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NOAA Climate Data Record (CDR) of AVHRR Surface Reflectance, Version 4 (Version Superseded)

Published by NOAA National Centers for Environmental Information | National Oceanic and Atmospheric Administration, Department of Commerce | Catalog Last Checked: April 12, 2026 at 09:15 PM | Dataset Last Updated: May 21, 2014 at 12:00 AM
*Note: This dataset version has been superseded by a newer version.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 dataset contains gridded daily surface reflectance and brightness temperatures derived from the Advanced Very High Resolution Radiometer (AVHRR) sensors onboard eight NOAA polar orbiting satellites: NOAA-7, -9, -11, -14, -16, -17, -18 and -19. Surface reflectance from AVHRR channels 1 and 2 (at 640 and 860 nm) are a NOAA Climate Data Record (CDR). The dataset spans from 1981 to 10 days before the present, and was processed from the AVHRR Global Area Coverage (GAC) Level 1b dataset. AVHRR GAC observations are packaged into data arrays with latitude and longitude dimensions of 3600 x 7200 covering the globe at 0.05 degree spatial resolution. This dataset is one of the Land Surface CDR products produced by the NASA Goddard Space Flight Center (GSFC) and the University of Maryland (UMD). Other Land Surface CDR products include the Normalized Difference Vegetation Index (NDVI), Leaf Area Index (LAI) and Fraction of Absorbed Photosynthetically Active Radiation (FAPAR). Improvements made for Version 4 include 1) additional data from NOAA satellites extending the time period, 2) improved geolocation accuracy from use of OLE instead of TLE, 3) center of the grid is used as the reference, and 4) data value of a grid cell is computed as an average of available good observations. The dataset is in the netCDF-4 file format following ACDD and CF Conventions. The dataset is accompanied by algorithm documentation, data flow diagram and source code for the NOAA CDR Program.

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Earth Science > Land Surface > Surface Radiative Properties > Reflectance Earth Science > Spectral/Engineering > Infrared Wavelengths > Brightness Temperature Geographic Region > Global Land NOAA Climate Data Record (CDR) Program NOAA OneStop Project AVHRR > Advanced Very High Resolution Radiometer NOAA-7 > National Oceanic & Atmospheric Administration-7 NOAA-9 > National Oceanic & Atmospheric Administration-9

Complete Metadata
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identifier https://data.noaa.gov/waf/NOAA/NESDIS/ncei/aim/iso/xml/C00811.xml
issued 1986-12-31T00:00:00.000+00:00
keyword 
                                            [
  "Earth Science > Land Surface > Surface Radiative Properties > Reflectance",
  "Earth Science > Spectral/Engineering > Infrared Wavelengths > Brightness Temperature",
  "Geographic Region > Global Land",
  "NOAA Climate Data Record (CDR) Program",
  "NOAA OneStop Project",
  "AVHRR > Advanced Very High Resolution Radiometer",
  "NOAA-7 > National Oceanic & Atmospheric Administration-7",
  "NOAA-9 > National Oceanic & Atmospheric Administration-9",
  "NOAA-11 > National Oceanic & Atmospheric Administration-11",
  "NOAA-14 > National Oceanic & Atmospheric Administration-14",
  "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",
  "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",
  "NASA/GSFC > Goddard Space Flight Center, NASA",
  "UMD > University of Maryland"
]
language 
                                            []
license https://creativecommons.org/publicdomain/zero/1.0/
modified 2014-05-21T00:00:00.000+00:00
publisher 
                                            {
  "name": "NOAA National Centers for Environmental Information",
  "@type": "org:Organization"
}
rights otherRestrictions
spatial -87.6941690000912,30.0293260005681,-87.8794330000795,30.2434029996669
temporal 1984-01-01T00:00:00+00:00/1986-12-31T00:00:00+00:00
title NOAA Climate Data Record (CDR) of AVHRR Surface Reflectance, Version 4 (Version Superseded)

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