gov.noaa.ncdc:C00961 eng; USA utf8 dataset NOAA National Centers for Environmental Information ncei.info@noaa.gov https://www.ncei.noaa.gov/contact NCEI Contact Information Information for contacts at NCEI. information pointOfContact 2026-01-16T17:23:52 ISO 19115-2 Geographic Information - Metadata - Part 2: Extensions for Imagery and Gridded Data ISO 19115-2:2009(E) NOAA Climate Data Record (CDR) of MSU and AMSU-A Mean Layer Temperatures, UAH Version 6.0 Mean Layer Temperature - UAH 2017-06-19 publication Version 6.0 doi:10.7289/V5MC8X31 NCEI DSI 3688_02 gov.noaa.ncdc:C00961 Access Identifier mean-layer-temperature-uah Christy, John R. Earth System Science Center, University of Alabama in Huntsville principalInvestigator Christy, John R. Earth System Science Center, University of Alabama in Huntsville author Spencer, Roy W. Earth System Science Center, University of Alabama in Huntsville principalInvestigator Spencer, Roy W. Earth System Science Center, University of Alabama in Huntsville author Braswell, William D. Earth System Science Center, University of Alabama in Huntsville collaborator Braswell, William D. Earth System Science Center, University of Alabama in Huntsville author Doty, Kevin G. Earth System Science Center, University of Alabama in Huntsville collaborator Doty, Kevin G. Earth System Science Center, University of Alabama in Huntsville author NOAA CDR Program collaborator NOAA CDR Program author DOC/NOAA/NESDIS/NCEI > National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce publisher DOC/NOAA/NESDIS/NCDC > National Climatic Data Center, NESDIS, NOAA, U.S. Department of Commerce publisher imageDigital This dataset includes monthly gridded temperature anomalies on a global 2.5 x 2.5 degree grid derived from Microwave Sounding Unit (MSU) and Advanced Microwave Sounding Unit (AMSU) radiance data since December 1978. In addition, there are monthly regional anomalies and monthly mean annual cycle temperatures. All products are derived for four bulk layers of the atmosphere: the Lower Troposphere (TLT), Mid-Troposphere (TMT), Tropopause (TTP) and Lower Stratosphere (TLS). Version 6.0 is the latest UAH version archived at NOAA and is updated monthly. It utilizes the linear calibration equation with hot-target correction for the MSU series (TIROS-N through NOAA-14) rather than other non-linear calibration equations. Gridded values of absolute temperature are calculated from a polynomial fit in the vertical coordinate of all view angle temperatures binned into each grid over a month. The selected temperature is calculated from a prescribed view-angle where it intersects the polynomial fit of the temperature vs. view-angle relationship or each grid. The diurnal adjustment is completely empirical, calculated by comparing a diurnally-drifting spacecraft against one that is not drifting during their overlap comparison period (for a.m. spacecraft, NOAA-15 vs. (non-drifting) AQUA, and for p.m., NOAA-18 vs. (non-drifting) NOAA-19 during 4 years). The calculated diurnal relationship of temperature change vs. time of day is then applied to all drifting satellites. The Lower Troposphere is calculated from a linear combination of TMT, TTP and TLS rather than from a linear combination of view-angles from the single channel (MSU2 or AMSU5) as was done in versions 5.6 and earlier. A new bulk layer centered on the Tropopause was added in version 6.0. These products were converted from the native text file format to netCDF-4 following CF metadata conventions, and they are accompanied by algorithm documentation, data flow diagram and source code for the NOAA CDR Program. The Climate Data Record (CDR) of mean atmospheric layer temperature from MSU/AMSU-A is used for detection of possible trends in greenhouse warming, evaluation of computer models of climate change, and for understanding important factors in the climate system. DOC/NOAA/NESDIS/NCEI > National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce NOAA Climate Data Record Program Office +1 (828) 271-4800 +1 (828) 271-4328 151 Patton Avenue Veach-Baley Federal Building, Room 447 Asheville NC 28801-5001 USA uah_msu_contacts@noaa.gov https://www.ncei.noaa.gov/products/climate-data-records HTTPS Web Browser CDR Program Contacts Contact information for the CDR Program. information 8:00 - 6:00 Eastern pointOfContact monthly https://www.ncei.noaa.gov/pub/data/metadata/images/C00961_Image_MLT_UAH.png Image of Brightness Temperature Anomalies in the Lower Troposphere for 2012. PNG Earth Science > Spectral/Engineering > Microwave > Brightness Temperature Earth Science > Spectral/Engineering > Microwave > Temperature Anomalies theme Global Change Master Directory (GCMD) Science Keywords 2018 revision Version 8.6 Global Change Data Center, Science and Exploration Directorate, Goddard Space Flight Center (GSFC) National Aeronautics and Space Administration (NASA) https://earthdata.nasa.gov/about/gcmd/global-change-master-directory-gcmd-keywords HTTPS Web Browser Global Change Master Directory (GCMD) Keywords The information provided on this page seeks to define how the GCMD Keywords are structured, used and accessed. It also provides information on how users can participate in the further development of the keywords. information publisher TIROS-N > Television Infrared Observation Satellite-N NOAA-6 > National Oceanic & Atmospheric Administration - 6 NOAA-7 > National Oceanic & Atmospheric Administration - 7 NOAA-8 > National Oceanic & Atmospheric Administration - 8 NOAA-9 > National Oceanic & Atmospheric Administration - 9 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-15 > National Oceanic & Atmospheric Administration - 15 NOAA-18 > National Oceanic & Atmospheric Administration - 18 NOAA-19 > National Oceanic & Atmospheric Administration - 19 AQUA > Earth Observing System, AQUA platform Global Change Master Directory (GCMD) Platform Keywords 2018 revision Version 8.6 Global Change Data Center, Science and Exploration Directorate, Goddard Space Flight Center (GSFC) National Aeronautics and Space Administration (NASA) https://earthdata.nasa.gov/about/gcmd/global-change-master-directory-gcmd-keywords HTTPS Web Browser Global Change Master Directory (GCMD) Keywords The information provided on this page seeks to define how the GCMD Keywords are structured, used and accessed. It also provides information on how users can participate in the further development of the keywords. information publisher AMSU-A > Advanced Microwave Sounding Unit-A MSU > Microwave Sounding Unit instrument Global Change Master Directory (GCMD) Instrument Keywords 2018 revision Version 8.6 Global Change Data Center, Science and Exploration Directorate, Goddard Space Flight Center (GSFC) National Aeronautics and Space Administration (NASA) https://earthdata.nasa.gov/about/gcmd/global-change-master-directory-gcmd-keywords HTTPS Web Browser Global Change Master Directory (GCMD) Keywords The information provided on this page seeks to define how the GCMD Keywords are structured, used and accessed. It also provides information on how users can participate in the further development of the keywords. information publisher Geographic Region > Global place Global Change Master Directory (GCMD) Location Keywords 2018 revision Version 8.6 Global Change Data Center, Science and Exploration Directorate, Goddard Space Flight Center (GSFC) National Aeronautics and Space Administration (NASA) https://earthdata.nasa.gov/about/gcmd/global-change-master-directory-gcmd-keywords HTTPS Web Browser Global Change Master Directory (GCMD) Keywords The information provided on this page seeks to define how the GCMD Keywords are structured, used and accessed. It also provides information on how users can participate in the further development of the keywords. information publisher Vertical Location > Stratosphere Vertical Location > Troposphere stratum Global Change Master Directory (GCMD) Location Keywords 2018 revision Version 8.6 Global Change Data Center, Science and Exploration Directorate, Goddard Space Flight Center (GSFC) National Aeronautics and Space Administration (NASA) https://earthdata.nasa.gov/about/gcmd/global-change-master-directory-gcmd-keywords HTTPS Web Browser Global Change Master Directory (GCMD) Keywords The information provided on this page seeks to define how the GCMD Keywords are structured, used and accessed. It also provides information on how users can participate in the further development of the keywords. information publisher NOAA OneStop Project project Global Change Master Directory (GCMD) Project Keywords 2018 revision Version 8.6 Global Change Data Center, Science and Exploration Directorate, Goddard Space Flight Center (GSFC) National Aeronautics and Space Administration (NASA) https://earthdata.nasa.gov/about/gcmd/global-change-master-directory-gcmd-keywords HTTPS Web Browser Global Change Master Directory (GCMD) Keywords The information provided on this page seeks to define how the GCMD Keywords are structured, used and accessed. It also provides information on how users can participate in the further development of the keywords. information publisher DOC/NOAA/NESDIS/NCEI > National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce DOC/NOAA/NESDIS/NCDC > National Climatic Data Center, NESDIS, NOAA, U.S. Department of Commerce dataCentre Global Change Master Directory (GCMD) Data Center Keywords 2018 revision Version 8.6 Global Change Data Center, Science and Exploration Directorate, Goddard Space Flight Center (GSFC) National Aeronautics and Space Administration (NASA) https://earthdata.nasa.gov/about/gcmd/global-change-master-directory-gcmd-keywords HTTPS Web Browser Global Change Master Directory (GCMD) Keywords The information provided on this page seeks to define how the GCMD Keywords are structured, used and accessed. It also provides information on how users can participate in the further development of the keywords. information publisher See the Algorithm Theoretical Basis Document for a description of use limitations. otherRestrictions Cite this dataset when used as a source. John R. Christy, Roy W. Spencer, William D. Braswell, Kevin G. Doty, and NOAA CDR Program (2017): NOAA Climate Data Record (CDR) of MSU and AMSU-A Mean Layer Temperatures, UAH Version 6.0. [indicate subset used]. NOAA National Centers for Environmental Information. doi:10.7289/V5MC8X31 [access date]. otherRestrictions Publications using this dataset should also reference the following journal article: Spencer, R. W., Christy, J. R., & Braswell, W. D. (2017, February). UAH Version 6 global satellite temperature products: Methodology and results. Asia-Pacific Journal of Atmospheric Sciences. Springer Nature. https://doi.org/10.1007/s13143-017-0010-y otherRestrictions See the Use Agreement for this CDR available on the CDR page. otherRestrictions 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. Data Stewardship Maturity Report for NOAA Climate Data Record (CDR) of MSU and AMSU-A Mean Layer Temperatures, UAH Version 6.0 2022 publication NOAA Institutional Repository publisher https://doi.org/10.25923/hb4b-m881 HTTPS Web Browser DSMR Publication at the NOAA Institutional Repository Report documenting the Scientific Data Stewardship Maturity for this dataset. information crossReference sciencePaper UAH Version 6 global satellite temperature products: Methodology and results 2017-02-01 publication Spencer, Roy W. author Christy, John R. author Braswell, William D. author Korean Meteorological Society (KMS) publisher https://doi.org/10.1007/s13143-017-0010-y HTTPS Web Browser Journal article published February 2017 in the Asia-Pacific Journal of Atmospheric Sciences Spencer, R. W., Christy, J. R., & Braswell, W. D. (2017, February). UAH Version 6 global satellite temperature products: Methodology and results. Asia-Pacific Journal of Atmospheric Sciences. Springer Nature. https://doi.org/10.1007/s13143-017-0010-y information crossReference sciencePaper Other publications that cite this dataset https://scholar.google.com/scholar?q=10.7289/V5MC8X31+OR+10.1007/s13143-017-0010-y HTTPS Web Browser Google Scholar search results Search results for publications that cite this dataset by its DOI(s). information crossReference project NOAA Climate Data Record (CDR) of MSU and AMSU-A Mean Layer Temperatures, UAH Version 5.4 (Superseded) 2011-09-29 publication Version 5.4 DOC/NOAA/NESDIS/NCEI > National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce publisher https://www.ncei.noaa.gov/metadata/geoportal/rest/metadata/item/gov.noaa.ncdc:C00806/html HTTPS Web Browser NCEI landing page for the Version 5.4 dataset Superseded dataset landing page. information crossReference project grid eng; USA climatologyMeteorologyAtmosphere -180.0 180.0 -90.0 90.0 1978-12-01 2023-03-31 1 uah_mlt_tls_v06r00_monacg_s19810101_e20101231_cYYYYMMDD.nc physicalMeasurement lon float longitude (longitude) lat float latitude (latitude) lon_bounds float lat_bounds float time short time (time) time_bounds short ac_ls float NOAA Climate Data Record of mean annual cycle of microwave brightness temperature in the lower stratosphere (brightness_temperature) uah_mlt_tls_v06r00_monreg_s19781201_eYYYYMMDD_cYYYYMMDD.nc physicalMeasurement region char region (region) time short time (time) time_bounds short regional_bt_anomaly_ls float NOAA Climate Data Record of regional monthly anomaly for lower stratosphere microwave brightness temperature (brightness_temperature_anomaly) regional_bt_anomaly_ls_trends float Trends of NOAA Climate Data Record of regional monthly anomaly for lower stratosphere microwave brightness temperature (brightness_temperature_anomaly_trends) uah_mlt_tls_v06r00_monamg_s19781201_eYYYYMMDD_cYYYYMMDD.nc physicalMeasurement lon float longitude (longitude) lat float latitude (latitude) lon_bounds float lat_bounds float time short time (time) time_bounds short bt_anomaly_ls float NOAA Climate Data Record of monthly anomaly for lower stratosphere microwave brightness temperature (brightness_temperature_anomaly) uah_mlt_tlt_v06r00_monacg_s19810101_e20101231_cYYYYMMDD.nc physicalMeasurement lon float longitude (longitude) lat float latitude (latitude) lon_bounds float lat_bounds float time short time (time) time_bounds short ac_lt float NOAA Climate Data Record of mean annual cycle of microwave brightness temperature in the lower troposphere (brightness_temperature) uah_mlt_tlt_v06r00_monamg_s19781201_eYYYYMMDD_cYYYYMMDD.nc physicalMeasurement lon float longitude (longitude) lat float latitude (latitude) lon_bounds float lat_bounds float time short time (time) time_bounds short bt_anomaly_lt float NOAA Climate Data Record of monthly anomaly for lower tropospheric microwave brightness temperature (brightness_temperature_anomaly) uah_mlt_tlt_v06r00_monreg_s19781201_eYYYYMMDD_cYYYYMMDD.nc physicalMeasurement region char region (region) time short time (time) time_bounds short regional_bt_anomaly_lt float NOAA Climate Data Record of regional monthly anomaly for lower tropospheric microwave brightness temperature (brightness_temperature_anomaly) regional_bt_anomaly_lt_trends float Trends of NOAA Climate Data Record of regional monthly anomaly for lower tropospheric microwave brightness temperature (brightness_temperature_anomaly_trends) uah_mlt_tmt_v06r00_monacg_s19810101_e20101231_cYYYYMMDD.nc physicalMeasurement lon float longitude (longitude) lat float latitude (latitude) lon_bounds float lat_bounds float time short time (time) time_bounds short ac_mt float NOAA Climate Data Record of mean annual cycle of microwave brightness temperature in the middle troposphere (brightness_temperature) uah_mlt_tmt_v06r00_monreg_s19781201_eYYYYMMDD_cYYYYMMDD.nc physicalMeasurement region char region (region) time short time (time) time_bounds short regional_bt_anomaly_mt float NOAA Climate Data Record of regional monthly anomaly for mid-tropospheric microwave brightness temperature (brightness_temperature_anomaly) regional_bt_anomaly_mt_trends float Trends of NOAA Climate Data Record of regional monthly anomaly for mid-tropospheric microwave brightness temperature (brightness_temperature_anomaly_trends) uah_mlt_tmt_v06r00_monamg_s19781201_eYYYYMMDD_cYYYYMMDD.nc physicalMeasurement lon float longitude (longitude) lat float latitude (latitude) lon_bounds float lat_bounds float time short time (time) time_bounds short bt_anomaly_mt float NOAA Climate Data Record of monthly anomaly for mid-tropospheric microwave brightness temperature (brightness_temperature_anomaly) uah_mlt_ttp_v06r00_monacg_s19810101_e20101231_cYYYYMMDD.nc physicalMeasurement lon float longitude (longitude) lat float latitude (latitude) lon_bounds float lat_bounds float time short time (time) time_bounds short ac_tp float NOAA Climate Data Record of mean annual cycle of microwave brightness temperature in the tropopause (brightness_temperature) uah_mlt_ttp_v06r00_monreg_s19781201_eYYYYMMDD_cYYYYMMDD.nc physicalMeasurement region char region (region) time short time (time) time_bounds short regional_bt_anomaly_tp float NOAA Climate Data Record of regional monthly anomaly for tropopause microwave brightness temperature (brightness_temperature_anomaly) regional_bt_anomaly_tp_trends float Trends of NOAA Climate Data Record of regional monthly anomaly for tropopause microwave brightness temperature (brightness_temperature_anomaly_trends) uah_mlt_ttp_v06r00_monamg_s19781201_eYYYYMMDD_cYYYYMMDD.nc physicalMeasurement lon float longitude (longitude) lat float latitude (latitude) lon_bounds float lat_bounds float time short time (time) time_bounds short bt_anomaly_tp float NOAA Climate Data Record of monthly anomaly for tropopause microwave brightness temperature (brightness_temperature_anomaly) NOAA National Centers for Environmental Information ncei.info@noaa.gov https://www.ncei.noaa.gov/contact NCEI Contact Information Information for contacts at NCEI. information distributor 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. NetCDF 3 https://doi.org/10.7289/V5MC8X31 HTTPS Landing Page NCEI Dataset Landing Page Landing page for the dataset. information https://www.ncei.noaa.gov/products/climate-data-records/mean-layer-temperature-uah HTTPS Information NOAA CDR page Access to the published CDR product, documentation and source code. information https://www.ncei.noaa.gov/data/mean-layer-temperature-uah/access/ HTTPS Web Browser NCEI Direct Download Direct download links for dataset files. download https://registry.opendata.aws/noaa-cdr-fundamental/ HTTPS Information Registry of Open Data on AWS Information on AWS data access. information Region: us-east-1 https://noaa-cdr-mean-layer-temp-uah-pds.s3.amazonaws.com/index.html HTTPS Download AWS S3 Explorer (Region: us-east-1) Browse view to explore the S3 bucket. download Region: us-east https://microsoft.github.io/AIforEarthDataSets/data/noaa-cdr.html HTTPS Information Azure Landing Page (Region: us-east) Information on Microsoft Azure data access. information https://www.ncei.noaa.gov/thredds/catalog/satellite/cdr-uah-mean-layer-temperature.html HTTPS THREDDS THREDDS THREDDS Data Server (TDS) for the dataset. download dataset This dataset was produced by the Earth System Science Center, University of Alabama in Huntsville, and is archived at the NOAA National Centers for Environmental Information (NCEI). For a description of the processing steps, see the Algorithm Theoretical Basis Document and Data Flow Diagram for this dataset. Earth System Science Center, University of Alabama in Huntsville processor CDR Version 6 Source Code for Mean Layer Temperature - UAH 2017 publication DOC/NOAA/NESDIS/NCEI > National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce publisher https://www.ncei.noaa.gov/pub/data/sds/cdr/CDRs/Mean_Layer_Temperatures_UAH/SourceCode_01B-10.tar.gz HTTPS Web Browser CDR Source Code This source code is for reference only. The source code is provided to maintain transparency of the algorithm and processes used in creating the Climate Data Record (CDR). The source code is not intended to be portable to any computer system(s) beyond that of the original CDR producer's environment. download CDR Data Flow Diagram for Mean Layer Temperature - UAH 2017 publication DOC/NOAA/NESDIS/NCEI > National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce publisher https://www.ncei.noaa.gov/pub/data/sds/cdr/CDRs/Mean_Layer_Temperatures_UAH/DataFlowDiagram_01B-10.pdf HTTPS Web Browser CDR Data Flow Diagram Data processing flowchart for the CDR product. information Climate Algorithm Theoretical Basis Document (C-ATBD) for Mean Layer Temperature - UAH 2017 publication DOC/NOAA/NESDIS/NCEI > National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce publisher https://www.ncei.noaa.gov/pub/data/sds/cdr/CDRs/Mean_Layer_Temperatures_UAH/AlgorithmDescription_01B-10.pdf HTTPS Web Browser CDR Algorithm Description Algorithm Theoretical Basis Document for the CDR product. information Microwave Sounding Unit (MSU) Radiances from TIROS-N, NOAA-6, NOAA-7, NOAA-8, NOAA -9, NOAA -10, NOAA -11, NOAA -12, NOAA-14. Advanced Microwave Sounding Unit (AMSU) Radiances from NOAA-15, NOAA-18, NOAA-19, AQUA. 1 -180 180 -90 90 1978-12-01 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 series Data Stewardship Data Stewardship Maturity Assessment MM-Stew The Data Stewardship Maturity Matrix (DSMM) is a unified framework that defines criteria for each of nine components based on measurable practices, which can be used to apply a progressive, 6-level rating to an individual dataset, representing stewardship maturity stages rated as Not Assessed or Not Available (Level 0), adHoc (Level 1), minimum (Level 2), intermediate (Level 3), advanced (Level 4), and optimal (Level 5). Data Stewardship Maturity Assessment was evaluated by the metadata content editor for the NOAA OneStop project using the Scientific Data Stewardship Maturity Assessment Model Template v4.0. The Scientific Data Stewardship Maturity Assessment Model Template 2015-06-23 publication NCDC-CICS-SMM_0001_Rev.1 v4.0 06/23/2015 doi:10.10.6084/m9.figshare.1211954 Peng, Ge CICS-NC/NCEI author https://doi.org/10.6084/m9.figshare.1211954 HTTPS Web Browser The Scientific Data Stewardship Maturity Assessment Model Template Landing page for quality evaluation procedure. information documentDigital 2017-07-06T00:00:00 advanced minimal advanced advanced advanced intermediate intermediate intermediate advanced AMSU_MLT_UAH_CDR_V6 2017-07-06 publication v01r00 DOC/NOAA/NESDIS/NCEI > National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce publisher Data Stewardship Maturity Assessment was evaluated by the metadata content editor for the NOAA OneStop project using the Scientific Data Stewardship Maturity Assessment Model Template v4.0. asNeeded Bulk metadata change applied on 2023-07-06. See version control repository history for metadata change details. MSU > Microwave Sounding Unit AMSU > Advanced Microwave Sounding Unit TIROS-N > Television Infrared Observation Satellite-N NOAA-6 > National Oceanic & Atmospheric Administration - 6 NOAA-7 > National Oceanic & Atmospheric Administration - 7 NOAA-8 > National Oceanic & Atmospheric Administration - 8 NOAA-9 > National Oceanic & Atmospheric Administration - 9 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-15 > National Oceanic & Atmospheric Administration - 15 NOAA-18 > National Oceanic & Atmospheric Administration - 18 NOAA-19 > National Oceanic & Atmospheric Administration - 19 AQUA > Earth Observing System, AQUA