NASA Land Long Term Data Record (LTDR) project page.Climate Algorithm Theoretical Basis Document (C-ATBD)Īlgorithm Theoretical Basis Document for the CDR.The source code is not intended to be portable to any computer system(s) beyond that of the original CDR producer's environment. The source code is provided to maintain transparency of the algorithm and processes used in creating the Climate Data Record (CDR). The dataset is accompanied by algorithm documentation, data flow diagram and source code for the NOAA CDR Program.Īccess to the published CDR, documentation and source code. The dataset is in the netCDF-4 file format following ACDD and CF Conventions. Version 5 also corrects the data for known errors in time, latitude, and longitude variables, as well as improves the global and variable attribute definitions. Scientific improvements for Version 5 include updating to higher resolution ancillary data and more accurate approaches for BRDF correction, calibration, compositing, and QA.

Other Land Surface CDR products include the Normalized Difference Vegetation Index (NDVI), Leaf Area Index (LAI) and Fraction of Absorbed Photosynthetically Active Radiation (FAPAR). This dataset is one of the Land Surface CDR Version 5 products produced by the NASA Goddard Space Flight Center (GSFC) and the University of Maryland (UMD).

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 dataset spans from 1981 to 10 days before the present, and was processed from the AVHRR Global Area Coverage (GAC) Level 1b dataset. Surface reflectance from AVHRR channels 1 and 2 (at 640 and 860 nm) are a NOAA Climate Data Record (CDR). 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.

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