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

This dataset contains gridded daily surface reflectance and brightness temperatures derived from the Advanced Very High Resolution Radiometer (AVHRR) sensors onboard seven NOAA polar orbiting satellites: NOAA-7, -9, -11, -14, -16, -17, and -18. 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 from the present, and is 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. The Version 4 Land Surface CDR products were produced by the NASA Goddard Space Flight Center (GSFC) and the University of Maryland. Changes for version 4 from version 3 include 1) added data from NOAA-16 and NOAA-17 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. This CDR is used as an input to other Land Surface CDR products including the Normalized Difference Vegetation Index (NDVI), Leaf Area Index (LAI) and the Fraction of Absorbed Photosynthetically Active Radiation (FAPAR). The product was converted from HDF to netCDF-4 with CF metadata, and is accompanied by algorithm documentation, data flow diagram and source code for the NOAA CDR Program.

Data and Resources

Field Value
accessLevel public
accrualPeriodicity R/P1D
bureauCode {006:48}
catalog_@context https://project-open-data.cio.gov/v1.1/schema/catalog.jsonld
catalog_conformsTo https://project-open-data.cio.gov/v1.1/schema
catalog_describedBy https://project-open-data.cio.gov/v1.1/schema/catalog.json
identifier gov.noaa.ncdc:C00811
language {en-US}
modified 2014-05-21
old-spatial {"type": "Polygon", "coordinates": [[[-180.0, -90.0], [180.0, -90.0], [180.0, 90.0], [-180.0, 90.0], [-180.0, -90.0]]]}
programCode {006:059}
publisher DOC/NOAA/NESDIS/NCDC > National Climatic Data Center, NESDIS, NOAA, U.S. Department of Commerce (Point of Contact)
resource-type Dataset
source_datajson_identifier true
source_hash e6cfee74cec61487544358c9fb49a398d9a6a234
source_schema_version 1.1
spatial {"type": "Polygon", "coordinates": [[[-180.0, -90.0], [180.0, -90.0], [180.0, 90.0], [-180.0, 90.0], [-180.0, -90.0]]]}
Groups
  • AmeriGEOSS
  • National Provider
  • North America
Tags
  • amerigeo
  • amerigeoss
  • avhrr-advanced-very-high-resolution-radiometer
  • ckan
  • doc-noaa-nesdis-ncdc-national-climatic-data-center
  • earth-science-atmosphere-atmospheric-radiation-reflectance
  • earth-science-spectral-engineering-infrared-wavelengths-brightness-temperature
  • geo
  • geographic-region-global-land
  • geoss
  • nasa
  • nasa-gsfc-goddard-space-flight-center
  • national
  • nesdis
  • noaa
  • 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-7-national-oceanic-atmospheric-administration-7
  • noaa-9-national-oceanic-atmospheric-administration-9
  • north-america
  • u-s-department-of-commerce
  • umd-university-of-maryland
  • united-states
isopen False
license_id notspecified
license_title License not specified
maintainer DOC/NOAA/NESDIS/NCDC > National Climatic Data Center, NESDIS, NOAA, U.S. Department of Commerce
maintainer_email land_sfc_bundle_contacts@noaa.gov
metadata_created 2025-11-21T12:01:40.914057
metadata_modified 2025-11-21T12:01:40.914060
notes This dataset contains gridded daily surface reflectance and brightness temperatures derived from the Advanced Very High Resolution Radiometer (AVHRR) sensors onboard seven NOAA polar orbiting satellites: NOAA-7, -9, -11, -14, -16, -17, and -18. 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 from the present, and is 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. The Version 4 Land Surface CDR products were produced by the NASA Goddard Space Flight Center (GSFC) and the University of Maryland. Changes for version 4 from version 3 include 1) added data from NOAA-16 and NOAA-17 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. This CDR is used as an input to other Land Surface CDR products including the Normalized Difference Vegetation Index (NDVI), Leaf Area Index (LAI) and the Fraction of Absorbed Photosynthetically Active Radiation (FAPAR). The product was converted from HDF to netCDF-4 with CF metadata, and is accompanied by algorithm documentation, data flow diagram and source code for the NOAA CDR Program.
num_resources 7
num_tags 26
title NOAA Climate Data Record (CDR) of AVHRR Surface Reflectance, Version 4