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With 'Definition Areal Series Weights' the user can make areal relations by selecting Series Codes for the Areal Series and for the Point Series. The function gives the possibility to enter equal weights or specified station weights.
Areal series^image001.gif!
Equal station weights
The weight given to a station is inversely proportional to the number of point rainfall stations: if the number of stations is N then the weight is 1/N. The weight is adjusted if at one or more point rainfall stations a value is missing; say at M stations an observation for a particular time step is missing, then the weights for the remaining stations for that time step becomes 1/(N-M). Only if M=N a missing value will be entered for the areal rainfall.
The combination of point rainfall stations to compute the areal rainfall can be stored in a file to be used at a later stage for different time periods.
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