Support multiple identical parameters in NetCDF
When a station has multiple, redundant parameters (TA_1, TA_2 or TA_10, TA_100, TA_50) it is possible to support it nicely in NetCDF:
- use "air temperature" as standard_name (from NetCDF-CF standard names)
- use different variable names (such as TA_10, TA_50...)
- clarify what it is in long_name (Thygan, Rotronic, TA at 50cm, ...)
This might involve some changes into our NetCDF schemas...