Aeronautics and Space Administration (NASA). URL (GCMD Keyword Forum Page): https://forum.earthdata.nasa.gov/app.php/tag/GCMD+Keywords information custodian accessLevel: Public otherRestrictions Cite as: Zhang, Yongsheng; US National Oceanographic Data Center (2014). Quality Assurance statistics for AVHRR Pathfinder Version 5.2 L3-Collated (L3C) sea surface temperature in global and selected regions (NCEI Accession 0111871). [indicate subset used]. NOAA National Centers for Environmental Information. Dataset. https://www.ncei.noaa.gov/archive/accession/0111871. Accessed [date]. Distribution liability: NOAA and NCEI make no warranty, expressed or implied, regarding these data, nor does the fact of distribution constitute such a warranty. NOAA and NCEI cannot assume liability for any damages caused by any errors or omissions in these data. If appropriate, NCEI can only certify that the data it distributes are an authentic copy of the records that were accepted for inclusion in the NCEI archives. otherRestrictions Use liability: NOAA and NCEI cannot provide any warranty as to the accuracy, reliability, or completeness of furnished data. Users assume responsibility to determine the usability of these data. The user is responsible for the results of any application of this data for other than its intended purpose. Casey, Kenneth S.; Evans, Robert H.; Baringer, Warner; Kilpatrick, Katherine A.; Podestá, Guillermo P.; Walsh, Susan; Williams, Elizabeth; Brandon, Tess B.; Byrne, Deirdre A.; Foti, Gregg; Li, Yuanjie; Phillips, Sheri A.; Zhang, Dexin; Zhang, Yongsheng (2011). AVHRR Pathfinder version 5.2 level 3 collated (L3C) global 4km sea surface temperature for 1981-2012. NOAA National Centers for Environmental Information. Dataset. https://doi.org/10.7289/v5wd3xhb. 2011-03-08 publication International DOI Foundation (IDF) https://doi.org/10.7289/v5wd3xhb NOAA National Centers for Environmental Information gov.noaa.nodc:AVHRR_Pathfinder-NODC-L3C-v5.2 https://doi.org/10.7289/v5wd3xhb HTTPS https://doi.org/10.7289/v5wd3xhb Related dataset information Casey, Kenneth S. US National Oceanographic Data Center https://www.nodc.noaa.gov/ HTTPS US National Oceanographic Data Center (NODC) website Institution web page information author Evans, Robert H. University of Miami, Rosenstiel School of Marine and Atmospheric Science http://www.miami.edu/ HTTP University of Miami (UM) website Institution web page information author Baringer, Warner University of Miami, Rosenstiel School of Marine and Atmospheric Science http://www.miami.edu/ HTTP University of Miami (UM) website Institution web page information author Kilpatrick, Katherine A. University of Miami, Rosenstiel School of Marine and Atmospheric Science http://www.miami.edu/ HTTP University of Miami (UM) website Institution web page information author Podestá, Guillermo P. University of Miami, Rosenstiel School of Marine and Atmospheric Science http://www.miami.edu/ HTTP University of Miami (UM) website Institution web page information author Walsh, Susan University of Miami, Rosenstiel School of Marine and Atmospheric Science http://www.miami.edu/ HTTP University of Miami (UM) website Institution web page information author Williams, Elizabeth University of Miami, Rosenstiel School of Marine and Atmospheric Science http://www.miami.edu/ HTTP University of Miami (UM) website Institution web page information author Brandon, Tess B. US National Oceanographic Data Center https://www.nodc.noaa.gov/ HTTPS US National Oceanographic Data Center (NODC) website Institution web page information author Byrne, Deirdre A. US National Oceanographic Data Center https://www.nodc.noaa.gov/ HTTPS US National Oceanographic Data Center (NODC) website Institution web page information author Foti, Gregg US National Oceanographic Data Center https://www.nodc.noaa.gov/ HTTPS US National Oceanographic Data Center (NODC) website Institution web page information author Li, Yuanjie US National Oceanographic Data Center https://www.nodc.noaa.gov/ HTTPS US National Oceanographic Data Center (NODC) website Institution web page information author Phillips, Sheri A. US National Oceanographic Data Center https://www.nodc.noaa.gov/ HTTPS US National Oceanographic Data Center (NODC) website Institution web page information author Zhang, Dexin US National Oceanographic Data Center https://www.nodc.noaa.gov/ HTTPS US National Oceanographic Data Center (NODC) website Institution web page information author Zhang, Yongsheng US National Oceanographic Data Center https://www.nodc.noaa.gov/ HTTPS US National Oceanographic Data Center (NODC) website Institution web page information author NOAA National Centers for Environmental Information (NCEI) publisher tableDigital crossReference collection eng; USA utf8 environment oceans climatologyMeteorologyAtmosphere -180 180 -90 90 1981-11-01 2012-12-31 NOAA National Centers for Environmental Information +1-301-713-3277 ncei.info@noaa.gov pointOfContact In most cases, electronic downloads of the data are free. However, fees may apply for custom orders, data certifications, copies of analog materials, and data distribution on physical media. Contact NCEI for other distribution options and instructions. Originator data format 520.296 https://www.ncei.noaa.gov/archive/accession/0111871 HTTPS Web browser NCEI Dataset Landing Page Navigate directly to the URL for a descriptive web page with download links. information https://www.ncei.noaa.gov/archive/accession/oas/111871 HTTPS Web browser Descriptive Information Navigate directly to the URL for a descriptive web page with download links. information https://www.ncei.noaa.gov/archive/accession/download/111871 HTTPS Web browser HTTPS Navigate directly to the URL for data access and direct download. download ftp://ftp-oceans.ncei.noaa.gov/nodc/archive/arc0070/0111871/ FTP Any FTP client FTP These data are available through the File Transfer Protocol (FTP). FTP is no longer supported by most internet browsers. You may copy and paste the FTP link to the data into an FTP client (e.g., FileZilla or WinSCP). download dataset NCEI Accession 0111871 v1.1 was published. 2014-10-09T16:30:15Z NCEI Accession 0111871 v1.1 publication https://www.ncei.noaa.gov/archive/accession/0111871/1.1 HTTPS NCEI Accession 0111871 v1.1 published 2014-10-09T16:30:15Z download repository NOAA National Centers for Environmental Information NOAA created the National Centers for Environmental Information (NCEI) by merging NOAA's National Climatic Data Center (NCDC), National Geophysical Data Center (NGDC), and National Oceanographic Data Center (NODC), including the National Coastal Data Development Center (NCDDC), per the Consolidated and Further Continuing Appropriations Act, 2015, Public Law 113-235. NCEI launched publicly on April 22, 2015. 2015-04-22T00:00:00 asNeeded Metadata are developed, maintained and distributed by NCEI. Updates are performed as needed to maintain currentness. NOAA National Centers for Environmental Information custodian AVHRR AVHRR Advanced Very High Resolution Radiometer A meteorological satellite [instrument] with two bands that is used for large area Earth observation at 1 km spatial resolution. Source: Glossary of GIS and Remote Sensing Terms, University of Vermont. (http://fwie.fw.vt.edu/tws-gis/glossary.htm; last accessed on 09/22/2004). Specifically, this instrument type is to be used to represent AVHRR/1: "There are two series of AVHRR instruments. Built by ITT Aerospace/Optical Division in the mid 1970s, the AVHRR/1 is a four-channel, filter-wheel spectrometer/radiometer (Appendix) while the AVHRR/2, built in the early 1980s, is identical except for the addition of Channel 5." See https://www.ngdc.noaa.gov/ecosys/cdroms/AVHRR97_d1/avhrr3.htm AVHRR-2 AVHRR-2 Advanced Very High Resolution Radiometer-2 The AVHRR-2 is a multi purpose imaging instrument used for global measurement of cloud cover, sea surface temperature, ice, snow and vegetation cover and characteristics. This instrument was initially carried on NOAA-7 (launched June 1981) and was last flown on NOAA-14 which was decommissioned in 2005. This 5-channel radiometer covering 2 visible and 3 thermal infrared between 0.63 and 12.0 micrometers, has an instantaneous footprint of 1.1 km at the sub satellite point. Additional Information: https://nwpsaf.eu/deliverables/aapp/avhrr_2.html AVHRR-3 AVHRR-3 Advanced Very High Resolution Radiometer-3 The AVHRR-3 is a six channel scanning radiometer providing 3 solar channels in the visible-near infrared region and 3 thermal infrared channels. The AVHRR-3 has two one-micrometer wide channels between 10.3 and 12.5 micrometers. This latest version of AVHRR was first carried on NOAA-15 launched in May 1998 and subsequently in all current NOAA and MetOp platforms. Measuring the same view, this array of diverse wavelengths, after processing, permits multi spectral analysis for more precisely defining hydrologic, oceanographic, and meteorological parameters. Comparison of data from two channels is often used to observe features or measure various environmental parameters. The three channels operating entirely within the infrared band are used to detect the heat radiation from and hence, the temperature of land, water, sea surfaces, and the clouds above them. Additional Information: http://www.ncdc.noaa.gov/oa/pod-guide/ncdc/docs/klm/html/c3/sec3-1.htm NOAA-10 https://www.wmo-sat.info/oscar/satellites/view/332 Instruments: AVHRR et al NOAA-11 https://www.wmo-sat.info/oscar/satellites/view/333 Instruments: AVHRR/2 et al NOAA-12 https://www.wmo-sat.info/oscar/satellites/view/334 Instruments: AVHRR/2 et al NOAA-14 https://www.wmo-sat.info/oscar/satellites/view/336 Instruments: AVHRR/2 et al NOAA-16 Updated information from ICES for the platform NOAA-16 from United States. Name NOAA-16 Country(s) US: UNITED STATES Platform Class 65: Orbiting satellite Native Name Synonyms Call Sign MMSI IMO Pennant Title Commissioned Date 2000 Decommissioned Date 2014 Notes Polar-orbiting environmental satellite launched September 2000. The NODC has archived AVHRR SST data collected from this platform as part of the Pathfinder project. Instruments: AVHRR/3 et al Information Source (URL) https://www.wmo-sat.info/oscar/satellites/view/338 Confirmed by NOAA on 2018-07-17. NOAA-17 Updated information from ICES for the platform NOAA-17 from United States. Name NOAA-17 Country(s) US: UNITED STATES Platform Class 65: Orbiting satellite Native Name Synonyms Call Sign MMSI IMO Pennant Title Commissioned Date 2002 Decommissioned Date 2013 Notes Polar-orbiting environmental satellite launched June 2002. The NODC has archived AVHRR SST data collected from this platform as part of the Pathfinder project. Instruments: AVHRR/3 et al Information source (URL) https://www.wmo-sat.info/oscar/satellites/view/339 Confirmed by NOAA on 2018-07-17. NOAA-18 Updated information from ICES for the platform NOAA-18 from United States. Name NOAA-18 Country(s) US: UNITED STATES Platform Class 65: Orbiting satellite Native Name Synonyms Call Sign MMSI IMO Pennant Title Commissioned Date 2005 Decommissioned Date 2016 Notes Polar-orbiting environmental satellite launched May 2005 as NOAA-N. The NODC has archived AVHRR SST data collected from this platform as part of the Pathfinder project. Instruments: AVHRR/3 et al Information source (URL) https://www.wmo-sat.info/oscar/satellites/view/340 Confirmed by NOAA on 2018-07-17. NOAA-19 Updated information from ICES for the platform NOAA-15 from United States. Name NOAA-19 Country(s) US: UNITED STATES Platform Class 65: Orbiting satellite Native Name Synonyms Call Sign MMSI IMO Pennant Title Commissioned Date 2009 Decommissioned Date 2016 Notes Polar-orbiting environmental satellite launched February 2009 as NOAA-N Prime. The NODC has archived AVHRR SST data collected from this platform as part of the Group for High Resolution Sea Surface Temperature (GHRSST) Project. Additional information: Main body: 4.2m (13.75 ft) long, 1.88m (6.2 ft) diameter Solar array: 2.73m (8.96 ft) by 6.14m (20.16 ft) Weight at Liftoff: 1419.8 kg (3130 pounds) including 4.1 kg of gaseous nitrogen Launch Vehicle: Delta-II 7320-10 Space Launch Vehicle Launch Date: February 06, 2009 Vandenburg Air Force Base, CA Orbital information: Type: sun synchronous Altitude: 870 km Period: 102.14 minutes Inclination: 98.730 degrees Sensors: Advanced Very High Resolution Radiometer (AVHRR/3) Advanced Microwave Sounding Unit-A (AMSU-A) Microwave Humidity Sounder (MHS) High Resolution Infrared Radiation Sounder (HIRS/4) Solar Backscatter Ultraviolet Spectral radiometer (SBUV/2) Space Environment Monitor (SEM/2) Search and Rescue (SAR) Repeater and Processor Advance Data Collection System (ADCS) Information source (URL) https://www.wmo-sat.info/oscar/satellites/view/341 http://noaasis.noaa.gov/NOAASIS/ml/genlsatl.html Confirmed by NOAA on 2018-07-17. NOAA-7 Updated information from ICES for the platform NOAA-7 from UNITED STATES. Name NOAA-7 Country(s) US: UNITED STATES Platform Class 65: Orbiting satellite Commissioned Date 1981-06-23 Decommissioned Date 1986-06-07 Notes Selected global data available from NOAA. Significant contribution to Space weather and operational meteorology. Information source (URL) https://www.wmo-sat.info/oscar/satellites/view/329 All known Instruments flying on NOAA-7 Acronym - Full name Argos - Argos Data Collection System AVHRR/2 - Advanced Very High Resolution Radiometer / 2 HIRS/2 - High-resolution Infra Red Sounder / 2 MSU - Microwave Sounding Unit SSU - Stratospheric Sounding Unit SEM/MEPED - SEM / Medium energy proton detector SEM/TED - SEM / Total Energy Detector Submitted to ICES on 2018-07-17. Confirmed by NOAA on 2018-08-08. NOAA-9 Updated information from ICES for the platform NOAA-9 from UNITED STATES. Name NOAA-9 Country(s) US: UNITED STATES Platform Class 65: Orbiting satellite Confirmed by NOAA on 2018-08-08. Commissioned Date 1984-12-12 Decommissioned Date 1998-02-13 Notes Selected global operational meteorology data available from NOAA. Significant contribution to Atmospheric chemistry and Space weather. All known Instruments flying on NOAA-9 Acronym - Full name Argos - Argos Data Collection System AVHRR/2 - Advanced Very High Resolution Radiometer / 2 ERBE - Earth Radiation Budget Experiment HIRS/2 - High-resolution Infra Red Sounder / 2 MSU - Microwave Sounding Unit S&RSAT - Search & Rescue Satellite-Aided Tracking System SBUV/2 - Solar Backscatter Ultraviolet / 2 SSU - Stratospheric Sounding Unit SEM/MEPED - SEM / Medium energy proton detector SEM/TED - SEM / Total Energy Detector Information source (URL) https://www.wmo-sat.info/oscar/satellites/view/331 Submitted to ICES on 2018-07-17. Confirmed by NOAA on 2018-08-08.