gov.noaa.ncdc:C01579 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 2025-12-15T17:57:01 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 AVHRR Polar Pathfinder (APP) Cryosphere, Version 2 AVHRR Polar Pathfinder 2019-05 publication Version 2.0 doi:10.25921/X2X1-JR34 NCEI DSI 3713_02 gov.noaa.ncdc:C01579 Access Identifier avhrr-polar-pathfinder DOC/NOAA/NESDIS/NCEI > National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce publisher Key, Jeffery DOC/NOAA/NESDIS/STAR > Center for Satellite Applications and Research, NESDIS, NOAA, U.S. Department of Commerce +1 608-263-2605 jeff.key@noaa.gov principalInvestigator Key, Jeffery DOC/NOAA/NESDIS/STAR > Center for Satellite Applications and Research, NESDIS, NOAA, U.S. Department of Commerce +1 608-263-2605 jeff.key@noaa.gov author Lui, Yinghui UWI-MAD/SSEC/CIMSS > Cooperative Institute for Meteorological Satellite Studies, Space Science and Engineering Center, University of Wisconsin, Madison Research Scientist +1 608-890-1893 yinghuil@ssec.wisc.edu collaborator Lui, Yinghui UWI-MAD/SSEC/CIMSS > Cooperative Institute for Meteorological Satellite Studies, Space Science and Engineering Center, University of Wisconsin, Madison Research Scientist +1 608-890-1893 yinghuil@ssec.wisc.edu author Wang, Xuanji UWI-MAD/SSEC/CIMSS > Cooperative Institute for Meteorological Satellite Studies, Space Science and Engineering Center, University of Wisconsin, Madison Research Scientist +1 608-261-1390 xuanji.wang@ssec.wisc.edu collaborator Wang, Xuanji UWI-MAD/SSEC/CIMSS > Cooperative Institute for Meteorological Satellite Studies, Space Science and Engineering Center, University of Wisconsin, Madison Research Scientist +1 608-261-1390 xuanji.wang@ssec.wisc.edu author NOAA CDR Program collaborator NOAA CDR Program author https://doi.org/10.25921/X2X1-JR34 HTTPS Description AVHRR Polar Pathfinder (APP) Cryosphere - NOAA Landing Page This dataset provides advanced scientific researchers a high quality Climate Data Record (CDR) intended for use in deriving higher-level geophysical parameters such as surface temperature and albedo, cloud properties, etc. information https://www.ncei.noaa.gov/products/climate-data-records/avhrr-polar-pathfinder Information Operational Climate Data Records in the NOAA CDR Program Access to the published CDR, source code, and documentation. information imageDigital This NOAA Climate Data Record (CDR) contains the AVHRR Polar Pathfinder (APP) product. APP is a fundamental CDR comprised of calibrated and navigated AVHRR channel data (reflectances and brightness temperatures), viewing and illumination geometry (sensor scan angle, solar zenith angle, and sun-sensor relative azimuth angle), Universal Coordinated Time (UTC) of the data acquisition, and a surface type mask. The data are twice daily composites of up to 23 orbits on a 5 km Equal-Area Scalable Earth (EASE)-Grid twice daily over both poles, the Arctic and Antarctic, from 1982 to the present. The daily APP composites are centered on local solar times of 14:00 (high sun, but could be nighttime for some polar areas in winter) and 04:00 for the Arctic or 02:00 for the Antarctic. The APP covers the north polar region (Arctic) from 48.4 degrees northward, and the south polar region (Antarctic) from -53.2 degrees southward. The update to version 2 of the APP FCDR was updated calibration coefficients for AVHRR GAC visible channels over the entire period. This dataset provides advanced scientific researchers a high quality Climate Data Record (CDR) intended for use in deriving higher-level geophysical parameters such as surface temperature and albedo, cloud properties, etc. NOAA Climate Data Record Program (CDRP) app_contacts@noaa.gov pointOfContact daily https://www.ncei.noaa.gov/pub/data/metadata/images/C00940_browseimage.jpg APP channel 1 reflectance JPEG Earth Science > Spectral/Engineering > Infrared Wavelengths > Brightness Temperature 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 Geographic Region > Arctic Continent > Antarctica 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 > Land Surface Vertical Location > Sea Surface 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 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 NOAA POES > NOAA Polar Orbiting Environmental Satellites 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 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 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 For a complete description of use limitations for this CDR, see the Algorithm Theoretical Basis Document. otherRestrictions Cite as: Key, Jeffrey; Liu, Yinghui; Wang, Xuanji; and NOAA CDR Program (2019):NOAA Climate Data Record (CDR) of AVHRR Polar Pathfinder (APP) Cryosphere, Version 2.0. NOAA National Centers for Environmental Information (NCEI). doi:10.25921/X2X1-JR34 [access date]. 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. AVHRR-based polar pathfinder products for modeling applications 1997 publication 25, 388-392 Annals of Glaciology publisher http://www.igsoc.org/annals/25/ Web Browser AVHRR-based polar pathfinder products for modeling applications Annals of Glaciology Volume 25 website information crossReference sciencePaper NOAA Climate Data Record (CDR) of AVHRR Polar Pathfinder Extended (APP-X) Climate Data Record (CDR) 2016-01 publication Version 2.0 doi:10.25921/AE96-0E57 DOC/NOAA/NESDIS/NCDC > National Climatic Data Center, NESDIS, NOAA, U.S. Department of Commerce publisher https://doi.org/10.25921/AE96-0E57 HTTPS Web Browser NOAA Climate Data Record (CDR) of AVHRR Polar Pathfinder Extended (APP-X) Climate Data Record (CDR) Landing page for related dataset, APP-X CDR information crossReference project Deriving an inter-sensor consistent calibration for the AVHRR solar reflectance data record 2010 publication 31 (24), 6493-6517 10.1080/01431161.2010.496472 International Journal of Remote Sensing publisher https://doi.org/10.1080/01431161.2010.496472 HTTPS Web Browser Deriving an inter-sensor consistent calibration for the AVHRR solar reflectance data record International Journal of Remote Sensing landing page for given paper. information crossReference sciencePaper Calibrations for AVHRR channels 1 and 2: review and path towards consensus 2010 publication 31, 6519-6540 10.1080/01431161.2010.496473 International Journal of Remote Sensing publisher https://doi.org/10.1080/01431161.2010.496473 HTTPS Web Browser Calibrations for AVHRR channels 1 and 2: review and path towards consensus International Journal of Remote Sensing landing page for given paper. information crossReference sciencePaper grid 5000 eng; USA climatologyMeteorologyAtmosphere 1 -180.0 180.0 -90.0 90.0 ground condition 1982-01-01 12 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 netCDF-4 https://doi.org/10.25921/X2X1-JR34 HTTPS Landing Page NCEI Dataset Landing Page Landing page for the dataset. information https://www.ncei.noaa.gov/data/avhrr-polar-pathfinder/access/ HTTPS Download CDR Direct Download Direct download of the CDR files. download https://www.ncei.noaa.gov/thredds/catalog/avhrr-polar-pathfinder-files/catalog.html HTTPS Download NCEI THREDDS Catalog Links to data set on THREDDS server for sub-setting and downloading data. 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-polar-pathfinder-fcdr-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/has/HAS.FileAppRouter?datasetname=371301&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. search dataset This Climate Data Record (CDR) were produced by NOAA Center for Satellite Applications and Research (STAR) and University of Wisconsin and are archived at the NOAA National Centers for Environmental Information (NCEI). For a complete description of the processing steps, see the Algorithm Theoretical Basis Document and Data Flow Diagram. processor Source Code Package for APP CDR 2015-10-26 publication Version 2.0 CDRP-DIA-0720 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/AVHRR_Polar_Pathfinder/SourceCode_01B-24a.tar.gz HTTPS Web Browser Source Code Package for APP CDR The Source Code Package for the APP CDR. 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. The source code is not intended to be portable to any computer system(s) beyond that of the original CDR producer's environment. download Data Flow Diagram for APP CDR 2023-08-23 publication Rev. 2 CDRP-DIA-0720 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/AVHRR_Polar_Pathfinder/DataFlowDiagram_01B-24a.pdf HTTPS Web Browser Data Flow Diagram for APP CDR The Data Flow Diagram for APP CDR shows an overview of the steps used to produce the dataset. information Climate Algorithm Theoretical Basis Document for APP CDR 2023-07-19 publication CDRP-ATBD-0572 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/AVHRR_Polar_Pathfinder/AlgorithmDescription_01B-24a.pdf HTTPS Web Browser Climate Algorithm Theoretical Basis Document ATBD for the CDR product. information Level 1b AVHRR Global Area Coverage from CLASS Level 1b AVHRR Global Area Coverage Comprehensive Large Array-data Stewardship System (CLASS) publisher https://www.class.noaa.gov/saa/products/search?datatype_family=AVHRR HTTPS Web Browser Level 1b AVHRR Global Area Coverage Landing page for dataset, where the DOI points to. information 1 -180 180 -90 90 1982 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 2023-07-06. See version control repository history for metadata change details.