Advanced data handling
Milestone ID: 451
Restructure data handling work flow. Current workflow should be splitted into
Station Preparation (#140 (closed))
Data Preparation (#141 (closed))
Data Collection (#142 (closed))
Iterator (#143 (closed))
Specific requirements are listed in related issues. In general the advanced data handling should help to create inputs from different data sources (neighbouring stations, model fields, etc).
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