NOAA Climate Data Record (CDR) of GPS RO-Calibrated AMSU Channel 7 (Temperatures of Troposphere / Stratosphere, TTS), Version 1.0 (Version Superseded)


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            title:  NOAA Climate Data Record (CDR) of GPS RO-Calibrated AMSU Channel 7 (Temperatures of Troposphere / Stratosphere, TTS), Version 1.0 (Version Superseded)
            alternateTitle:  Mean Layer Temperature - UCAR (Upper Trop & Lower Strat)
            date:  (CI_Date)
                date:  2013-11-07
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                date:  2013-09-20
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                code:  NCEI DSI 3659_01
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                organisationName:  UCAR/COSMIC/CDAAC > COSMIC Data Analysis and Archive Center, Constellation Observing System for Meteorology, Ionosphere and Climate, University Corporation for Atmospheric Research
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                organisationName:  DOC/NOAA/NESDIS/NCDC > National Climatic Data Center, NESDIS, NOAA, U.S. Department of Commerce
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                individualName:  Ho, S.-P.
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                individualName:  Ho, S.-P.
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                individualName:  Goldberg, M.
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                individualName:  Goldberg, M.
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                individualName:  Kuo, Y.-H.
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                individualName:  Kuo, Y.-H.
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                individualName:  Zou, C.-Z
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                individualName:  Zou, C.-Z
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                individualName:  Schreiner, W.
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                        name:  Mean Layer Temperature - UCAR (Upper Trop/Lower Strat) Version 2 Landing Page
                        description:  **Current Version** For access and information about the current dataset version, please follow the link.
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        abstract:  The Climate Data Records (CDR) for Channel 7 contains Radio Occulation (RO) calibrated brightness temperatures from AMSU-A channel 7 measurements at 54.9 GHz from 2001 through present on a 2.5 degree grid. Data are partitioned into yearly files with monthly variables, where each file contains RO-calibrated channel 7 brightness temperatures from AMSU-A measurements from NOAA-15, 16, 17, 18, 19, NASA AQUA and Metop-A. The dataset uses version 2010.2640 of the RO mission data from the UCAR COSMIC Data Analysis and Archival Center (CDAAC), the NOAA archive of the Level 1b AMSU dataset, and the NASA DAAC archive of the Aqua Level 1B dataset. The RO satellites measure the bending angle of GPS signals as they pass through the atmosphere. Temperature profiles are derived from these GPS bending angles from the COSMIC and CHAMP data from 2001 through present. Calibration coefficients are calculated from coincident measurements of AMSU channel 7 brightness temperatures and corresponding values derived from an AMSU forward model applied to temperature profile measurements from RO identified radiosondes. The monthly calibration coefficients are applied to adjust the AMSU Temperature Troposphere Stratosphere (TTS) measurements for each polar orbiter to the temperature profiles from the RO identified Radiosonde Observations (RAOBs). The calibrated AMSU measurements are then combined into gridded monthly values. From these the climatology is calculated using 12 years of data. Anomaly values are then obtained by subtracting this climatology from the monthly values.
        purpose:  This dataset provides advanced scientific researchers a high quality Climate Data Record (CDR) of Upper Troposphere / Stratosphere Temperatures. The objective of this study is to use highly stable GPS RO data to identify high quality radiosonde data and sue the radiosonde data to calibrate AMSU-A channel 7 brightness temperatures and to further use the calibrated AMSU brightness temperatures to construct a consistent climate data record. This dataset would help for climate temperature trend studies, climate model validation, and for decision makers to establish climate policies.
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            keyword:  UCAR/COSMIC/CDAAC > COSMIC Data Analysis and Archive Center, Constellation Observing System for Meteorology, Ionosphere and Climate, University Corporation for Atmospheric Research
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        resourceConstraints:  (MD_Constraints)
            useLimitation:  For a complete description of use limitations for this CDR, see the Algorithm Theoretical Basis Document.
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            otherConstraints:  Use Constraints: NCEI cannot assume liability for any damages caused by any errors or omissions in the data, nor as a result of the failure of the data to function on a particular system. NCEI makes no warranty, expressed or implied, nor does the fact of distribution constitute such a warranty. 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.
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            otherConstraints:  Cite as: Ho, S.-P., M. Goldberg, Y.-H. Kuo, C.-Z Zou, W. Schreiner, and the NOAA CDR Program (2013): NOAA Climate Data Record (CDR) of GPS RO-Calibrated AMSU Channel 7 (Temperatures of Troposphere / Stratosphere, TTS), Version 1.0 [Indicate subset used]. NOAA National Centers for Environmental Information. [access date].
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            otherConstraints:  Publications using this dataset should also reference the following journal article: Ho, S.-P., M. Goldberg, Y.-H. Kuo, C.-Z Zou, W. Schreiner, Calibration of Temperature in the Lower Stratosphere from Microwave Measurements using COSMIC Radio Occultation Data: Preliminary Results, Terr. Atmos. Oceanic Sci., Vol. 20, doi: 10.3319/TAO.2007.12.06.01(F3C), 2009.
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                title:  NOAA Climate Data Record for Mean Layer Temperature (Upper Troposphere & Lower Stratosphere) from UCAR, Version 2
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                            linkage: https://doi.org/10.7289/V5XP72XZ
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                            name:  Mean Layer Temperature - UCAR (Upper Trop & Lower Strat) Version 2.0 Landing Page
                            description:  **Current Version** For access and information about the current dataset version, please follow the link.
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                title:  Calibration of Temperature in the Lower Stratosphere from Microwave Measurements Using COSMIC Radio Occultation Data: Preliminary Results
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                            linkage: http://nldr.library.ucar.edu/repository/assets/osgc/OSGC-000-000-003-203.pdf
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                            name:  Calibration of Temperature in the Lower Stratosphere from Microwave Measurements Using COSMIC Radio Occultation Data: Preliminary Results
                            description:  Please view the journal article associated with the dataset.
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        language:  eng; USA
        topicCategory:  (MD_TopicCategoryCode) climatologyMeteorologyAtmosphere
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                    description:  ground condition
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            units:  http://example.org/someUnitsDictionary.xml#K
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            descriptor:  NOAA Climate Data Record of AMSU Channel 7 Brightness Temperature Anomaly (brightness_temperature_anomaly)
            units:  http://example.org/someUnitsDictionary.xml#K
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            units:  http://example.org/someUnitsDictionary.xml#K
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    distributionInfo:  (MD_Distribution)
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                fees:  In most cases, electronic downloads of the data are free, however fees may apply for data certifications, copies of analog materials, and data distribution on physical media.
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                    name:  Mean Layer Temperature - UCAR (Upper Trop & Lower Strat) Version 1.0 (Version Superseded) Landing Page
                    description:  This dataset provides advanced scientific researchers a high quality Climate Data Record (CDR) of Upper Troposphere / Stratosphere Temperatures. The objective of this study is to use highly stable GPS RO data to identify high quality radiosonde data and sue the radiosonde data to calibrate AMSU-A channel 7 brightness temperatures and to further use the calibrated AMSU brightness temperatures to construct a consistent climate data record. This dataset would help for climate temperature trend studies, climate model validation, and for decision makers to establish climate policies.
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                        deliveryPoint:  151 Patton Avenue
                        deliveryPoint:  Veach-Baley Federal Building, Room 468
                        city:  Asheville
                        administrativeArea:  NC
                        postalCode:  28801-5001
                        country:  USA
                        electronicMailAddress:  ncei.orders@noaa.gov
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                        name:  NOAA National Centers for Environmental Information (NCEI)
                        description:  NCEI home page with information, data access and contact information.
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                    name:  NCEI Customer Service
                    description:  For access to this version of the dataset (superseded), please contact the Customer Engagement Branch.
                    function:  (CI_OnLineFunctionCode) search
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            statement:  For a complete description of the processing steps, see the Algorithm Theoretical Basis Document and Data Flow Diagram.
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                    softwareReference:  (CI_Citation)
                        title:  Source Code Package for AMSU Ch7, v1.0
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                            date:  2013-12-13
                            dateType:  (CI_DateTypeCode) publication
                        citedResponsibleParty:  (CI_ResponsibleParty)
                            organisationName:  NOAA Climate Data Record Program Office
                            role:  (CI_RoleCode) publisher
                    documentation:  (CI_Citation)
                        title:  Data Flow Diagram for AMSU Ch7, v1.0
                        date:  (CI_Date)
                            date:  2013-08-09
                            dateType:  (CI_DateTypeCode) publication
                        citedResponsibleParty:  (CI_ResponsibleParty)
                            organisationName:  NOAA Climate Data Record Program Office
                            role:  (CI_RoleCode) publisher
                    algorithm:  (LE_Algorithm)
                        citation:  (CI_Citation)
                            title:  Climate Algorithm Theoretical Basis Document (C-ATBD) for AMSU Ch7, v1.0
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                                date:  2013-07-26
                                dateType:  (CI_DateTypeCode) publication
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                                organisationName:  NOAA Climate Data Record Program Office
                                role:  (CI_RoleCode) publisher
                        description:  See Algorithm Citation
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                description:  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.
                dateTime:
                  DateTime:  2015-04-22T00:00:00
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    metadataMaintenance:  (MD_MaintenanceInformation)
        maintenanceAndUpdateFrequency:  (MD_MaintenanceFrequencyCode) asNeeded
        maintenanceNote:  Bulk metadata change applied on 2018-11-05. See version control repository history for metadata change details.