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Data levels

Data Product Levels are the classification of data products by the sort of processing used in their generation and, to a lesser extent, the sort of uses to which these products might be put.

The levels described below are consistent with those defined by the EOS Advisory Panel in its report and CODMAC definitions.

The levels are as follows:

  • Level 0
    Reconstructed unprocessed instrument data at full space-time resolution with all available supplemental information to be used in subsequent processing (e.g. ephemeris, health and safety) appended.

  • Level 1A
    Unpacked, reformatted Level 0 data at full space-time resolution with all supplemental information to be used in subsequent processing appended.

  • Level 1B
    Radiometrically corrected and calibrated data in physical units at full instrument resolution as acquired.

  • Level 2
    Retrieved environmental variables (e.g., ocean wave height, soil moisture, ice concentration) at the same resolution and location as the level 1
    source data.

  • Level 3
    Data or retrieved environmental variables which have been spatially and/or temporally resampled (i.e. derived from level 1 or 2 products). Such resampling may include averaging and compositing.

  • Level 4
    Model output or results from analyses of lower level data (i.e. variables that are not directly measured by the instruments, but are derived from these measurements).

For further details please view the following article on the Committee for Earth Observation Satellites (CEOS) website.