| 15 | 15 | Actually, the consideration of an offline or online implementation is not an ultimate one. In fact, one can consider to implement first an offline system and later move on to an online system. This is due to the fact that the observation-related routines (observation operator, initialization of array holding observations) perform the same operations in online and offline systems. However, in an offline system all information about the model fields like the location of individual grid points is read from the model files. In contrast, in an online implementation, this information is usually taken from some array of the model code. Spatial information about observations is read from a files in both implementation variants. In addition, one need routines to write state estimates into files in both implementation variants. |
