gov.noaa.ncdc:C00860 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 2026-01-30T21:56:05 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 Visible and Near Infrared Reflectance from AVHRR, Version 1.0 AVHRR Radiances - NASA 2015-08-01 publication Version 1.0 doi:10.7289/V5NK3C0J NCEI DSI 2005_01 gov.noaa.ncdc:C00860 NOAA National Centers for Environmental Information publisher DOC/NOAA/NESDIS/NCDC > National Climatic Data Center, NESDIS, NOAA, U.S. Department of Commerce User Engagement and Services Branch 1-828-271-4800 1-828-271-4876 151 Patton Avenue Veach-Baley Federal Building, Room 468 Asheville NC 28801-5001 USA ncei.orders@noaa.gov https://www.ncdc.noaa.gov HTTPS Web Browser NOAA National Centers for Environmental Information (NCEI) NCEI home page with information, data access, and customer support contacts. information 8:00 - 6:00 Eastern publisher Doelling, David Science Directorate, NASA Langley Research Center Research Scientist 757-864-2155 david.r.doelling@nasa.gov principalInvestigator Doelling, David Science Directorate, NASA Langley Research Center Research Scientist 757-864-2155 david.r.doelling@nasa.gov author Minnis, Patrick Science Directorate, NASA Langley Research Center Senior Scientist p.minnis@nasa.gov principalInvestigator Minnis, Patrick Science Directorate, NASA Langley Research Center Senior Scientist p.minnis@nasa.gov author NOAA CDR Program +1 828-271-4800 cdr-ipt-cloud_bundle@noaa.gov collaborator NOAA CDR Program +1 828-271-4800 cdr-ipt-cloud_bundle@noaa.gov author imageDigital The AVHRR visible gains and offsets convert GAC pixel level counts to radiances and are provided for each visible band encompassing TIROS-N, NOAA-6 through NOAA-19 and Metop-A and B satellites. The resulting radiances are referenced to the Aqua-MODIS band 1 and 2 absolute calibration. Instructions are also given to convert AVHRR-3 (NOAA-15 to Metop-B) GAC high and low gain counts to the proper radiance. The gains vary temporally and are given as a function of day since launch, where the launch date is provided. The satellite and band specific solar constants are also provided to convert radiances into reflectances based on the solar incoming irradiance used by the MODIS Science Team. The resulting radiance uncertainty is given in %. The calibration coefficients are only valid for the start and end dates listed for each satellite. Three data variables are derived from 4 km AVHRR Global Area Coverage data: Calibrated 0.63 micron channel reflectance (unitless), Calibrated 0.86 micron reflectance (unitless), Calibrated 1.61 micron reflectance (unitless) The visible calibration coefficients are designed for cloud, land use, and radiation imager retrieval algorithms to provide consistent 35+year climate quality retrievals over time and across satellite platforms. The satellite-based visible calibration uncertainties are provided as a quality indicator of the calibration coefficients. The calibration coefficients are referenced to the Aqua-MODIS band 1 and 2 absolute calibration. The visible calibration coefficients were derived over deep convective clouds, Sahara and Arabian Desert sites, as well as the Dome-C and Greenland pseudo invariant targets to compensate for individual site stability fluctuations over satellite lifetimes. NOAA National Centers for Environmental Information Customer Engagement Branch 1-828-271-4800 1-828-271-4876 151 Patton Avenue Veach-Baley Federal Building, Room 468 Asheville NC 28801-5001 USA ncei.orders@noaa.gov https://www.ncei.noaa.gov HTTPS Web Browser NOAA National Centers for Environmental Information (NCEI) NCEI home page with information, data access and contact information. information 8:00 - 6:00 Eastern pointOfContact National Centers for Environmental Information NOAA Climate Data Record Program Office +1 828-271-4800 cdr-ipt-cloud_bundle@noaa.gov pointOfContact monthly https://www.ncei.noaa.gov/pub/data/metadata/images/C00860.PNG Sample image from dataset PNG Earth Science > Atmosphere > Atmospheric Radiation > Reflectance Earth Science > Atmosphere > Atmospheric Radiation > Shortwave Radiation Earth Science > Atmosphere > Atmospheric Radiation > Solar Radiation Earth Science > Atmosphere > Clouds > Cloud Radiative Transfer Earth Science > Atmosphere > Clouds > Cloud Properties Earth Science > Land Surface > Surface Radiative Properties > Albedo Earth Science > Land Surface > Surface Radiative Properties > Reflectance 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 Atmospheric - Composition - Earth Radiation Budget Atmospheric - Composition - Surface Radiation Budget theme Global Climate Observing System (GCOS) Essential Climate Variables (ECVs) 2017 publication Release 2017 World Meteorological Organization, United Nations https://public.wmo.int/en/programmes/global-climate-observing-system/essential-climate-variables HTTP Information GCOS Essential Climate Variables Overview of the GCOS Essential Climate Variables. information custodian NOAA Climate Data Record (CDR) Program 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 Satellite product 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 > Boundary Layer Vertical Location > Stratosphere 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 AVHRR > Advanced Very High Resolution Radiometer AVHRR-2 > Advanced Very High Resolution Radiometer-2 AVHRR-3 > Advanced Very High Resolution Radiometer-3 GOES I-M IMAGER 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 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-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 METOP-A > Meteorological Operational Satellite - A METOP-B > Meteorological Operational Satellite - B GOES-1 > Geostationary Operational Environmental Satellite 1 GOES-2 > Geostationary Operational Environmental Satellite 2 GOES-3 > Geostationary Operational Environmental Satellite 3 GOES-4 > Geostationary Operational Environmental Satellite 4 GOES-5 > Geostationary Operational Environmental Satellite 5 GOES-6 > Geostationary Operational Environmental Satellite 6 GOES-7 > Geostationary Operational Environmental Satellite 7 GOES-8 > Geostationary Operational Environmental Satellite 8 GOES-9 > Geostationary Operational Environmental Satellite 9 GOES-10 > Geostationary Operational Environmental Satellite 10 GOES-11 > Geostationary Operational Environmental Satellite 11 GOES-12 > Geostationary Operational Environmental Satellite 12 GOES-13 > Geostationary Operational Environmental Satellite 13 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 1 km - < 10 km or approximately .01 degree - < .09 degree dataResolution Global Change Master Directory (GCMD) Horizontal Data Resolution 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 Hourly - < Daily dataResolution Global Change Master Directory (GCMD) Temporal Data Resolution 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 > 1 km dataResolution Global Change Master Directory (GCMD) Vertical Data Resolution 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/NCDC > National Climatic Data Center, NESDIS, NOAA, U.S. Department of Commerce DOC/NOAA/NESDIS/NCEI > National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce Science Directorate, Langley Research Center, NASA 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 the use limitations for this dataset. Individual satellite AVHRR visible calibration uncertainty will increase over time as the NOAA satellite orbit degrades to either sunset or sunrise. The shorter the spacecraft temporal record the more uncertain the calibration. The space count was not explicitly derived for each satellite and dark calibrated radiances may not be accurate for certain applications, for example over clear-sky ocean and near terminator conditions. Older AVHRR satellite spectral response functions are not as well known and may introduce uncertainties, which cannot be estimated. The calibration coefficients address only the long term optical degradation and does not address detector to detector striping, orbital dependent variation, scan angle dependencies, or instrument noise. otherRestrictions Cite as: Doelling, David; Minnis, Patrick; and the NOAA CDR Program (2015): NOAA Climate Data Record (CDR) of Visible and Near Infrared Reflectance from GOES and AVHRR, Version 1.0. [indicate subset used]. NOAA National Centers for Environmental Information. doi:10.789/V5NK3C0J [access date]. 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. NOAA Climate Data Record (CDR) of Clear-Sky Radiation Properties, Version 1.0 2015-03-01 publication 1.0 DOC/NOAA/NESDIS/NCDC > National Climatic Data Center, NESDIS, NOAA, U.S. Department of Commerce publisher https://doi.org/10.7289/V5HT2M8T HTTPS Landing Page NCEI Landing Page for AVHRR Cloud Properties - NASA Related dataset landing page with general information and access links for that dataset. information largerWorkCitation collection 4000 eng; USA climatologyMeteorologyAtmosphere 1 -180.0 180.0 -90.0 90.0 ground condition 1978-11-05 2015-12-31 2 NSS.GHRR.[SatID].D[Date].S[StartTime].E[EndTime]_NASA_LaRC_cloud_properties.nc physicalMeasurement latitude float latitude (latitude) longitude float longitude (longitude) year_and_dayofyear int Scan Line Year and Day of Year in YYYYDDD Format time int Scan Line Time (time) reflectance_063micron int NOAA Climate Data Record of AVHRR 0.63 Micron Channel Reflectance (toa_bidirectional_reflectance) reflectance_086micron int NOAA Climate Data Record of AVHRR 0.86 Micron Channel Reflectance (toa_bidirectional_reflectance) reflectance_161micron int NOAA Climate Data Record of AVHRR 1.61 Micron Channel Reflectance (toa_bidirectional_reflectance) brightness_temperature_375micron short AVHRR 3.75 Micron Channel Brightness Temperature (brightness_temperature) brightness_temperature_108micron short AVHRR 10.8 Micron Channel Brightness Temperature (brightness_temperature) brightness_temperature_120micron short AVHRR 12.0 Micron Channel Brightness Temperature (brightness_temperature) cloud_mask byte NOAA Climate Data Record of Cloudy and Clear Sky Pixel Detection (cloud_binary_mask) cloud_phase byte NOAA Climate Data Record of Cloud Top Thermodynamic Phase (thermodynamic_phase_of_cloud_water_particles_at_cloud_top) optical_depth short NOAA Climate Data Record of Cloud Optical Depth (atmosphere_optical_thickness_due_to_cloud) effective_radius short NOAA Climate Data Record of Particle Effective Radius (effective_radius_of_cloud_liquid_water_particle_at_liquid_water_cloud_top) cloud_top_pressure short Cloud Top Pressure (air_pressure_at_cloud_top) cloud_effective_pressure short NOAA Climate Data Record of Air Pressure At Effective Cloud Top (air_pressure_at_effective_cloud_top_defined_by_infrared_radiation) cloud_base_pressure short Cloud Base Pressure (air_pressure_at_cloud_base) cloud_top_height short Cloud Top Height (cloud_top_altitude) cloud_effective_height short NOAA Climate Data Record of Height At Effective Cloud Top (height_at_effective_cloud_top_defined_by_infrared_radiation) cloud_base_height short Cloud Base Height (cloud_base_altitude) cloud_top_temperature short Cloud Top Temperature (air_temperature_at_cloud_top) cloud_effective_temperature short NOAA Climate Data Record of Air Temperature At Effective Cloud Top (air_temperature_at_effective_cloud_top_defined_by_infrared_radiation) overshooting_mask byte Overshooting Convective Cloud Top Detection Mask pixel_skin_temperature short Clear Sky Surface Skin Temperature (surface_temperature) shortwave_broadband_albedo short Top of Atmosphere Shortwave Broadband Albedo (toa_outgoing_shortwave_flux) longwave_broadband_flux short Top of Atmosphere Longwave Broadband Flux (toa_outgoing_longwave_flux) relative_azimuth short Relative Azimuth Angle (relative_sensor_azimuth_angle) viewing_zenith short Viewing Zenith Angle (zenith_angle) solar_zenith short Solar Zenith Angle (solar_zenith_angle) snowice_flag byte Snow and Ice Cover Analysis or Detection from MERRA and AVHRR pixel_skin_temperature_quality_flag byte Quality Flag for Pixel Level Skin Temperature Retrieval clear_sky_category byte Clear Sky Pixel Classification cloud_category byte Cloudy Pixel Classification 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 4 The NetCDF data files comply with the Climate and Forecast (CF) Metadata Conventions and the NetCDF Attribute Convention for Dataset Discovery (ACDD). netCDF 4 The NetCDF data files comply with the Climate and Forecast (CF) Metadata Conventions and the NetCDF Attribute Convention for Dataset Discovery (ACDD). https://doi.org/10.7289/V5NK3C0J HTTPS Landing Page NCEI Dataset Landing Page Landing page for the dataset. information https://www.ncdc.noaa.gov/has/HAS.FileAppRouter?datasetname=200501&subqueryby=STATION&applname=&outdest=FILE HTTPS Data Search Application NCEI Archive Information Request System (AIRS) Search the data archive and submit an order for the dataset via the interface. order https://www.ncei.noaa.gov/products/climate-data-records/avhrr-radiances-nasa HTTPS Landing Page AVHRR Radiances - NASA Access to the published CDR, source code, and documentation. information dataset The data were produced by the NASA Langley Research Center, and are archived at the NOAA National Centers for Environmental Information (NCEI). Data are converted from GAC pixel counts to radiances; for calibration, these radiances are referenced to the Aqua-MODIS band 1 and 2 absolute calibration before being converted to reflectances based on the solar incoming irradiance used by the MODIS Science Team. For more information, please review the documentation. In 2017, the dataset title was changed to remove reference to GOES. This was done to prevent confusion as GOES data is not used in the dataset--the actual TCDR files where the calibration coefficients were applied only contain the AVHRR data. The publically available calibration coefficient files for the dataset do include the GOES solar calibration coefficients. For a description of the processing steps, see the Algorithm Theoretical Basis Document and Data Flow Diagram for this dataset. NASA Langley Research Center processor Source Code Package for AVHRR Radiances - NASA 2015-08-01 publication National Centers for Environmental Information publisher https://www.ncei.noaa.gov/pub/data/sds/cdr/CDRs/AVHRR_Radiances_NASA/SourceCode_01B-30a.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 Calibration Coefficients for AVHRR Radiances - NASA 2015-08-01 publication National Centers for Environmental Information publisher https://www.ncei.noaa.gov/pub/data/sds/cdr/CDRs/AVHRR_Radiances_NASA/Calibration_coefficients_01B-30a.tar.gz HTTPS Web Browser Calibration Coefficients This code is for reference only. The code is provided to maintain transparency of the algorithm and processes used in creating the Climate Data Record (CDR). The code is not intended to be portable to any computer system(s) beyond that of the original CDR producer's environment. download NASA LaRC AVHRR & GOES Shortwave Channel Calibration FCDR Top Level Flowchart 2016-09-09 publication Rev 1 CDRP-DIA-0825 National Centers for Environmental Information publisher https://www.ncei.noaa.gov/pub/data/sds/cdr/CDRs/AVHRR_Radiances_NASA/DataFlowDiagram_01B-30a.pdf HTTPS Web Browser CDR Data Flow Diagram Flowcharts for the CDR product. information Climate Algorithm Theoretical Basis Document for AVHRR Radiances - NASA 2016-07-10 publication CDRP-ATBD-0823 National Centers for Environmental Information publisher https://www.ncei.noaa.gov/pub/data/sds/cdr/CDRs/AVHRR_Radiances_NASA/AlgorithmDescription_01B-30a.pdf HTTPS Web Browser Climate Algorithm Theoretical Basis Document ATBD for the CDR product. information AVHRR GAC Data are the primary input into this dataset Advanced Very High Resolution Radiometer (AVHRR) Global Access Coverage (GAC) data DOC/NOAA/CLASS > Comprehensive Large Array-data Stewardship System, NOAA, U.S. Department of Commerce distributor https://www.class.noaa.gov/saa/products/search?datatype_family=AVHRR Web Browser AVHRR GAC data access point For more information about the NOAA AVHRR GAC dataset, please refer to the link. information 1 -180 180 -90 90 1978-01-01 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 asNeeded Bulk metadata change applied on 2023-06-23. See version control repository history for metadata change details.