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NOAA Climate Data Record (CDR) of AVHRR Daily and Monthly Aerosol Optical Thickness over Global Oceans, Version 1.0 (Version Superseded)


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            title:  NOAA Climate Data Record (CDR) of AVHRR Daily and Monthly Aerosol Optical Thickness over Global Oceans, Version 1.0 (Version Superseded)
            alternateTitle:  AVHRR Aerosol Optical Thickness
            alternateTitle:  AVHRR AOT
            date:  (CI_Date)
                date:  2011-07-08
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        abstract:  *Note: This dataset version has been superseded by a newer version. It is highly recommended that users access the current version. Users should only use this version for special cases, such as reproducing studies that used this version.* This NOAA Climate Data Record (CDR) of aerosol optical thickness (AOT) at 0.63 micron is retrieved from operational AVHRR orbital pixel level observations in the Level-1B Global Area Coverage (GAC) dataset. The retrieval is performed for selected spatial (8-km) and temporal (1 time per day) resolution in cloud free condition during daytime over global oceans. The final product is mapped into 0.5 by 0.5 degree equal area grid (total 165018 grids over the globe). Due to the relatively large uncertainties associated with surface reflectance over water glint area and land surface as well as limited AVHRR retrieval channels, the current algorithm only performs retrieval over non-glint water surface (specifically at the anti-solar side of the orbit and viewing angle is larger than 40 degree away from the specular ray). The retrieval products include a daily and monthly mean product and cover the period from 1981 to 2009. Daily and monthly mean data files are grouped by ascending and descending node by satellite.
        purpose:  To develop and implement a robust, sustainable, and scientifically defensible approach to producing and preserving an aerosol optical thickness climate record from satellite data.
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            otherConstraints:  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.
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            otherConstraints:  Cite as: Zhao, T. X.-P., I. Laszlo, W. Guo, A. Heidinger, C. Cao, A. Jelenak, D. Tarpley, J. Sullivan, and NOAA CDR Program (2011): NOAA Climate Data Record (CDR) of AVHRR Daily and Monthly Aerosol Optical Thickness over Global Oceans, Version 1.0. [indicate subset used]. NOAA National Centers for Environmental Information. doi:TBD [access date].
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                    name:  Contact NCEI
                    description:  Contact NCEI for more information and to request access to the archived data. Requests are subject to NCEI order fulfillment constraints.
                    function:  (CI_OnLineFunctionCode) offline
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    dataQualityInfo:  (DQ_DataQuality)
        scope:  (DQ_Scope)
            level:  (MD_ScopeCode) dataset
        lineage: (missing)  (LI_Lineage)
            statement:  Version 1 has been superseded by a newer version. Please see Version 2 of this dataset for more information.
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    dataQualityInfo:  (DQ_DataQuality)
        scope:  (DQ_Scope)
            level:  (MD_ScopeCode) repository
            levelDescription:  (MD_ScopeDescription)
                other:  NOAA National Centers for Environmental Information
        lineage:  (LI_Lineage)
            processStep:  (LE_ProcessStep)
                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) notPlanned
        maintenanceNote:  Bulk metadata change applied on 2023-06-23. See version control repository history for metadata change details.
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    acquisitionInformation:  (MI_AcquisitionInformation)
        instrument:  (MI_Instrument)
            identifier:  (MD_Identifier)
                code:  > AVHRR-2 > Advanced Very High Resolution Radiometer-2
            type: (missing)
        instrument:  (MI_Instrument)
            identifier:  (MD_Identifier)
                code:  > AVHRR-2 > Advanced Very High Resolution Radiometer-2
            type: (missing)
        instrument:  (MI_Instrument)
            identifier:  (MD_Identifier)
                code:  > AVHRR-2 > Advanced Very High Resolution Radiometer-2
            type: (missing)
        instrument:  (MI_Instrument)
            identifier:  (MD_Identifier)
                code:  > AVHRR-2 > Advanced Very High Resolution Radiometer-2
            type: (missing)
        instrument:  (MI_Instrument)
            identifier:  (MD_Identifier)
                code:  > AVHRR-2 > Advanced Very High Resolution Radiometer-2
            type: (missing)
        instrument:  (MI_Instrument)
            identifier:  (MD_Identifier)
                code:  > AVHRR-2 > Advanced Very High Resolution Radiometer-2
            type: (missing)
        instrument:  (MI_Instrument)
            identifier:  (MD_Identifier)
                code:  > AVHRR-3 > Advanced Very High Resolution Radiometer-3
            type: (missing)
        instrument:  (MI_Instrument)
            identifier:  (MD_Identifier)
                code:  > AVHRR-3 > Advanced Very High Resolution Radiometer-3
            type: (missing)
        instrument:  (MI_Instrument)
            identifier:  (MD_Identifier)
                code:  > AVHRR-3 > Advanced Very High Resolution Radiometer-3
            type: (missing)
        instrument:  (MI_Instrument)
            identifier:  (MD_Identifier)
                code:  > AVHRR-3 > Advanced Very High Resolution Radiometer-3
            type: (missing)
        platform:  (MI_Platform)
            identifier:  (MD_Identifier)
                code:  NOAA-7 > National Oceanic & Atmospheric Administration-7
            description: (missing)
            instrument: (missing)
        platform:  (MI_Platform)
            identifier:  (MD_Identifier)
                code:  NOAA-9 > National Oceanic & Atmospheric Administration-9
            description: (missing)
            instrument: (missing)
        platform:  (MI_Platform)
            identifier:  (MD_Identifier)
                code:  NOAA-10 > National Oceanic &Atmospheric Administration-10
            description: (missing)
            instrument: (missing)
        platform:  (MI_Platform)
            identifier:  (MD_Identifier)
                code:  NOAA-11 > National Oceanic & Atmospheric Administration-11
            description: (missing)
            instrument: (missing)
        platform:  (MI_Platform)
            identifier:  (MD_Identifier)
                code:  NOAA-12 > National Oceanic &Atmospheric Administration-12
            description: (missing)
            instrument: (missing)
        platform:  (MI_Platform)
            identifier:  (MD_Identifier)
                code:  NOAA-14 > National Oceanic & Atmospheric Administration-14
            description: (missing)
            instrument: (missing)
        platform:  (MI_Platform)
            identifier:  (MD_Identifier)
                code:  NOAA-15 > National Oceanic & Atmospheric Administration-15
            description: (missing)
            instrument: (missing)
        platform:  (MI_Platform)
            identifier:  (MD_Identifier)
                code:  NOAA-16 > National Oceanic & Atmospheric Administration-16
            description: (missing)
            instrument: (missing)
        platform:  (MI_Platform)
            identifier:  (MD_Identifier)
                code:  NOAA-18 > National Oceanic & Atmospheric Administration-18
            description: (missing)
            instrument: (missing)
        platform:  (MI_Platform)
            identifier:  (MD_Identifier)
                code:  MetOp-A > Meteorological Operational Satellite - A
            description: (missing)
            instrument: (missing)