| Concept URI | http://dd.eionet.europa.eu/vocabulary/aq/aggregationprocess/P1Y-WA-avg | 
|---|---|
| Preferred label | yearly mean weighted average | 
| Definition | The mean for a multi-__day sampler based data types shall be evaluated in a similar way to the data capture (see section 4.2)- although in this instance is calculated as the time weighted mean of valid measurements over the sample period. mean = _i DCi * Nvalid-i Cvalid-i / _i DCi * Nvalid-i i=1.... n where DCi = the data capture of sample i Nvalid-i = the number of hours of the valid sampling period i Cvalid-i = concentration for valid sampling period i | 
| Notation | P1Y-WA-avg | 
| Status | Valid | 
| Status Modified | 2014-04-15 | 
| Accepted Date | 2014-04-15 | 
| Not Accepted Date | |
| Broader reporting metric | 
European Environment Agency
                        
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