Welcome to the AirNet Sensor Data Quality Validation service.
Station: PUR IED Evangelista Exter 754066, Bogota, Colombia also known as "Ciencia ciudadana por la Calidad del Aire 754066" located at "IED Juan Evangelista Gomez, Calle 37B Sur, Las Guacamayas, UPZ La Gloria, Localidad San Cristóbal, Bogota, Bogota, Capital District, 110431, Colombia".Explanations
On the first graph below (labeled "data readings confidence zone"), the red line represents the hourly readings from the sensor, while the green line represents the median of the hourly readings of the station neighbors.
The zone filled in green represents the confidence zone, equivalent to 3 times the standard deviation of the neighbor stations.
Each time the station hourly reading goes above the confidence zone, the station is considered producing abnormal reading.
The larger the difference between the hourly reading and confidence zone, the more likely the station is considered as producing invalid data.
The formula is defined as:
P=probability, D=distance and W=P*D
where 'i' is iterated over the past 3 days data and 'n' is the number of samples during those past 3 days (most likely n = 24*3).
If W>30, the station is automatically disabled.
Show me the data
Further questions
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