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FAQ: Difference between revisions
→My monthly and/or annual rainfall totals are wrong
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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) ==
=== (Invented rain) Error in today's total===
#correct today's total using the 'today's rain' editor on the edit menu.
#optionally stop Cumulus and edit [[today.ini]] to change the ''LastTip=''(look up previous value in a recently backed up today.ini) parameter.
#Remember that 'ConsecutiveDryDays' does not include today.
=== (Invented rain) Error in yesterday's total ===
#edit the total for the relevant day in dayfile.txt, using the dayfile.txt editor on the edit menu.
#optionally edit yesterday's total (which is only held temporarily for display purposes) in [[today.ini]], while Cumulus is stopped.
=== (Invented rain) Error in total for any day before today ===
Just edit the total for the relevant day in dayfile.txt, using the dayfile.txt editor on the edit menu.
=== (Invented rain) Error in total, or extremes, for this month and/or this year ===
See next FAQ.
=== (Invented rain) Error in all-time records ===
If your all-time records, or month-by-month all-time records have been affected, you can use the built-in editors to fetch the correct values once you have corrected dayfile.txt.
=== (Invented rain and) Other rain figures ===
Note that other rain figures, such as 'rain last hour' and 'rain last 24 hours' depend on a sensible progression of the rain counter, so it's not easy to correct this; it's easier to wait until the erroneous figure is far enough in the past so as not to affect the calculation. If you really do want to try to correct it, you would need to stop Cumulus find and edit field 11 (assuming date is field 0) the 'total rain counter' in the [[monthly_log_files]] values in the current monthly log file so they are correct relative to the current value of the rain counter (i.e. the latest one logged).
=== (Invented rain) Error prevention by Spike removal ===
#It is better to try to avoid spurious rain being recorded in the first place.
#Cumulus attempts to ignore large increases in the rain total automatically, and is quite often successful.
#For 'hourly rain' and 'rain rate', you can set 'spike removal' settings on the calibration settings screen. The value you set here, is the maximum change allowed between successive observations. These apply only to Fine Offset and La Crosse stations (which are known to occasionally produce faulty rain readings).
=== (Invented rain) More information ===
There is more information about correcting rogue data elsewhere in the Wiki, in the pages about the [[:Category:Log_Files|log files]].
== My monthly and/or annual rainfall totals are wrong ==
The monthly and annual rainfall totals are calculated from [[FAQ#My_station_invented_some_rain_that_didn.27t_really_occur.2C_and_I_want_to_set_it_to_zero_.28or_some_other_figure.29 |today's rain total]] in [[today.ini]] and the daily totals in [[Dayfile.txt]]. There is a built in editor for ''Today's rain''. The format of the dayfile.txt file is in the help file (in the section “Data log file format”), or in [[Dayfile.txt|Wiki here]]; if you need to edit it:
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If you need to, you can specify a year-to-date total to add in for the period up to the point where you started using Cumulus, so that your first year’s total is correct. This is on the Station Configuration screen. Make sure you specify the first Cumulus operating year here, otherwise the extra will be added to the annual total for the wrong year!
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