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- Observations for EFAS are collected, quality checked, and interpolated by the CEMS-Meteorological Data Collection Centre (more details in this page). The interpolation algorithm is Spheremap: more details can be found in Thiemig et al. 2022.
NWPs are upsampled from their native resolution to the desired resolution of EFAS and GloFAS using the interpolation algorithms implemented in the open-source pre-processor pyg2p. Nearest neighbor interpolation was used up to EFAS v4 and GloFAS v3 (5km European and 0.1 degrees global set-ups, respectively). Bilinear interpolation is used for EFAS v5 and GloFAS v4 (1 arcmin European and 0.05 degrees global set-ups, respectively).
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