NOAA Climate Data Record (CDR) of Reflectance from AVHRR Pathfinder Atmospheres - Extended (PATMOS-x), Version 5.2 (Version Superseded)
AVHRR Reflectance - PATMOS-x
AVHRR cloud optical depth at the nominal wavelength of 0.65 microns determined from the DCOMP algorithm.
*Note: This dataset version has been superseded by a newer version.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.* The Pathfinder Atmospheres - Extended (PATMOS-x) Reflectance data contain derived atmospheric variables from the Advanced Very High Resolution Radiometer (AVHRR) Global Area Coverage (GAC) data observed from three decades of the NOAA Polar-orbiting Operational Environmental Satellite (POES) series. PATMOS-x data consists of twice daily fields from AVHRR/1, AVHRR/2 and AVHRR/3 GAC data from 1978 to 2009. The radiometric products are on a consistent grid spacing which allows for a thorough diagnosis of time-series information. There is no averaging of multiple pixels as each data point in a file represents a single GAC pixel-level value. Variables are produced on a 0.1 degree Latitude/Longitude grid with dimensions of 3601 by 1801. Each daily PATMOS-x product file provides data derived from one NOAA POES satellite in either an ascending or descending orbital node. Spatial overlap of orbital coverage occurs at most latitudes. Highlights of the product include improved accuracy in geolocation and improved reflectance calibrations of the AVHRR data. Reflectance from the visible and Near Infrared (VIS/NIR) channels 1, 2 and 3a on AVHRR constitute this fundamental Climate Data Record (CDR).
- Cite this dataset when used as a source.
- NCEI DSI 3626_01
- gov.noaa.ncdc:C00831
Distribution Formats |
- NetCDF (Version: 4)
- File Specification: The NetCDF data files comply with the Climate and Forecast (CF) Metadata Conventions and the NetCDF Attribute Convention for Dataset Discovery (ACDD).
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Ordering Instructions |
Contact NCEI for other distribution options and instructions. |
Distributor |
NOAA National Centers for Environmental Information ncei.info@noaa.gov
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Dataset Point of Contact |
NOAA Climate Data Record Program Office DOC/NOAA/NESDIS/NCEI > National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce +1 828-271-4412 avhrr_patmosx_contacts@noaa.gov
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Time Period |
1978-11-05 to 2009-12-28 |
Spatial Bounding Box Coordinates |
West: -180
East: 180
South: -90
North: 90
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Spatial Coverage Map |
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General Documentation |
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Associated Resources |
- NCEI Dataset Landing Page for the Current Version
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Publication Dates |
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Edition |
Version 5.2 |
Data Presentation Form |
Digital image
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Dataset Progress Status |
Complete - production of the data has been completed Historical archive - data has been stored in an offline storage facility Superseded - replaced by new |
Data Update Frequency |
Not planned |
Supplemental Information |
Fundamental Climate Data Record (FCDR) |
Purpose |
These data provide a long-term climate data record of high-quality radiometric data from AVHRR GAC observations. |
Use Limitations |
- *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.*
- See the Algorithm Theoretical Basis Document for a description of use limitations.
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Dataset Citation |
- Cite this dataset when used as a source.
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Cited Authors |
- UWI-MAD/SSEC/CIMSS > Cooperative Institute for Meteorological Satellite Studies, Space Science and Engineering Center, University of Wisconsin, Madison
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Originators |
- UWI-MAD/SSEC/CIMSS > Cooperative Institute for Meteorological Satellite Studies, Space Science and Engineering Center, University of Wisconsin, Madison
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Publishers |
- 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
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Theme keywords |
Global Change Master Directory (GCMD) Science Keywords
- Earth Science > Atmosphere > Atmospheric Radiation > Longwave Radiation
- Earth Science > Atmosphere > Atmospheric Radiation > Reflectance
- Earth Science > Atmosphere > Atmospheric Radiation > Shortwave Radiation
- Earth Science > Spectral/Engineering > Infrared Wavelengths > Brightness Temperature
- Earth Science > Spectral/Engineering > Visible Wavelengths > Visible Radiance
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Data Center keywords |
Global Change Master Directory (GCMD) Data Center Keywords
- 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
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Platform keywords |
Global Change Master Directory (GCMD) Platform Keywords
- Earth Science > Tiros-N > Television Infrared Observation Satellite-N
- Earth Science > Noaa-7 > National Oceanic & Atmospheric Administration-7
- Earth Science > Noaa-9 > National Oceanic & Atmospheric Administration-9
- Earth Science > Noaa-11 > National Oceanic & Atmospheric Administration-11
- Earth Science > Noaa-12 > National Oceanic & Atmospheric Administration-12
- Earth Science > Noaa-14 > National Oceanic & Atmospheric Administration-14
- Earth Science > Noaa-15 > National Oceanic & Atmospheric Administration-15
- Earth Science > Noaa-16 > National Oceanic & Atmospheric Administration-16
- Earth Science > Noaa-17 > National Oceanic & Atmospheric Administration-17
- Earth Science > Noaa-18 > National Oceanic & Atmospheric Administration-18
- Earth Science > Noaa-19 > National Oceanic & Atmospheric Administration-19
- Earth Science > Metop-A > Meteorological Operational Satellite - A
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Instrument keywords |
Global Change Master Directory (GCMD) Instrument Keywords
- Earth Science > Avhrr > Advanced Very High Resolution Radiometer
- Earth Science > Avhrr-2 > Advanced Very High Resolution Radiometer-2
- Earth Science > Avhrr-3 > Advanced Very High Resolution Radiometer-3
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Place keywords |
Global Change Master Directory (GCMD) Location Keywords- Geographic Region > Global
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Project keywords |
Keyword Thesaurus Title- NOAA Climate Data Record (CDR) Program
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Use Constraints |
- Cite this dataset when used as a source.
- 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.
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Access Constraints |
- 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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Fees |
- 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.
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Lineage information for: repository |
Processing Steps |
- 2015-04-22T00:00:00 - 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.
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Last Modified: 2023-09-13
For questions about the information on this page, please email:
ncei.info@noaa.gov