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FAQ: Difference between revisions
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→My station invented some rain that didn't really occur, and I want to set it to zero (or some other figure)
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Cumulus does include some code to try to ignore some obvious rain errors:
*For example, if the station reports negative (the counter that Cumulus uses decreases in value) rain, Cumulus will normally ignore that, but if for 6 consecutive readings the rain cumulative count stays below what it was before, Cumulus will normally accept the new count as a new starting point.
*While Cumulus is running (not when catching up with stored past values from the station log), it will ignore large increases in rainfall. (See [[#.28Invented_rain.29_Error_prevention_by_Spike_removal|below]]).
Because many positive values are realistic (see sub-answers), Cumulus generally will accept those odd increases as a result of accidental knocking of a tipping bucket gauge, due to wind effects on the gauge, or even due to the station electronics generating a rogue reading.
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