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Calculate Missing Values: Difference between revisions
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# Current air pressure (absolute or sea-level) | # Current air pressure (absolute or sea-level) | ||
By default [[Cumulus. | By default [[Cumulus.ini_(Cumulus_1)#Read-only_parameters_in_the_Station_section|see here]], Cumulus will stop processing any readings from a weather station unless the above 4 source values are being supplied and reveal they are being updated (failure is set is after a total of 6 unsuccessful consecutive attempts to read each of these). | ||
Cumulus also expects that your weather station can provide: | Cumulus also expects that your weather station can provide: | ||
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* Air pollution measurement | * Air pollution measurement | ||
There are some configuration settings [[Cumulus. | There are some configuration settings [[Cumulus.ini_(Cumulus_1)#Read-Write_parameters_in_the_Station_section|here]] where you can decide whether to use a weather station supplied dewpoint temperature and whether to use a weather station supplied wind chill temperature. | ||
===How Cumulus might transform a Source Value=== | ===How Cumulus might transform a Source Value=== | ||
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*For some weather data processed by Cumulus the value sent by the weather station and that used by Cumulus will be different: | *For some weather data processed by Cumulus the value sent by the weather station and that used by Cumulus will be different: | ||
** This can be because the units used by the weather station, and the units required by the Cumulus user are different (and Cumulus allows the user to select the units in which values will be stored) | ** This can be because the units used by the weather station, and the units required by the Cumulus user are different (and Cumulus allows the user to select the units in which values will be stored) | ||
** This can be because the user has entered some calibration settings. The exact settings available vary for different weather data, but in some cases a second order multiplier is available (the square of the input value is multiplied by the second order multiplier), a first order multiplier is available (the input value is multiplied by the first order multiplier), and an offset is available (added to the input value). If you want to understand how this works, please see [[Cumulus. | ** This can be because the user has entered some calibration settings. The exact settings available vary for different weather data, but in some cases a second order multiplier is available (the square of the input value is multiplied by the second order multiplier), a first order multiplier is available (the input value is multiplied by the first order multiplier), and an offset is available (added to the input value). If you want to understand how this works, please see [[Cumulus.ini_(Cumulus_1)#Offsets]] for the details | ||
**A weather station might use a rainfall counter, Cumulus converts it to a rainfall rate (based on difference between two counter readings scaled up to represent amount per hour) | **A weather station might use a rainfall counter, Cumulus converts it to a rainfall rate (based on difference between two counter readings scaled up to represent amount per hour) | ||
