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File naming convention
NetCDF files are named using the following convention:
Example NetCDF naming for near-real time processed data:
Example NetCDF naming for reprocessed data:
The weekly grids are given in standardized binary data format (Network common data form: NetCDF v4). Global attributes are given in Table 2. The variables are given as grid arrays, see, therefore Table 3. NetCDF files are formatted according to CF conventions: CF-1.6 ACDD-1.3. We use a scaling factor of 10^-3 and a fillvalue = -2147483647.
Table 2: Global attributes from an example NetCDF file, covering the week from March 26 to April 01, 2018.
Table 3: NetCDF file content. Note, that we use a scaling factor of 10^-3 and a fillvalue = -2147483647.
All grids are projected onto the 25 km EASE2 Grid, which is based on a polar aspect spherical Lambert azimuthal equal-area projection (Brodzik et al., 2012). The grid dimension is 5400 km x 5400 km, equal to a 432 x 432 grid. The grid is centered on the geographic Pole, meaning that the Pole is located at the intersection of center cells (Figure 1).
Figure1: Specifications of the EASE2 25 km grid, which is used for the merged product.
Visualization of NetCDF data: