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Introduction to secondary validation SpatialHomogeneityCheck
Overwrites the flag of the timeseries with unreliable or doubtful when the estimation of the value based on neighbouring values differs too much from the observed value. The criteria for that can be specified to be a maximum threshold or relative (i.e. percentage of the standard deviation) or both. The estimation is based upon a maximum number of closest by other locations within a maximum search radius.
The purpose of this check is to update the flags of the output timeseries whenever the error exceeds the specified threshold. The error is defined by the difference between the value and the estimation which is the average of the values from the selected neighbouring locations weighted for distance. Note that the check suppports non-equidistant comparison where timesteps should be within the same fixed range +/- 500 milliseconds.
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