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NOAA-11 AVHRR Atmospherically Corrected Surface Reflectance Daily L3 Global 0.05Deg CMG

Metadata Updated: February 12, 2024

The Long-Term Data Record (LTDR) produces, validates, and distributes a global land surface climate data record (CDR) that uses both mature and well-tested algorithms in concert with the best-available polar-orbiting satellite data from past to the present. The CDR is critically important to studying global climate change. The LTDR project is unique in that it serves as a bridge that connects data derived from the NOAA Advanced Very High Resolution Radiometer (AVHRR), the EOS Moderate resolution Imaging Spectroradiometer (MODIS), the Suomi National Polar-orbiting Partnership (SNPP) Visible Infrared Imaging Radiometer Suite (VIIRS), and Joint Polar Satellite System (JPSS) VIIRS missions. The LTDR draws from the following eight AVHRR missions: NOAA-7, NOAA-9, NOAA-11, NOAA-14, NOAA-16, NOAA-18, NOAA-19, and MetOp-B.

Currently, the project generates a daily surface reflectance product as the fundamental climate data record (FCDR) and derives daily Normalized Differential Vegetation Index (NDVI) and Leaf-Area Index/fraction of absorbed Photosynthetically Active Radiation (LAI/fPAR) as two thematic CDRs (TCDR). LAI/fPAR was developed as an experimental product.

The NOAA-11 AVHRR Atmospherically Corrected Surface Reflectance Daily L3 Global 0.05 Deg. CMG, short-name N11_AVH09C1 is generated from GIMMS Advanced Processing System (GAPS) BRDF-corrected Surface Reflectance product (AVH01C1). The M1_AVH09C1 consist of BRDF-corrected surface reflectance for bands 1, 2, and 3, data Quality flags, angles (solar zenith, view zenith, and relative azimuth), and thermal data (thermal bands 3, 4, and 5). The AVH09C1 product is available in HDF4 file format.

Access & Use Information

Public: This dataset is intended for public access and use. License: No license information was provided. If this work was prepared by an officer or employee of the United States government as part of that person's official duties it is considered a U.S. Government Work.

Downloads & Resources


Metadata Created Date September 14, 2023
Metadata Updated Date February 12, 2024

Metadata Source

Harvested from NASA Data.json

Additional Metadata

Resource Type Dataset
Metadata Created Date September 14, 2023
Metadata Updated Date February 12, 2024
Publisher Not provided
Identifier C2738334103-LAADS
Data First Published 2022-10-06
Language en-US
Data Last Modified 1995-01-01
Category NOAA - SPACE WEATHER PROGRAM, geospatial
Public Access Level public
Bureau Code 026:00
Metadata Context
Metadata Catalog ID
Schema Version
Catalog Describedby
Citation The Long-Term Data Record (LTDR) project. 2023-07-25. NOAA-11 AVHRR Atmospherically Corrected Surface Reflectance Daily L3 Global 0.05 Deg. CMG. Version 6. MODAPS at NASA/GSFC. Archived by National Aeronautics and Space Administration, U.S. Government, L1 and Atmosphere Archive and Distribution System (LAADS).
Creator The Long-Term Data Record (LTDR) project
Harvest Object Id f646cd2f-a7d2-4db3-96e6-774f182d50ba
Harvest Source Id 58f92550-7a01-4f00-b1b2-8dc953bd598f
Harvest Source Title NASA Data.json
Homepage URL
Metadata Type geospatial
Old Spatial -180.0 -90.0 180.0 90.0
Program Code 026:001
Release Place MODAPS at NASA/GSFC
Source Datajson Identifier True
Source Hash c05831bb76227f38ae534e17fe011ec6166873d5e05f06d02d7781e3cfa21201
Source Schema Version 1.1
Temporal 1988-11-08T00:00:00Z/1995-01-01T23:59:59.900Z

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