Calculation procedure of daily values for the totalizer stations
- Distances between each totalizer station and each daily rainfall station
have been calculated under ArcView; the results have been exported to Access (table "T_proxy").
- For each year the nearest 5 daily stations are determined for each totalizer station.
- For each totalizer, all days with precipitation values of these 5 neighbouring stations are selected.
Dates at which 2 or more stations show rainfall are assumed to be precipitation days at the totalizer station.
- The daily values for the totalizer stations of these days are calculated
from the average of 5 neigbouring stations for the respective day, multiplied with the annual
totalizer sum and divided by the annual total of the 5 stations' average for these rainy days.