Level 1B: Data products are processed to sensor units. The BDS
product contains CERES footprint filtered broadband radiances, geolocation and
viewing geometry, Sun geometry, satellite position and velocity, and all raw
engineering and status data from the instrument.
Level 2: Data products are derived geophysical variables at the
CERES footprint resolution as the Level 1B source data. They include the Level
1B parameters, along with the retrieved or computed geophysical variables such
as radiative broadband fluxes and their associated MODIS cloud properties.
Level 3: Data products are the radiative fluxes and cloud properties
that are spatially averaged into uniform regional and zonal grids and globally
and also temporally averaged into daily, monthly hourly, or monthly means.
Level 4: Level 3 data products that are adjusted within their range
of uncertainty so as to satisfy known constraints on the climate system (e.g.,
consistency between average global net TOA flux imbalance and ocean heat
storage).
